--- key: mechanic/spatial-interfaces--t304 type: mechanic id: spatial-interfaces--t304 lang: en title: 'Breathing, pulse and biosignals' summary: >- A breathing action becomes a control signal. In Candle blowing near the microphone extinguishes a virtual flame; it measures air noise, not pulse. updatedAt: '2026-10-22' status: active url: 'https://gamemechanics.pro/en/knowledge/mechanic/spatial-interfaces--t304/' jsonUrl: >- https://gamemechanics.pro/api/v1/knowledge/en/mechanic/spatial-interfaces--t304.json markdownUrl: >- https://gamemechanics.pro/content/knowledge/en/mechanic/spatial-interfaces--t304.md aliases: [] tags: - Spatial and alternative interfaces - Mechanics and variants sourceIds: - source-917b630098115bc7 - source-92a25206afb3aea3 sources: - id: source-917b630098115bc7 title: 'Android Developers: Sensors overview' url: >- https://developer.android.com/develop/sensors-and-location/sensors/sensors_overview verifiedAt: null - id: source-92a25206afb3aea3 title: Candle - Ultra Real Blow Out url: 'https://apps.apple.com/us/app/candle-ultra-real-blow-out/id434064534?uo=4' verifiedAt: null relations: [] placements: - catalogId: spatial-interfaces id: t304 title: Spatial and alternative interfaces url: 'https://gamemechanics.pro/en/mechanics/spatial-interfaces/#t304' categoryIds: - mechanics supersededBy: [] attributes: preview: updatedAt: '2026-10-22' title: 'Breathing, pulse and biosignals' description: >- A breathing action becomes a control signal. In Candle blowing near the microphone extinguishes a virtual flame; it measures air noise, not pulse. image: src: images/mechanics/sensor-candle-0.webp width: 720 height: 1280 crop: x: 0 'y': 330 width: 720 height: 950 game: Candle - Ultra Real Blow Out sourceUrl: >- https://apps.apple.com/us/app/candle-ultra-real-blow-out/id434064534?uo=4 originalUrl: >- https://is1-ssl.mzstatic.com/image/thumb/Purple123/v4/2a/98/b9/2a98b919-8f7a-a15c-a1bc-7d52fc337ae5/mzl.fxebghmv.png/720x1440bb.jpg credit: 'Poets Road, Inc' rights: >- © Poets Road, Inc. Developer-distributed App Store screenshot. All rights reserved; excluded from MIT and CC BY 4.0. caption: 'Candle: a virtual flame reacts to blowing into the microphone' alt: 'Candle: a virtual flame reacts to blowing into the microphone' markers: - x: 50 'y': 43 label: The app maps blowing to the flame’s state tips: - >- Distinguish microphone blowing from measurements by a dedicated biometric sensor. examples: - title: Candle - Ultra Real Blow Out url: >- https://apps.apple.com/us/app/candle-ultra-real-blow-out/id434064534?uo=4 endsAt: null provenance: >- Original bilingual editorial overviews authored for gamemechanics.pro on 2026-10-20 and reviewed on 2026-10-21. Scenarios are hypothetical design examples; prototype checks describe work to perform, not completed playtests. Primary sources support the stated techniques and implementation context, not every proposed variant. license: CC-BY-4.0 codeLicense: MIT attribution: gamemechanics.pro contributors catalogKey: catalog/spatial-interfaces --- # Breathing, pulse and biosignals id: spatial-interfaces--t304 type: mechanic key: mechanic/spatial-interfaces--t304 lang: en status: active url: https://gamemechanics.pro/en/knowledge/mechanic/spatial-interfaces--t304/ A breathing action becomes a control signal. In Candle blowing near the microphone extinguishes a virtual flame; it measures air noise, not pulse. ## At a glance ![Candle: a virtual flame reacts to blowing into the microphone](https://gamemechanics.pro/images/mechanics/sensor-candle-0.webp) [Candle - Ultra Real Blow Out](https://apps.apple.com/us/app/candle-ultra-real-blow-out/id434064534?uo=4) · © Poets Road, Inc. Developer-distributed App Store screenshot. All rights reserved; excluded from MIT and CC BY 4.0. 1. The app maps blowing to the flame’s state - Distinguish microphone blowing from measurements by a dedicated biometric sensor. - [Candle - Ultra Real Blow Out](https://apps.apple.com/us/app/candle-ultra-real-blow-out/id434064534?uo=4) ## How it works Biosignal or breathing input changes a game parameter from a measured feature while preserving calibration and voluntary opt-out. ## Variants ### Mechanic variants - Breathing rhythm controls a fictional object's expansion. - Pulse input uses an actually available sensor. - Smoothing reduces random measurement jumps. - Manual substitutes preserve play without biosignals. ## Design example A virtual sail opens with a comfortable breathing rhythm that can be replaced by holding a button. Prototype check: Test consent, signal loss and personal calibration; a game indicator must not present medical conclusions. ## Context and limits Spatial and specialized input requires calibration, clear action confirmation and a way to continue after signal loss. Each overview separates player actions, state changes and alternative rules. Examples are hypothetical design scenarios, not claims about a named game. A prototype check states an observable question for the next iteration. Existing detailed references remain separately linked from the direction map. ## Connected materials ## Sources and provenance Original bilingual editorial overviews authored for gamemechanics.pro on 2026-10-20 and reviewed on 2026-10-21. Scenarios are hypothetical design examples; prototype checks describe work to perform, not completed playtests. Primary sources support the stated techniques and implementation context, not every proposed variant. - [Android Developers: Sensors overview](https://developer.android.com/develop/sensors-and-location/sensors/sensors_overview) (id: source-917b630098115bc7) - [Candle - Ultra Real Blow Out](https://apps.apple.com/us/app/candle-ultra-real-blow-out/id434064534?uo=4) (id: source-92a25206afb3aea3) CC-BY-4.0 · gamemechanics.pro contributors