Audible’s Dolby Atmos launch on March 23, 2023 covered more than 40 Audible Originals inside a catalog of more than 790,000 audio programs, which works out to about 0.005% of the catalog (Audible Atmos launch release 2023). The audience that could hear immersive spoken word is vastly larger: 58% of Americans aged 12 and older consume podcasts monthly (Edison Research, The Infinite Dial 2026), 58% of US adults have listened to an audiobook (Audio Publishers Association, 2026 Consumer Survey), and global true wireless earbud shipments reached 78.3 million units in a single quarter (Canalys, Q1 2025). The research on whether 3D sound actually deepens immersion in spoken word is split, with one 50-person experiment favoring binaural and a 77-person radio study finding no gain. We aggregated data from Edison Research, the Audio Publishers Association, Apple, ACX, the EBU, the ITU, Qualcomm, Futuresource Consulting, Canalys, and peer-reviewed studies in Media Psychology, PLoS ONE and the AES convention proceedings. For the broader device and music picture, see our spatial audio statistics; this roundup stays on podcasts, audiobooks and audio drama production.
TL;DR
- More than 40 Audible Originals launched in Dolby Atmos, against a catalog of more than 790,000 programs (Audible Atmos launch release 2023).
- 58% of Americans 12+ are monthly podcast consumers, an estimated 167 million (Edison Research, The Infinite Dial 2026).
- US audiobook sales reached $2.43 billion in 2025, up 9% (Audio Publishers Association, 2025 Sales Survey).
- Apple’s Dolby Atmos deliverables must not exceed -18 LKFS integrated loudness and -1 dB TP (Apple Video and Audio Asset Guide).
- ACX audiobooks must sit between -23 dB and -18 dB RMS with a -60 dB RMS noise floor (ACX Audio Submission Requirements).
- Global true wireless earbud shipments hit 78.3 million in Q1 2025, up 18% (Canalys, reported by MacRumors).
- Only 26% of smartphone users named podcasts as desired spatial audio content, last of six categories (Qualcomm State of Sound Report 2022).
- Binaural audio stories beat stereo on narrative imagery, engagement and information recognition in a 50-person experiment (Rodero and Rodríguez-de-Dios, Media Psychology 2024).
- Binaural and monaural radio features scored 4.12 vs 4.05 on perceptual immersion, a non-significant gap (Vicente and Pérez-Seijo, Profesional de la información 2022).
- World-fixed virtual sounds were externalized 65% of the time vs 20% for head-fixed ones (Brimijoin and colleagues, PLoS ONE 2013).
1. The Spoken-Word Audience Immersive Audio Could Reach
Immersive spoken word does not have an audience problem. Four in five Americans aged 12 and older (80%) have now listened to or watched a podcast, an estimated 230 million people (Edison Research, The Infinite Dial 2026), and the audiobook side is still adding revenue. The gap this roundup documents is on the supply side: the people are there, the spatial catalog is not.
The most relevant number for immersive producers is the ‘Audio First’ category, meaning works created to be heard rather than adapted from print. That is where multi-cast audio drama, sound design and Atmos mixes live, and its revenue grew 50% in a single year. Audiobook figures come from the APA 2026 consumer and 2025 sales survey announcement.
| Metric | Value | Source |
|---|---|---|
| Americans 12+ who have ever listened to or watched a podcast | 80% (estimated 230 million) | Edison Research, The Infinite Dial 2026 |
| Americans 12+ who consume podcasts monthly | 58% (estimated 167 million) | Edison Research, The Infinite Dial 2026 |
| US adults 18+ who have ever listened to an audiobook | 58% (estimated 157 million) | Audio Publishers Association, 2026 Consumer Survey |
| US audiobook sales revenue in 2025 | $2.43 billion, 9% over the previous year | Audio Publishers Association, 2025 Sales Survey |
| Active audiobook titles reported by publishers in 2025 | Over 750,000, up 43% from 2024 | Audio Publishers Association, 2025 Sales Survey |
| Revenue from ‘Audio First’ publications (works created for audio) | $136 million in 2025, up 50% from $91.1 million; 6% of total net revenue | Audio Publishers Association, 2025 Sales Survey |
Context: the podcast figures cover Americans aged 12 and older surveyed in January 2026, while the audiobook consumer survey covers adults 18 and older surveyed in February 2026 (1,706 respondents), so the two populations are not directly comparable.
