# Spatial Hearing in Analytic Philosophy Since 2006 ## Executive Summary The analytic-philosophy literature on spatial hearing since 2006 is best approached through three connected questions. First, what are sounds: waves, properties, events, event-parts, or something else? Second, what does auditory experience present: distal locations, empty space, source events, auditory objects, streams, or some combination of these? Third, what happens when the familiar cases start to fray: silence, reverberation, echoes, hallucinated silence, and echolocation? Those cases are not decorative examples. They are where theories of auditory spatial content show what they are committed to. On PhilPapers, the discussion is anchored by [[Casey O'Callaghan]] and [[Matthew Nudds]], especially O'Callaghan's *Sounds* (2007) and the edited collection *Sounds and Perception* (2009). The later debate extends through work by [[Nick Young]], [[Ian Phillips]], [[Błażej Skrzypulec]], [[Keith A. Wilson]], and others. The field, at least as it appears through the constrained PhilPapers corpus used here, is not a loose collection of papers about hearing. It is a structured dispute about the relation between sound ontology, auditory content, and limit cases in which the object of hearing is hard to specify. The conclusion I would draw with most confidence is that analytic philosophy of audition has moved away from treating hearing as a thin form of acoustic detection. Much of the recent work takes audition to present source events, objects, their locations, reverberant volumes, spatial directions, and sometimes absences such as silence. The question is no longer simply whether audition is spatial at all. It is how audition is spatial, what exactly is represented as spatial, and whether the spatial character belongs to audition in a strict sense, to a richer everyday conception of hearing, or to a multisensory perceptual package. Silence has also become one of the places where the debate does real work. Sorensen's claim that silence can genuinely be heard opens onto later work by Phillips, O'Callaghan, Meadows, Gow, and Skrzypulec on absence perception, spatial content, hallucinated silence, causal theories of perception, and the boundary between perception and cognition. Silence is not a side issue in the recent corpus. It functions as a way of asking what auditory space would have to be like if it can present sounding things and also the absence of sound. The ranked corpus shows two large publication waves. The first runs from 2007 to 2013, and is driven by sound ontology, auditory content, and the concentration of chapters in *Sounds and Perception*. The second runs from 2017 to 2025, with renewed attention to hearing space itself, richer accounts of auditory content, musical and speech cases, auditory fields, wave theory, and aspatialism. The publication chart below is a tally of the curated top-30 corpus, normalised to original publication year where PhilPapers displayed reprints or multiple versions. ## Corpus Boundaries and Assumptions This report uses PhilPapers only. I have treated PhilPapers bibliographic metadata, abstracts, search-result snippets, category pages, and linked entry pages as the evidence base. The ranked corpus is limited to articles, book chapters, and books from 2006 onwards. Dissertations and encyclopedia entries are excluded from the top-30 list, even where they are philosophically relevant or visible on PhilPapers. Two assumptions about the data matter. PhilPapers sometimes displays multiple entries, versions, or reprints of the same work, and citation counts can vary between a search-result cluster and a particular entry page. I therefore treat the citation count as the PhilPapers-visible count for the version or search result consulted, not as a fully normalised bibliometric measure. I mark missing or unstable counts as `n/a` where needed. The timeline and chart also concern the ranked top-30 corpus, not every relevant PhilPapers record. The language constraint should also be explicit. I prioritised the English-language analytic-philosophy literature, because that is where these debates are concentrated on PhilPapers and because the brief was for an English report. Some adjacent non-English or phenomenological works appeared during the search, but the ranked table deliberately favours the English-language analytic discussion. The spike in 2009 reflects the role of *Sounds and Perception*. The cluster in 2017 reflects renewed work on auditory space, richer auditory content, musical space, and multisensory-adjacent cases. The sparse recent years do not show lack of interest by themselves; they reflect the strict top-30 selection under the source and genre constraints. ```mermaid timeline title Publication trend in the ranked PhilPapers top-30 corpus 2007 : O'Callaghan's event theory of sound 2009 : Sounds and Perception : Spatial hearing, sound location, and silence 2010 : Auditory-object debates 2011-2013 : Beyond-vision and silence debates 2017-2018 : Hearing space, musical space, richness, and event-hearing 2020-2022 : Silence, speech objects, and spatial content 2023-2025 : Auditory field, wave theory, and aspatialism ``` ```mermaid xychart-beta title "Publication counts by year in the ranked top-30 corpus" x-axis [2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025] y-axis "Entries" 0 --> 6 bar [1, 1, 6, 3, 1, 0, 2, 0, 0, 0, 5, 2, 0, 2, 1, 2, 1, 2, 1] ``` ## Top 30 PhilPapers Entries The list is ranked by direct topical relevance to spatial hearing, broadly construed, with PhilPapers citation counts used as a secondary ordering consideration. `PP cites` means the citation count visible on the entry or search result consulted. Because versions and duplicate entries can differ, the numbers should be read as entry-level indicators rather than a clean bibliometric series. | Rank | Bibliographic citation | Link | Type | Year | PP cites | Role in the debate | |---:|---|---|---|---:|---:|---| | 1 | O'Callaghan, Casey. *Sounds: A Philosophical Theory*. New York: Oxford University Press. | [PhilPapers](https://philpapers.org/rec/OCASAP) | Book | 2007 | 488 | O'Callaghan's book is the reference point for contemporary analytic work on audition. He argues against secondary-quality views and simple wave views, and defends an event theory on which sounds are disturbances of a medium located at or near their sources. For spatial hearing, the book matters because location, propagation, echoes, reverberation, Doppler effects, and perceptual constancy are built into the account from the start. It sets the terms of later work by insisting that sound ontology answer to auditory phenomenology without collapsing into crude common sense. Nearly every later spatial-hearing paper in the corpus reacts to, modifies, or rejects some part of this framework. | | 2 | Nudds, Matthew, and Casey O'Callaghan, eds. *Sounds and Perception: New Philosophical Essays*. Oxford: Oxford University Press. | [PhilPapers](https://philpapers.org/rec/NUDSAP-5) | Book | 2009 | 156 | This collection gathers much of the early field in one place. It consolidates the ontology of sound debate while also making spatiality, auditory objects, silence, speech, and musical listening into philosophical topics in their own right. Methodologically, it shows analytic philosophers combining phenomenology, metaphysics, and empirically informed perception theory. Many of the cited and topically relevant entries below are chapters from this volume, which is why 2009 appears as the visible publication spike in the constrained corpus. | | 3 | O'Callaghan, Casey. "Object Perception: Vision and Audition." *Philosophy Compass* 3 (4): 803-829. | [PhilPapers](https://philpapers.org/rec/OCAOPV) | Article | 2008 | 137 | O'Callaghan broadens the discussion from sounds to auditory objects. Starting from vision-centred theories of object perception, he argues that audition has an analogue of object perception as well. This matters because spatial hearing is easier to theorise once hearing is allowed to present structured distal items rather than bare acoustic features. It also helps explain why later debates about streams, events, voices, and multisensory perception developed alongside debates about location. Later authors may resist O'Callaghan's specific account, but the paper makes it difficult to treat audition as object-poor in any simple sense. | | 4 | Nudds, Matthew. "Sounds and Space." In *Sounds and Perception: New Philosophical Essays*. Oxford: Oxford University Press. | [PhilPapers](https://philpapers.org/rec/NUDSAS) | Chapter | 2009 | 105 | Nudds gives a direct treatment of auditory spatial phenomenology. The PhilPapers material indicates that the chapter develops an account of sounds as properties of sound waves while arguing that such a view can still accommodate auditory spatial phenomenology. The point is not to deny that hearing is spatial, but to deny that spatial phenomenology settles sound ontology. Later work by Kwok and Wadle shows how durable this strategy has been: one can take ordinary spatial hearing seriously without immediately accepting a strongly distal account of sounds. | | 5 | O'Callaghan, Casey. "Sounds and Events." In *Sounds and Perception: New Philosophical Essays*. Oxford: Oxford University Press, 26-49. | [PhilPapers](https://philpapers.org/rec/OCASAE) | Chapter | 2009 | 108 | This chapter is a compact defence of O'Callaghan's event ontology. He argues that sounds are neither travelling pressure waves nor mere properties of sounding objects, but events in which a medium is disturbed by objects or interacting bodies. For spatial hearing, the attraction is clear: if sounds are located at sources rather than propagating through the air as heard items, ordinary auditory phenomenology looks largely veridical rather than globally misleading. The chapter sits between the larger 2007 book and later papers on location and auditory objects. | | 6 | Sorensen, Roy. "Hearing Silence: The Perception and Introspection of Absences." In *Sounds and Perception: New Philosophical Essays*, 126-145. Oxford: Oxford University Press. | [PhilPapers](https://philpapers.org/rec/SORHST-4) | Chapter | 2009 | 81 | Sorensen gives the canonical analytic defence of the claim that silence can literally be heard. The chapter rejects the old Aristotelian thought that hearing is only of sounds, and treats silence as a case of successful absence perception rather than as a mere failure to hear. Once silence is admitted as an auditory phenomenon, questions arise about how it is individuated, located, and phenomenologically distinguished from non-auditory absence. Later disputes by Phillips, O'Callaghan, Meadows, Gow, and Skrzypulec can be read as different ways of handling the consequences of that claim. | | 7 | Nudds, Matthew. "What Are Auditory Objects?" *Review of Philosophy and Psychology* 1 (1): 105-122. | [PhilPapers](https://philpapers.org/rec/NUDWAA-3) | Article | 2010 | 75 | Nudds addresses the way auditory experience groups sequences or parts of sounds into unified streams or objects. The point is not merely empirical; auditory scene analysis becomes evidence about the structure of perceptual content. Nudds argues that auditory objects cannot simply be reduced to sounds plus post-perceptual grouping. Stream-formation belongs to the character of auditory experience itself. This bears on spatial hearing because locating, tracking, and segregating sources in space depends on there being structured auditory objects or streams to locate and follow. | | 8 | Casati, Roberto, and Jérôme Dokic. "Some Varieties of Spatial Hearing." In *Sounds and Perception: New Philosophical Essays*, 97-110. Oxford: Oxford University Press. | [PhilPapers](https://philpapers.org/rec/CASSVO-5) | Chapter | 2009 | 55 | Casati and Dokic distinguish proximal, medial, and distal theories of sound by asking where sounds are supposed to be located, and then ask what spatial hearing itself favours. Their claim, as represented in the source report, is that phenomenology tends to support distal theories if sounds, rather than merely sources, are heard as located. The chapter is useful because it treats spatial hearing as a family of issues linking sound ontology, auditory phenomenology, and the relation between heard sounds and heard sources. | | 9 | O'Callaghan, Casey. "Perceiving the Locations of Sounds." *Review of Philosophy and Psychology* 1 (1): 123-140. | [PhilPapers](https://philpapers.org/rec/OCAPTL-3) | Article | 2010 | 51 | O'Callaghan gives a direct statement of the thesis that hearing has genuine spatial content. He argues that audition is a locational mode of perception with non-trivial spatial phenomenology. He defends three claims: auditory experience itself is spatial; we hear the locations of things and events by or in hearing the locations of sounds; and sounds are experienced as having stable distal locations. The paper also sets up later resistance from wave theorists and restricted aspatialists, who deny that those phenomenological claims settle sound ontology or auditory content so straightforwardly. | | 10 | O'Callaghan, Casey. "Lessons from beyond vision." *Philosophical Studies* 153 (1): 143-160. | [PhilPapers](https://philpapers.org/rec/OCALFB) | Article | 2011 | 65 | O'Callaghan uses audition to push back against vision-centred models of perception. The paper matters for spatial hearing because it makes methodological trouble for theories that generalise too quickly from visual cases. Hearing brings out forms of object perception, spatial representation, and multimodal integration that visual-first theories can obscure. In the present corpus, this helps explain why auditory space is not just a local question in the philosophy of sound, but part of a broader anti-visuocentric reorientation in philosophy of perception. | | 11 | Matthen, Mohan. "On the Diversity of Auditory Objects." *Review of Philosophy and Psychology* 1 (1): 63-89. | [PhilPapers](https://philpapers.org/rec/MATAO) | Article | 2010 | 47 | Matthen argues that direct auditory objects are more diverse than philosophers usually suppose. They are composed of sounds, but they are not all simple sounds: melodies, harmonies, voices, phoneme sequences, and other temporally extended structures can be directly heard. This widens the range of auditory individuals that can be located, tracked, and attended to. It also helps explain why auditory scene analysis has philosophical depth: auditory objects are structured by temporal composition and attention in ways that differ from visual objects. | | 12 | O'Shaughnessy, Brian. "The Location of a Perceived Sound." In *Sounds and Perception: New Philosophical Essays*. Oxford: Oxford University Press. | [PhilPapers](https://philpapers.org/rec/OSHTLO-4) | Chapter | 2009 | 44 | The consulted PhilPapers entry did not display an abstract, but the title and its place in the 2009 volume make