Natural soundscapes span infrasound to ultrasound and co\u2011organize living systems. A cross\u2011disciplinary evidence chain now supports two complementary pathways by which organized sound modulates indoor human–microbiome outcomes. Host pathway: slow 2–8 Hz rhythmic scaffolds entrain respiration and the autonomic nervous system, yielding higher nightly HRV (RMSSD) and more stable sleep; via the cholinergic anti\u2011inflammatory reflex, improved vagal tone shifts gut barrier, motility, and immune tone, biasing gut\u2011microbiome niches (alpha\u2011diversity and SCFAs). Exposure pathway: audible acoustics—especially 1–3 kHz—drive acoustic agglomeration and near\u2011wall acoustic streaming; particle statistics (d50/CMD) increase, PM2.5 falls, and settling/filtration rise. Together with material\u2011layer chemistry/roughness (asphalt, concrete, glass, metals; VOC backgrounds), this rewires what reaches the breathing zone and alters the biological composition of inhaled air (pollen, fungal spores, bacteria vs mineral dust). Urban “spectrum disruptors” (broadband noise, heat\u2011island refraction, RF clutter) mask natural bands and dilute biophony; wildlife routing (e.g., bats, 20–110+ kHz) and façade materials further shape indoor exposure profiles.
\nEchoFilm restores a safety\u2011capped, full\u2011spectrum window\u2011to\u2011nature indoors (audible bands plus an optional ecological ultrasound cue, never as a microbe\u2011level actuator) while logging air (APS/OPC size spectra, VOCs, 16S/ITS bioaerosols, polarization/depolarization typing) and human physiology (nightly HRV). We specify one proof\u2011of\u2011closure trial (Full vs ANC\u2011only vs Eco\u2011placebo; equal\u2011loudness) that demonstrates both pathways in the same homes. Primary endpoints couple HRV/sleep with airborne biological diversity (not just mass); a materials panel links boundary\u2011layer acoustics to near\u2011wall exposure. The framework unifies physics (agglomeration, boundary layers), biology (microbiome, biophony), and indoor environmental engineering (IAQ, optics) into one actionable, testable synthesis.
", "publication_date": "2025-10-14", "publisher": "Zenodo", "resource_type": { "id": "publication-proposal", "title": { "de": "Antrag", "en": "Proposal" } }, "rights": [ { "description": { "en": "The Creative Commons Attribution license allows re-distribution and re-use of a licensed work on the condition that the creator is appropriately credited." }, "icon": "cc-by-icon", "id": "cc-by-4.0", "props": { "scheme": "spdx", "url": "https://creativecommons.org/licenses/by/4.0/legalcode" }, "title": { "en": "Creative Commons Attribution 4.0 International" } } ], "subjects": [ { "subject": "soundscape; acoustic agglomeration; bioaerosols; HRV; sleep; microbiome; boundary layer; indoor air; optics of biological particles; polarization; RF/biophony/bats; built environment; materials; VOCs" } ], "title": "EchoFilm \u2014 An Integrated Evidence Chain: Sound \u00d7 Dust \u00d7 Human (Urban Rooms & Space Habitats)" }, "parent": { "access": { "owned_by": { "user": "1378779" }, "settings": { "accept_conditions_text": null, "allow_guest_requests": false, "allow_user_requests": false, "secret_link_expiration": 0 } }, "communities": {}, "id": "17349742", "pids": { "doi": { "client": "datacite", "identifier": "10.5281/zenodo.17349742", "provider": "datacite" } } }, "pids": { "doi": { "client": "datacite", "identifier": "10.5281/zenodo.17349743", "provider": "datacite" }, "oai": { "identifier": "oai:zenodo.org:17349743", "provider": "oai" } }, "revision_id": 3, "stats": { "all_versions": { "data_volume": 1840005.0, "downloads": 31, "unique_downloads": 26, "unique_views": 15, "views": 16 }, "this_version": { "data_volume": 1840005.0, "downloads": 31, "unique_downloads": 26, "unique_views": 15, "views": 16 } }, "status": "published", "swh": {}, "updated": "2025-10-14T12:16:13.645258+00:00", "versions": { "index": 1, "is_latest": true } }