2. Immersive Catalogs and Platform Support for Podcasts and Audiobooks
Spatial spoken word has been launched several times, always as a curated shelf rather than a catalog-wide format. Dividing Audible’s launch collection by its total catalog (40 / 790,000) gives about 0.005%, and because both numbers are stated as “more than”, treat that as an order of magnitude, not a precise share. The same pattern repeats at Wondery, where Atmos sat behind a subscription tier inside an app of more than 15,000 episodes.
Dolby itself still frames podcasts as an emerging category. Its fiscal 2025 annual report describes the company as “innovating in emerging categories like user-generated content, sports and podcasts” and notes “strong global momentum in user-generated content, audio books, and live sports” (Dolby Laboratories, Form 10-K fiscal 2025), without disclosing any title counts. Catalog figures below are the companies’ own claims, from the Audible Atmos launch release and the Wondery Atmos launch release, both published with Dolby.
| Metric | Value | Source |
|---|---|---|
| Audible Originals in the Dolby Atmos launch collection (March 23, 2023) | More than 40 | Audible Atmos launch release 2023 (company claim) |
| Audio programs in Audible’s full catalog at that launch | More than 790,000 | Audible Atmos launch release 2023 (company claim) |
| Atmos launch titles as a share of Audible’s catalog (our calculation: 40 / 790,000) | About 0.005% | Derived from Audible Atmos launch release 2023 |
| Dolby Atmos audiobook titles a German trade outlet found in the Audible app at launch | 12 titles, all in English | hifi.de, March 24, 2023 |
| Countries where Wondery offered Dolby Atmos podcasts through Wondery+ (May 9, 2022) | Over 28 | Wondery Atmos launch release 2022 (company claim) |
| Episodes in the Wondery app when Atmos launched (Atmos limited to selected shows) | Over 15,000 | Wondery Atmos launch release 2022 (company claim) |
| Shows on Podeo, an Arabic-language podcast app that integrated Dolby Atmos (October 1, 2024) | 4M+ shows | Podeo press release 2024, via Podnews (company claim) |
Most recent available data: Audible, 2023; Wondery, 2022. Neither company has published an updated Atmos title count since, and the independent check by hifi.de shows how much smaller the collection looked in a non-English storefront. The Podeo release gives a show count for the whole app, not for Atmos titles.
3. Delivery Specs: Loudness Targets and File Formats for Spoken Word and Atmos
Spoken-word producers mastering in Atmos work to two rulebooks at once. Loudness is measured in LKFS or LUFS (the same unit under two names: loudness relative to digital full scale), and “true peak” is the highest level the waveform reaches after conversion back to analog. Apple Podcasts wants about -16 dB LKFS for a standard episode, while Apple’s Dolby Atmos delivery spec caps integrated loudness at -18 LKFS, so an immersive master is expected to sit about 2 dB quieter than the stereo podcast norm.
The Atmos file itself is not an audio track in the usual sense. ADM, the Audio Definition Model, is a metadata standard that describes where each sound object sits in space, wrapped in a Broadcast Wave file. Apple’s Dolby Atmos asset requirements also reject Atmos files “generated from mono or stereo mixes”, which closes the door on simply upmixing an existing stereo podcast. Podcast feed rules come from Apple Podcasts Audio Requirements, which list MP3 or AAC for RSS feeds and WAV, FLAC or MP3 for subscriber audio, with no spatial format among them.