its role clear enough for present purposes. It is a chapter-length treatment of the location of heard sounds, and later work by O'Callaghan and Wadle is explicitly connected to it in PhilPapers' citation and similarity structure. In the context of *Sounds and Perception*, it belongs to the first-generation debate over whether hearing presents sounds, sources, or both as spatially located, and what sort of locational content auditory experience can sustain. | | 13 | Phillips, Ian. "Hearing and Hallucinating Silence." In Fiona Macpherson and Dimitris Platchias, eds., *Hallucination: Philosophy and Psychology*. Cambridge, MA: MIT Press, p. 333 ff. | [PhilPapers](https://philpapers.org/rec/PHIHA) | Chapter | 2013 | 57 | Phillips asks whether silence can be heard and whether it can be hallucinated. The abstract visible on PhilPapers presents the traditional cognitive view, according to which one does not hear silence but only hears that it is silent because one lacks auditory experience. Phillips rejects easy reliance on ordinary talk, while also criticising Sorensen's account for implying that the profoundly deaf would constantly hallucinate silence. The chapter clarifies what later silence theorists must explain: the causal, phenomenal, and epistemic conditions under which silence could count as a genuine auditory object or content. | | 14 | Casati, Roberto, Elvira Di Bona, and Jérôme Dokic. "The Ockhamization of the Event Sources of Sound." *Analysis* 73 (3): 462-466. | [PhilPapers](https://philpapers.org/rec/CASTOO) | Article | 2013 | 48 | Casati et al. argue that the standard triad of sound, event source, and thing source contains one item too many. Their proposal is to identify sounds with sound sources, or more exactly with event sources, rather than treat them as distinct entities standing in close phenomenological proximity. The attraction is partly Ockhamist simplicity, but also the thought that phenomenology does not force a distinction between sounds and their sources. For spatial hearing, the issue is sharp: if sounds just are source events, distal phenomenal location becomes easier to respect. | | 15 | Allen-Hermanson, Sean. "Introspection, Anton's Syndrome, and Human Echolocation." *Pacific Philosophical Quarterly* 98 (2): 171-192. | [PhilPapers](https://philpapers.org/rec/ALLIAS-12) | Article | 2017 | 7 | Allen-Hermanson's paper is more epistemological than ontological, but it belongs in a broad spatial-hearing corpus because it uses human echolocation to assess the reliability of introspection about perceptual experience. He argues that familiar sceptical lessons drawn from Anton's syndrome, facial vision, and echolocation are overstated. For spatial hearing, the paper shows that navigational audition and echo-based environmental awareness are not merely empirical curiosities; they bear on phenomenal character, self-knowledge, and the boundaries between sensory modalities. | | 16 | Young, Nick. "Hearing Spaces." *Australasian Journal of Philosophy* 95 (2): 242-255. | [PhilPapers](https://philpapers.org/rec/YOUHS) | Article | 2017 | 25 | Young argues that empty space can be heard. The case is reverberation in enclosed environments: when a sound reverberates, we do not merely hear an extra sound, an echo-like effect, or a changed property of the sound; we represent the surrounding volume of space itself. The paper challenges the restriction of hearing to sounds, sound-properties, or sources. It also asks what sort of indirect-belief story would be needed if space were not genuinely heard. Later work by Skrzypulec, Wilson, and Gow can be read as developing or resisting different parts of that provocation. | | 17 | Di Bona, Elvira. "Towards a Rich View of Auditory Experience." *Philosophical Studies* 174 (11): 2629-2643. | [PhilPapers](https://philpapers.org/rec/DIBTAR-2) | Article | 2017 | 40 | The PhilPapers entry presents this paper as a step toward what Di Bona later calls a rich view of audition, and related entries connect it to auditory streams, musical experience, and Gestalt-based organisation. The paper resists sparse pictures on which audition presents only low-level sounds or features. It is relevant to spatial hearing in the broad sense because richer auditory content makes room for source-hearing, stream-segregation, and environmentally structured auditory awareness. | | 18 | Di Bona, Elvira. "Listening to the Space of Music." *Rivista di Estetica* 66: 93-105. | [PhilPapers](https://philpapers.org/rec/DIBLTT) | Article | 2017 | 19 | This paper moves the spatial-hearing debate into the philosophy of music. The consulted PhilPapers result did not display an abstract, but the title, venue, and its later connections to "hearing chimeras" indicate a thesis on which musical listening can include awareness of spatially structured auditory organisation, not merely abstract tonal or temporal relations. Its role in the corpus is to widen auditory space beyond ordinary environmental source-location