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chew [2019/01/18 22:00] – yair | chew [2019/01/18 23:27] (current) – yair |
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| <blockquote> |
| "Bone conduction is not a new discovery. \\ |
<blockquote>"Bone conduction is not a new discovery. \\ | Ludwig Van Beethoven overcame deafness by biting a metal rod attached to his piano to hear his work." [[https://www.ksat.com/health/chew-on-this-hearing-device-for-the-mouth|source]] |
Ludwig Van Beethoven overcame deafness by biting a metal rod attached to his piano to hear his work." [[https://www.ksat.com/health/chew-on-this-hearing-device-for-the-mouth|source]]</blockquote> | </blockquote> |
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can we use bone conduction to pick up chewing sounds and can we process and categorize them into something | can we use bone conduction to pick up chewing sounds and can we process and categorize them into something |
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=== recording technique === | === recording techniques === |
| we found several different methods of recording chewing sounds. listed below |
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<blockquote>A two component system was devised for recording and analyzing chewing sounds | <blockquote>A two component system was devised for recording and analyzing chewing sounds |
the subject chewed a 3 g portion of peanuts. | the subject chewed a 3 g portion of peanuts. |
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{{:pasted:20190118-181226.png?0x350}} {{:pasted:20190118-195118.png?0x350}} | {{:pasted:20190118-181226.png?0x300}} {{:pasted:20190118-195118.png?0x300}} |
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<cite>"frequency spectrographic analysis of bone conducted chewing sounds in persons with natural and artificial dentitions" ({{::kapur1971.pdf |1971}})</cite> | <cite>"frequency spectrographic analysis of bone conducted chewing sounds" ({{::kapur1971.pdf|1971}})</cite> |
</blockquote> | </blockquote> |
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AKG C414EB (frequency band: 20-20,000 Hz) held on the other side of the subject’s head. The diaphragm of the microphone was in front of the ear canal | AKG C414EB (frequency band: 20-20,000 Hz) held on the other side of the subject’s head. The diaphragm of the microphone was in front of the ear canal |
opening at 8 cm. | opening at 8 cm. |
<cite>"contribution of air-and bone-conduction to the creation of sounds perceived during sensory evaluation of foods" ({{::dacremont1991.pdf |1991}})</cite> | |
| <cite>"contribution of air-and bone-conduction to the creation of sounds perceived during sensory evaluation of foods" ({{::dacremont1991.pdf|1991}})</cite> |
</blockquote> | </blockquote> |
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{{:pasted:20190118-154431.png?400}} | {{:pasted:20190118-154431.png?400}} |
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<cite>"the role of auditory cues in modulating the perceived crispness and staleness of potato chips" ({{::zampini2004.pdf |2004}})</cite> | <cite>"the role of auditory cues in modulating the perceived crispness and staleness of potato chips" ({{::zampini2004.pdf|2004}})</cite> |
</blockquote> | </blockquote> |
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currently a homebrew pickup\piezo pickup microphone seems the best bet. | currently a homebrew pickup\piezo pickup microphone seems the best bet. |
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[[https://www.aliexpress.com/wholesale?catId=63705&initiative_id=AS_20190106125155&SearchText=bone+conduction|AliExpress sellers]] of bone conduction headphones/microphnes bluetooth headsets | [[https://www.aliexpress.com/wholesale?catId=63705&initiative_id=AS_20190106125155&SearchText=bone+conduction|AliExpress sellers]] of bone conduction headphones/microphones bluetooth headsets might also be interesting to test. |
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| the [[https://research.miyashita.com/papers/I35|"unlimited gum"]] piezo based prototype offers some interesting quotes |
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=== Audio Processing === | === Audio Processing === |
[[https://www.analyticsvidhya.com/blog/2018/01/10-audio-processing-projects-applications/|]] | [[https://www.analyticsvidhya.com/blog/2018/01/10-audio-processing-projects-applications/|]] |