| Metric | Value | Source |
|---|---|---|
| Apple Podcasts overall loudness target and true-peak ceiling | Around -16 dB LKFS (+/- 1 dB tolerance); true peak no higher than -1 dB FS | Apple Podcasts for Creators, Audio Requirements |
| Apple Dolby Atmos deliverables: maximum integrated loudness and true peak | -18 LKFS and -1 dB TP, measured per ITU-R BS.1770-4 | Apple Video and Audio Asset Guide, Dolby Atmos |
| Apple Dolby Atmos deliverables: file format and resolution | BWF ADM file, 24-bit LPCM at 48 kHz or 96 kHz | Apple Video and Audio Asset Guide, Dolby Atmos |
| ACX audiobook volume window (RMS is the average signal level) | Between -23 dB and -18 dB RMS, peaks no higher than -3 dB | ACX Audio Submission Requirements |
| ACX audiobook noise floor (level of background hiss between words) | No higher than -60 dB RMS | ACX Audio Submission Requirements |
| ACX audiobook file format and length | 192 kbps or higher CBR, 44.1 kHz MP3; each file 120 minutes or less | ACX Audio Submission Requirements |
| AES TD1008 streaming loudness for speech vs music vs mixed content | -18 LUFS speech, -16 LUFS music, -17 LUFS mixed | AES TD1008, as summarized by Telos Alliance |
Context: broadcast drama in Europe still targets an average programme loudness of -23 LUFS under EBU R 128, now at version 5.0 (November 2023). The measurement algorithm behind every number above is ITU-R BS.1770, whose in-force edition is BS.1770-5 (November 2023), and ADM itself is ITU-R BS.2076, revised to BS.2076-3 in February 2025; the Atmos asset guide still cites BS.1770-4. The TD1008 figures come from the Telos Alliance summary, because the AES document page blocked automated access. For how platforms normalize these targets in playback, see our streaming loudness normalization statistics.
4. Listener Hardware: Headphones, Earbuds and Head Tracking
Spatial podcasts are a headphone format first, and the headphone base is already large. 59% of Americans aged 12 and older own Bluetooth-enabled wireless headphones, an estimated 170 million people (Edison Research, The Infinite Dial 2025), a share Radio World describes as fairly flat over the last three years. Ownership is near saturation; the open question is how many of those devices can track head movement.
That is where the market narrows. Head tracking, which keeps a virtual voice anchored in the room when the listener turns, is still sold as a premium differentiator: Canalys data reported by MacRumors lists “spatial audio with dynamic head tracking” among the features that set the market leader’s earbuds apart.
| Metric | Value | Source |
|---|---|---|
| Americans 12+ who own Bluetooth-enabled wireless headphones (January 2025) | 59% (estimated 170 million) | Edison Research, The Infinite Dial 2025 |
| Global true wireless (TWS) earbud shipments, Q1 2025 | 78.3 million units, up 18% year over year | Canalys, reported by MacRumors, May 21, 2025 |
| Market leader Apple’s share of global TWS earbud shipments, Q1 2025 | 23.3% (18.2 million units, up 12% year over year) | Canalys, reported by MacRumors, May 21, 2025 |
| In-car Dolby Atmos for music, audiobooks and podcasts in existing vehicles | Rendered over 4 channels; pricing from $1,300 (Pioneer’s own claim) | Pioneer SPHERA announcement, January 5, 2026 |
Context: the headphone percentage is confirmed in Radio World’s coverage of the same survey. The car is the next frontier: Pioneer’s SPHERA announcement notes that in-vehicle Atmos was previously limited to cars with factory Atmos sound systems. Earbud isolation also shapes how spatial cues land; see our TWS earbud active noise cancellation statistics.
5. Consumer Demand for Spatial Audio, and Where Podcasts Rank
Awareness of spatial audio is high, but listeners associate it with music and film, not talk. Only 26% of smartphone users named podcasts as content they want in spatial audio, the lowest of six categories and less than half the 62% who named music (Qualcomm State of Sound Report 2022). For podcast producers, that means demand has to be created by the content, not assumed from the format.