and into aesthetically inflected listening. | | 19 | O'Callaghan, Casey. "Hearing Properties, Effects, or Parts?" In *Beyond Vision: Philosophical Essays*, 95-120. Oxford: Oxford University Press. | [PhilPapers](https://philpapers.org/rec/OCAHPE-2) | Chapter | 2017 | 51 | O'Callaghan revisits how sounds and sources are related in experience. He rejects the idea that sounds are simply properties instantiated by sources, and also rejects simple effect-based accounts that detach sounds too far from their worldly bases. The chapter continues to defend a view on which sounds are audible individuals related to, but not reducible to, their sources. Spatially, the chapter refines the metaphysical picture needed to explain how hearing can be both source-directed and sound-directed. | | 20 | Meadows, Phillip John. "In Defense of Medial Theories of Sound." *American Philosophical Quarterly* 55 (3): 293-302. | [PhilPapers](https://philpapers.org/rec/MEAIDO-2) | Article | 2018 | 14 | Meadows defends medial theories, which identify sounds more closely with features of the medium than with distal source events. After O'Callaghan, this keeps non-distal ontology live without simply dismissing the phenomenology of hearing. The paper pairs well with Kwok's later wave-theoretic work, since both attempt to take acoustics seriously without giving up ordinary auditory phenomenology or accepting total error theory. | | 21 | Young, Nick. "Hearing Objects and Events." *Philosophical Studies* 175 (11): 2931-2950. | [PhilPapers](https://philpapers.org/rec/YOUHOA-2) | Article | 2018 | 10 | Young investigates the familiar claim that we hear source events themselves rather than merely hearing sounds and inferring their causes. The paper focuses on how hearing events relates to hearing the objects involved in those events. Its role is to clarify an ambiguity in the literature: hearing events might mean hearing an occurrence itself, hearing the event through its sound, or hearing structured interactions among objects in ways that integrate source and sound. For spatial hearing, this matters because event-hearing is one route by which audition gives us distal access to the world. | | 22 | Meadows, Phillip John. "Experiencing Silence." *Canadian Journal of Philosophy* 50 (2): 238-250. | [PhilPapers](https://philpapers.org/rec/MEAES) | Article | 2020 | 8 | Meadows revisits the silence debate by isolating three claims in the recent literature: that silence experiences are maximally negative, that silences do not cause our experiences, and that hearing silence is hearing a temporal region devoid of sound. He objects especially to the Phillips-Soteriou line and argues that its framing of silence is less secure than it appears. The paper is relevant here because silence cases force theorists to say whether auditory experience presents merely temporal gaps, spatially structured absence, or something that belongs more to cognition than perception. | | 23 | Drożdżowicz, Anna. "Bringing Back the Voice: On the Auditory Objects of Speech Perception." *Synthese*: 1-27. | [PhilPapers](https://philpapers.org/rec/DROBBT) | Article | 2020 | 9 | Drożdżowicz argues that familiar speech involves perceiving both speech sounds and the individual voice producing them, and that these appear as a unified auditory object. She proposes that such objects are temporally structured, mereologically complex individuals, and gives a psychological account of their individuation. The paper is not narrowly about spatial hearing, but it extends auditory-object theory into speech perception. Speech becomes another case in which hearing presents organised distal individuals rather than bare acoustic fragments. | | 24 | Gow, Laura. "Empty Space, Silence, and Absence." *Canadian Journal of Philosophy* 51 (7): 496-507. | [PhilPapers](https://philpapers.org/rec/GOWESS) | Article | 2021 | 12 | Gow resists a tempting assimilation: if we can see empty space and hear silence, perhaps both are simply paradigmatic cases of perceiving absences. She remains neutral on whether the experiences are genuinely perceptual, but argues that empty-space experiences and silence experiences should not straightforwardly be classified as absence experiences. This prevents the literature from treating all negative cases as interchangeable. In the present corpus, the paper helps separate auditory space, auditory silence, and absence perception. | | 25 | Skrzypulec, Błażej. "Silence Perception and Spatial Content." *Australasian Journal of Philosophy* 100 (3): 524-538. | [PhilPapers](https://philpapers.org/rec/SKRSPA-2) | Article | 2022 | 8 | Skrzypulec gives a recent defence of spatially articulated silence experience. Drawing on psychological work on auditory attention, he argues that silence experiences can have genuinely auditory phenomenal content and egocentric spatial content. On his proposal, silence can present empty directions such as left or right. The paper turns the silence debate into a debate