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chew [2019/01/18 20:17] yairchew [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>
  
 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
  
-===articles=== +=== recording techniques === 
-  *{{ ::dacremont1991.pdf |"contribution of air-and bone-conduction to the creation of sounds perceived during sensory evaluation of foods"}} +we found several different methods of recording chewing sounds. listed below
-  *{{ ::zampini2004.pdf |"the role of auditory cues in modulating the perceived crispness and staleness of potato chips"}} +
-  *{{ ::roudaut2002.pdf |"Crispness: a critical review on sensory and material science approaches"}} +
-  *{{ ::amft2005.pdf |"Analysis of Chewing Soundsfor Dietary Monitoring"}} +
-  *{{ ::huang2004.pdf |"Artificial senses for characterization of food quality"}} +
-  *{{ ::spence2015.pdf |"Eating with our ears"}} +
-  *{{ ::kapur1971.pdf |"frequency spectrographic analysis of bone conducted chewing sounds in persons with natural and artificial dentitions"}} +
-[[https://scholar.google.co.il/scholar?cites=10624021506786852239&as_sdt=2005&sciodt=0,5&hl=en|scholar related articles]] +
- +
-=== recording technique ===+
  
 <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
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 of a test food for 10 strokes. The signal was fed through an amplifier and recorded of a test food for 10 strokes. The signal was fed through an amplifier and recorded
 on a in. magnetic tape in a tape recorder* run at a speed of 3¾ inch per sec. The sounds on a in. magnetic tape in a tape recorder* run at a speed of 3¾ inch per sec. The sounds
-were also monitored with earphones by the investigator. +were also monitored with earphones by the investigator. \\ 
 +[...]\\ 
 +Three bony areas (center of the forehead, mastoid process and lower border of the mandible towards its angle) were 
 +chosen to establish, if possible, a single satisfactory and reliable landmark for picking 
 +up chewing sounds. The pick-up needle was gently pushed through the skin to rest 
 +on the bony surface at a point that was free of muscle attachment and had a relatively 
 +thin tissue cover. This point was established by palpating the area while the subject 
 +was asked to clench his teeth and relax. The pick-up device was held in place with a 
 +rubber cuff. The sounds were recorded separately from each of the three sites while 
 +the subject chewed a 3 g portion of peanuts
  
-{{:pasted:20190118-181226.png?400}}+{{:pasted:20190118-181226.png?0x300}} {{:pasted:20190118-195118.png?0x300}}
  
-<cite>frequency spectrographic analysis of bone conducted chewing sounds in persons with natural and artificial dentitions</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"</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}}
  
-<cite>"the role of auditory cues in modulating the perceived crispness and staleness of potato chips"</cite>+<cite>"the role of auditory cues in modulating the perceived crispness and staleness of potato chips" ({{::zampini2004.pdf|2004}})</cite>
 </blockquote> </blockquote>
-===hardware=== 
  
  
-{{:pasted:20190117-161122.png?300}}+===articles===
  
 +  *{{ ::kapur1971.pdf |"frequency spectrographic analysis of bone conducted chewing sounds in persons with natural and artificial dentitions" (1971)}}
 +  *{{ ::dacremont1991.pdf |"contribution of air-and bone-conduction to the creation of sounds perceived during sensory evaluation of foods" (1991)}}
 +  *{{ ::roudaut2002.pdf |"Crispness: a critical review on sensory and material science approaches" (2002)}}
 +  *{{ ::zampini2004.pdf |"the role of auditory cues in modulating the perceived crispness and staleness of potato chips" (2004)}}
 +  *{{ ::huang2004.pdf |"Artificial senses for characterization of food quality" (2004)}}
 +  *{{ ::amft2005.pdf |"Analysis of Chewing Soundsfor Dietary Monitoring" (2005)}}
 +  *{{ ::spence2015.pdf |"Eating with our ears" (2015)}}
 +[[https://scholar.google.co.il/scholar?cites=10624021506786852239&as_sdt=2005&sciodt=0,5&hl=en|scholarly related articles]]
 +
 +===hardware===
 +
 +{{:pasted:20190117-161122.png?300}}
  
 currently a homebrew pickup\piezo pickup microphone seems the best bet.  currently a homebrew pickup\piezo pickup microphone seems the best bet. 
  
-[[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. 
 + 
 +the [[https://research.miyashita.com/papers/I35|"unlimited gum"]] piezo based prototype offers some interesting quotes 
  
 === 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/|]]