The more recent Futuresource survey shows that once people know what spatial audio is, most have tried it, and four in ten want it supported in future purchases (Futuresource Consulting, immersive audio consumer study 2024).
| Metric | Value | Source |
|---|---|---|
| Smartphone users aware of spatial audio | 73% | Qualcomm State of Sound Report 2022 |
| Users for whom spatial audio would influence their next true wireless earbud purchase | 56% (16% extremely likely, 40% likely) | Qualcomm State of Sound Report 2022 |
| Users who would pay more for spatial audio | 41% | Qualcomm State of Sound Report 2022 |
| Podcasts as desired spatial audio content, vs music | 26% for podcasts vs 62% for music (base: 6,000 smartphone users) | Qualcomm State of Sound Report 2022 |
| Respondents aware of spatial audio who have already listened to spatial content | 83% | Futuresource Consulting 2024 (June 2024 survey) |
| Respondents who say it is important that future audio purchases support spatial audio | 40% | Futuresource Consulting 2024 (June 2024 survey) |
Most recent available data: Qualcomm State of Sound Report, 2022. The Futuresource survey covered more than 10,000 audio hardware owners in the USA, UK, Germany, Japan and China; it did not publish a podcast-specific figure.
6. Research on Immersion: Binaural and Multichannel vs Stereo Storytelling
Peer-reviewed evidence on spatial spoken word is thin and points in different directions. The strongest positive result comes from a 50-participant experiment in which binaural versions of audio stories achieved higher narrative imagery, engagement and information recognition than the stereo versions, with heart rate and skin conductance showing the highest attention and arousal in binaural (Rodero and Rodríguez-de-Dios, Media Psychology 2024). Binaural here means a two-channel recording or render that reproduces how sound reaches each ear, for headphone listening.
Two other studies found no measurable gain. A Portuguese radio experiment comparing binaural and monaural journalism features found nearly identical immersion scores (Vicente and Pérez-Seijo, Profesional de la información 2022), and an AES convention paper comparing a 7.1.4 immersive mix of a story to its stereo fold-down found no significant differences on self-report or physiological measures (Sochaczewska, Lee and Dewey, AES 157th Convention 2024). The takeaway: spatial sound alone does not guarantee immersion; how the story uses space seems to matter more than the format flag.
| Metric | Value | Source |
|---|---|---|
| Participants in a binaural vs stereo audio-story experiment | 50 | Rodero and Rodríguez-de-Dios, Media Psychology 2024 |
| Outcome of binaural vs stereo audio stories | Binaural higher on narrative imagery, engagement and information recognition | Rodero and Rodríguez-de-Dios, Media Psychology 2024 |
| Participants in a binaural vs monaural radio journalism experiment | 77 (40 binaural, 37 monaural) | Vicente and Pérez-Seijo, Profesional de la información 2022 |
| Mean perceptual immersion score, binaural vs monaural | 4.12 vs 4.05; t(75) = .414, p > .05 | Vicente and Pérez-Seijo, Profesional de la información 2022 |
| Mean place illusion score (feeling of being in the place), binaural vs monaural | 3.82 vs 3.86; no significant difference | Vicente and Pérez-Seijo, Profesional de la información 2022 |
| Mean narrative immersion score, binaural vs monaural | 3.90 vs 3.93; no significant difference | Vicente and Pérez-Seijo, Profesional de la información 2022 |
| Narrative engagement with a 7.1.4 immersive mix vs its stereo fold-down | No significant differences in subjective or objective measures | Sochaczewska, Lee and Dewey, AES 157th Convention 2024 |
| Journal articles on binaural sound in audio and radio journalism, January 2013 to December 2023 | 6 | Paiva, Radio Journal 2024 (systematic review) |
Context: the Paiva systematic review searched Web of Science and Scopus and concluded that research on binaural journalism is limited. Abigail Wincott’s research with programme-makers across several countries over five years points to why production stays rare: makers use spatial sound less often than they would like because of cultural patterns in radio and podcast production (Wincott, Radio Journal 2026, in press). The AES paper did not report its sample size on the public abstract page.