about auditory spatial representation itself, and is already connected in the corpus to Wilson and to later work about boundaries and multisensory structure. | | 26 | Di Bona, Elvira. "Hearing Chimeras." *Synthese* 200 (3): 1-20. | [PhilPapers](https://philpapers.org/rec/DIBHC) | Article | 2022 | 7 | PhilPapers connects this paper to auditory streams, musical streams, Gestalt principles, and Di Bona's rich-view programme. The piece therefore appears to extend the thought that organised auditory experience can include perceptually unified but structurally complex auditory items, or "chimeras", that resist simple source-based description. It belongs here because spatial hearing, broadly understood, is not only about coordinate-like location; it is also about how auditory scenes are grouped, segregated, and organised into perceptual unities. | | 27 | Wilson, Keith A. "The Auditory Field: The Spatial Character of Auditory Experience." *Ergo* 9 (40): 1080-1106. | [PhilPapers](https://philpapers.org/rec/WILTAF-8) | Article | 2023 | 6 | Wilson directly challenges the thought that audition lacks anything analogous to a visual field. He argues that common objections to an auditory field are misguided and that auditory experience is richly spatial, in some ways more so than visual experience. Earlier work often asks whether sounds are spatially located; Wilson asks whether audition exhibits the bounded, structured, environmental organisation needed for a sensory field. This helps bring reverberation, silence, and the surrounding acoustic environment into a single picture. | | 28 | Pillot, Angéle, and Frédérique de Vignemont. "Feeling Presence in the Dark." *Journal of Consciousness Studies* 31 (11): 175-197. | [PhilPapers](https://philpapers.org/rec/PILFPI) | Article | 2024 | n/a | Pillot and de Vignemont argue for a distinctive mode of spatial awareness in blind individuals, which they call a sense of volume. On their account, this is not ordinary echolocation based on self-generated clicks. It depends instead on ambient sound-field variation and yields coarse locational awareness of things being present at certain distances and directions. They interpret this not as full object perception, but as a rudimentary sense of worldly presence with a tactile anticipatory character. The paper brings blindness studies, bodily anticipation, and non-objectual spatial awareness into contact with analytic debates usually framed through sound ontology. | | 29 | Kwok, Calvin K. W. "Do We Hear Compression Waves?" *Inquiry* 67 (9): 3140-3168. | [PhilPapers](https://philpapers.org/rec/KWODWH) | Article | 2024 | 1 | Kwok reopens the wave theory of sound by addressing the spatial misrepresentation objection. The objection says that if sounds are compression waves, hearing is massively illusory because ordinary experience does not represent sounds as propagating through the medium. Kwok argues instead that wave theory correctly implies that we do not hear sounds as propagating, and that this need not decide the issue against wave theory. The paper separates sound ontology from naive phenomenological expectations in a technically focused way. | | 30 | Wadle, Douglas C. "Restricted Auditory Aspatialism." *British Journal for the Philosophy of Science* 76 (1): 173-207. | [PhilPapers](https://philpapers.org/rec/WADRAA-2) | Article | 2025 | 2 | Wadle argues that the familiar phenomenal objection to auditory aspatialism is weaker than many philosophers assume. He distinguishes a minimal but recognisable notion of audition, for which the usual spatial phenomenology claim does not straightforwardly apply, from more expansive everyday notions of audition that may include multisensory elements. The paper does not simply deny that everyday hearing seems spatial. It asks whether that fact licenses the metaphysical conclusions often drawn from it, and thereby reopens first-wave disputes under better methodological conditions. | ## Thematic Synthesis The literature clusters around five overlapping debates. One debate concerns where sounds are. O'Callaghan's event theory, Nudds's property-of-wave strategy, the Casati-Dokic taxonomy of proximal, medial, and distal theories, Meadows's defence of medial theories, Kwok's renewed wave-theory defence, and Wadle's restricted aspatialism all address the same pressure: a theory of sound has to make sense of acoustic science, common talk, and auditory phenomenology without simply privileging one and discarding the others. A second debate concerns what hearing presents as its objects. Here the movement is from sparse to richer models of auditory content. Nudds and Matthen make auditory objects and streams philosophically serious; O'Callaghan extends object-perception theory to audition; Young clarifies the relation between hearing objects and hearing source events; Drożdżowicz shows how voices and speech sounds can form unified auditory objects; Di Bona pushes toward more structured auditory contents. Spatial