7. Head Tracking and Externalization: Why Sound Leaves the Head
“Externalization” is the perception that a sound comes from a point outside your head, as a real voice in a room does, instead of from inside it, which is the default on ordinary headphones. It is the perceptual payoff spatial podcasts promise. In a headphone experiment, virtual sounds held fixed relative to the world were externalized 65% of the time, against 20% for sounds that moved with the head (Brimijoin and colleagues, PLoS ONE 2013). That is the mechanism head tracking exploits.
A 2024 preprint adds a gradient across rendering methods: head-tracked (“dynamic”) binaural produced the fewest inside-the-head reports, static binaural more, and diotic playback (the identical signal sent to both ears, like a mono podcast on earbuds) the most (Hoppe, van de Par, Flanagin and Ewert, arXiv 2024). The authors caution that the rendering differences were not statistically significant, although they observed a clear trend.
| Metric | Value | Source |
|---|---|---|
| Headphone virtual sources externalized: fixed relative to the world vs fixed relative to the head | 65% vs 20% | Brimijoin and colleagues, PLoS ONE 2013 |
| Frontal loudspeaker sounds externalized: moving with the head vs staying fixed | 23% vs 63% | Brimijoin and colleagues, PLoS ONE 2013 |
| Listeners in the two experiments (all with self-reported normal hearing, aged 25 to 45) | 11 in experiment 1, 6 in experiment 2 | Brimijoin and colleagues, PLoS ONE 2013 |
| Sounds perceived inside or at the head with head-tracked (dynamic) binaural rendering | 5.68% +/- 3.02% | Hoppe and colleagues, arXiv 2024 |
| Sounds perceived inside or at the head with static binaural rendering | 17.10% +/- 7.30% | Hoppe and colleagues, arXiv 2024 |
| Sounds perceived inside or at the head with diotic (same signal to both ears) rendering | 32.45% +/- 4.27% | Hoppe and colleagues, arXiv 2024 |
| Listeners in the 2024 externalization study | 10 normal-hearing listeners aged 23 to 32 | Hoppe and colleagues, arXiv 2024 |
Most recent available data: Brimijoin and colleagues, 2013; it remains a standard reference for the head-movement effect. The Hoppe study is a preprint (August 26, 2024) with a small sample, and both studies used lab rendering rather than consumer earbuds, so treat the percentages as evidence of direction, not as what a podcast listener on everyday earbuds will experience.
Summary: Spatial Audio and Dolby Atmos Podcast Production by the Numbers
| Metric | Value | Source |
|---|---|---|
| Americans 12+ who are monthly podcast consumers | 58% (estimated 167 million) | Edison Research, The Infinite Dial 2026 |
| US adults 18+ who have listened to an audiobook | 58% (estimated 157 million) | Audio Publishers Association, 2026 Consumer Survey |
| US audiobook sales revenue, 2025 | $2.43 billion, up 9% | Audio Publishers Association, 2025 Sales Survey |
| Atmos launch titles as a share of Audible’s catalog (40 / 790,000) | About 0.005% | Derived from Audible Atmos launch release 2023 |
| Countries where Wondery offered Atmos podcasts | Over 28 | Wondery Atmos launch release 2022 |
| Apple Dolby Atmos maximum integrated loudness and true peak | -18 LKFS, -1 dB TP | Apple Video and Audio Asset Guide |
| ACX audiobook volume window | -23 dB to -18 dB RMS | ACX Audio Submission Requirements |
| ACX audiobook noise floor | No higher than -60 dB RMS | ACX Audio Submission Requirements |
| Global TWS earbud shipments, Q1 2025 | 78.3 million, up 18% | Canalys, via MacRumors |
| Smartphone users naming podcasts as desired spatial content | 26% (music: 62%) | Qualcomm State of Sound Report 2022 |
| Respondents aware of spatial audio who have listened to it | 83% | Futuresource Consulting 2024 |
| Participants in binaural vs stereo story experiment (binaural won on engagement) | 50 | Rodero and Rodríguez-de-Dios, Media Psychology 2024 |
| Perceptual immersion, binaural vs monaural radio features | 4.12 vs 4.05, p > .05 | Vicente and Pérez-Seijo 2022 |
| Externalization, world-fixed vs head-fixed headphone sources | 65% vs 20% | Brimijoin and colleagues, PLoS ONE 2013 |
| Inside-the-head perception, head-tracked binaural vs diotic | 5.68% vs 32.45% | Hoppe and colleagues, arXiv 2024 |
Methodology and Sources
- Edison Research, The Infinite Dial 2026 presentation (n = 2,050, January 2026) and The Infinite Dial 2025 report (n = 5,020, January 2025): podcast reach and headphone ownership.
- Radio World, coverage of the 2025 audio consumer survey: headphone ownership percentage.
- Audio Publishers Association, 2026 Consumer and 2025 Sales Surveys: revenue, titles, Audio First, listener reach.
- Audible Atmos launch release 2023: Atmos launch collection and catalog size.
- Wondery Atmos launch release 2022: Atmos podcasts on Wondery+.
- Dolby Laboratories, Form 10-K fiscal 2025: podcasts and audiobooks as emerging Atmos categories.
- hifi.de, Audible Dolby Atmos launch check 2023: independent title count in the German app.
- Podeo press release via Podnews 2024: Dolby Atmos on an Arabic-language podcast app.
- Apple Podcasts for Creators, Audio Requirements and Apple Video and Audio Asset Guide, Dolby Atmos: podcast loudness and formats, Atmos loudness and ADM file rules.
- ACX Audio Submission Requirements: audiobook volume, peak, noise floor, file format.
- EBU R 128, ITU-R BS.1770 and ITU-R BS.2076: loudness and Audio Definition Model standards and versions.
- Telos Alliance, Understanding Loudness for Streaming Audio: summary of AES TD1008 targets.
- Canalys Q1 2025 TWS data, reported by MacRumors: earbud shipments and market leader share.
- Pioneer, SPHERA announcement 2026: in-car Atmos for podcasts and audiobooks (vendor claim).
- Qualcomm State of Sound Report 2022: spatial audio awareness and desired content, N = 6,000.
- Futuresource Consulting, immersive audio consumer study 2024: spatial listening and purchase importance.
- Rodero and Rodríguez-de-Dios, Media Psychology 2024: binaural vs stereo audio stories.
- Vicente and Pérez-Seijo, Profesional de la información 2022: binaural vs monaural radio journalism.
- Sochaczewska, Lee and Dewey, AES 157th Convention 2024: 7.1.4 vs stereo narrative engagement.
- Paiva, Radio Journal 2024: systematic review of binaural journalism research.
- Wincott, Radio Journal 2026 (in press): barriers to spatial audio in factual production.
- Brimijoin and colleagues, PLoS ONE 2013: head movement and externalization.
- Hoppe, van de Par, Flanagin and Ewert, arXiv 2024: externalization by headphone rendering method.
- Data watch: no platform publishes a current count of Dolby Atmos podcasts or audiobooks, so the catalog figures in section 2 are launch-day company claims from 2022 and 2023, and the 0.005% share is our approximate calculation from two “more than” figures. The text extracted from the 2025 headphone slide showed a different percentage series than Radio World’s 59%; we report 59% because Radio World quotes it directly from the survey. The two audience bases in section 1 differ (12+ vs 18+). The spatial demand data in section 5 is from 2022 and the head-movement externalization data in section 7 from 2013; the 2024 externalization study is an unreviewed preprint. The research in sections 6 and 7 uses small samples (6 to 77 people per experiment) and the results conflict, so no single study should be read as settled. Canalys Q1 2025 figures are cited through MacRumors because the original release was not reachable, and the AES TD1008 targets through the Telos Alliance summary for the same reason.
Last updated: November 7, 2026. We update this roundup quarterly, and the next refresh is expected when Edison Research releases The Infinite Dial 2027.