hearing is not just hearing where a sound comes from. It includes segregating, grouping, and tracking temporally structured auditory individuals. A third debate concerns whether hearing is directly spatial. O'Callaghan's locational thesis, Young's case for hearing empty space through reverberation, Wilson's auditory-field theory, and Skrzypulec's account of spatially articulated silence all give auditory experience more spatial content than a thin detection model allows. They share the thought that auditory experience is not merely non-spatial detection supplemented by inference. They differ over what exactly is spatially represented: located sounds, source events, volumes of empty space, directional absences, or the broader acoustic environment. A fourth debate concerns absence perception and auditory limit cases. Sorensen begins by insisting that silence is genuinely heard. Phillips, O'Callaghan, Meadows, Gow, and Skrzypulec then ask what kind of claim that is. Is silence an auditory object, an absence, a temporal region, a representationally structured empty direction, or a case in which ordinary phenomenology encourages too much reification? The debate is productive because it forces accounts of audition to specify their causal, phenomenal, and intentional commitments. Silence does for audition something like what hallucination does for vision: it makes the theory show its machinery. A fifth debate concerns method. The work that carries the debate rarely relies on armchair phenomenology alone. It combines first-person phenomenological description, metaphysical argument about sounds and sources, psychoacoustics, reverberation, auditory attention, scene analysis, echolocation, and comparison with other modalities. O'Callaghan's anti-visuocentrism, Phillips's hallucination framing, Skrzypulec's use of auditory-attention psychology, and Pillot and de Vignemont's treatment of blind spatial awareness all show analytic argument being constrained by empirical work without being replaced by it. Influence in the field is concentrated but not uniform. O'Callaghan sets much of the agenda. Nudds supplies objections and alternative frameworks. Casati and Dokic provide classificatory and revisionary tools. Sorensen and Phillips make silence hard to ignore. Young extends the debate into empty space and event-hearing. Di Bona widens the conception of auditory content. Meadows and Kwok keep medial and wave-friendly theories alive. Wilson and Wadle reopen, in different ways, the question of whether audition is spatially field-like or can be minimally aspatial. ## Essential Reading List If the aim is to understand the subfield rather than merely sample it, these ten works are the place to start. O'Callaghan's *Sounds: A Philosophical Theory* (2007) systematises the ontology of sound, ties that ontology to spatial hearing, and frames later disputes over echoes, reverberation, and location. Nudds and O'Callaghan's *Sounds and Perception* (2009) gives a compact view of analytic philosophy of audition becoming a recognisable research programme. It also shows how spatiality, silence, sound ontology, and auditory objects interlock. O'Callaghan's "Perceiving the Locations of Sounds" (2010) gives a direct defence of the claim that auditory experience itself has spatial content. Later spatial-field and aspatialist debates presuppose it. Nudds's "What Are Auditory Objects?" (2010) is the entry point for understanding how auditory scene analysis becomes a philosophical claim about perceptual content rather than mere post-perceptual organisation. Casati and Dokic's "Some Varieties of Spatial Hearing" (2009) is a concise map of the ontology-phenomenology interface in spatial hearing, especially the distinction between proximal, medial, and distal theories. Sorensen's "Hearing Silence" (2009) is the axial text for the silence debate. Even if one rejects the conclusion, the later literature is difficult to understand without the problem it puts on the table. Phillips's "Hearing and Hallucinating Silence" (2013) is a useful pressure test for theories that too quickly assimilate silence to ordinary perceived objects or contents. Young's "Hearing Spaces" (2017) gives a direct argument that empty space can be heard by way of reverberation. Skrzypulec's "Silence Perception and Spatial Content" (2022) gives a recent statement of the view that silence can carry egocentric spatial content. Wilson's "The Auditory Field" (2023) is the place to start for the current explicitly spatial debate. It shifts the issue toward field structure rather than isolated location claims. ## Gaps and Open Questions One gap concerns auditory scene analysis. Philosophers now talk more comfortably about auditory objects and streams, but there is still too little systematic work on how empirical findings about segregation, grouping, continuity, masking, and source tracking should bear on theories of perceptual content, objecthood, and spatial awareness. The literature is stronger on isolated cases than on full auditory scenes. A second gap concerns the unit of auditory spatial content. Different authors treat the represented item as a sound, a source, an event, a volume, an empty direction, or a multisensory environmental structure. The field has not reached a stable taxonomy of these representational units, and some papers may talk past one another because they assume different answers to the question of what audition presents in the first instance. This remains an obstacle to convergence between distalists, wave theorists, field theorists, and restricted aspatialists. A third open question is whether ordinary auditory spatiality is unimodal or inherently multisensory. Wadle's intervention makes this especially pressing: perhaps the spatial richness cited by defenders of auditory space belongs partly to wider multisensory experience rather than to audition in a strictly minimal sense. That issue also bears on echolocation, blind navigation, and ambient-sound-based awareness of presence. The literature still lacks a stable criterion for when a spatial feature counts as auditory rather than merely co-conscious with hearing. A fourth gap is auditory epistemology. The corpus strongly suggests that hearing can provide structured access to objects, events, directions, and absences, but there is still relatively little work connecting those claims to perceptual justification, demonstrative thought, perceptual learning, or first-person authority. The explicitly epistemological work is outnumbered by metaphysical and phenomenological work. A fifth limitation is genre imbalance. PhilPapers shows a strong cluster of early book chapters, followed by a later spread across journal articles, but comparatively little book-length analytic work on auditory space after the first wave. There is room for a synoptic monograph that brings together sound ontology, auditory objects, silence, reverberation, musical space, speech, blind spatial awareness, and multisensory field theory. ## Recommended PhilPapers Queries and Filters The efficient PhilPapers strategy is to combine topic strings with category filters, then sort by relevance or citation impact. The search strings to start with are `spatial hearing`, `auditory spatial perception`, `locations of sounds`, `auditory objects`, `hearing space`, `auditory field`, `silence perception`, `human echolocation`, `sound ontology`, `wave theory of sound`, `hearing source events`, and `auditory scene analysis`. The PhilPapers categories to start with are Hearing, Sound, Spatial Experience, Philosophy of Perception, Crossmodal Perception, and, for some recent work, Representation in Cognitive Science. The Hearing and Spatial Experience browse pages are worth using because they surface recent and philosophically categorised work that generic keyword search can bury. For genre control, filter to journal articles, book chapters, and books, and exclude encyclopedia entries and dissertations if the aim is a clean analytic-philosophy literature review. For ranking, start with relevance and then manually check citation counts. Raw citation rank overweights early sound ontology and underweights newer but directly spatial papers by Wilson, Skrzypulec, Kwok, and Wadle. For year control, normalise reprints to the original publication year when PhilPapers displays both an original and a later reprint. Two concrete workflows are worth keeping. The first is the first-wave workflow: search `sound ontology`, `locations of sounds`, and `spatial hearing`, then open the entries for O'Callaghan, Nudds, Casati and Dokic, Sorensen, and O'Shaughnessy. This reconstructs the first wave of the debate. The second is the recent-wave workflow: search `hearing spaces`, `silence perception spatial content`, `auditory field`, `compression waves`, and `auditory aspatialism`. This reconstructs the current phase of the debate over how strong the spatiality of audition really is, and whether silence and reverberation should be treated as evidence rather than edge cases. ## Open Questions and Limitations The first limitation of the report is the PhilPapers-only constraint. It keeps the inquiry focused and source-disciplined, but the bibliometric picture is a picture of PhilPapers indexing and visible entry-version metadata, not a fully normalised external citation analysis. Where PhilPapers showed duplicate or reprint versions, citation counts could diverge; for that reason, the citation counts are entry-level indicators rather than corpus-wide measures. A second limitation is that some relevant PhilPapers entries do not display full abstracts on the consulted pages. In those cases, the summaries rely on visible metadata, nearby keywords, and the work's position within the PhilPapers citation and similarity structure. That does not alter the broad shape of the corpus, but it does lower confidence in the fine-grained interpretation of a handful of entries compared with the abstract-rich core.