Differences
This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision Next revisionBoth sides next revision | ||
chew [2019/01/18 19:29] – yair | chew [2019/01/18 22:02] – yair | ||
---|---|---|---|
Line 1: | Line 1: | ||
+ | < | ||
+ | "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:// | ||
+ | </ | ||
+ | can we use bone conduction to pick up chewing sounds and can we process and categorize them into something | ||
- | < | + | === recording technique === |
- | Ludwig Van Beethoven overcame deafness by biting a metal rod attached to his piano to hear his work." [[https:// | + | |
+ | < | ||
+ | conducted through the bone. A specially designed 0.0005 in. thick stainless steel needle | ||
+ | mounted on a phonograph cartridge (Figure 1) was found to be most reliable for | ||
+ | picking up vibrations from bony surfaces while a subject chewed a standard portion | ||
+ | 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 | ||
+ | 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. | ||
- | can we use bone conduction to pick up chewing sounds and can we process and categorize them into something | + | {{: |
- | ===articles=== | + | < |
- | {{ :: | + | </blockquote> |
- | {{ ::zampini2004.pdf |"the role of auditory cues in modulating the perceived crispness and staleness of potato chips"}}\\ | + | |
- | {{ :: | + | |
- | {{ :: | + | |
- | {{ :: | + | |
- | [[https:// | + | |
- | + | ||
- | === recording technique === | + | |
< | < | ||
Line 22: | Line 35: | ||
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. | ||
- | < | + | |
+ | < | ||
</ | </ | ||
< | < | ||
- | Participants were seated comfortably in a small sound-attenuated booth [...] A microphone (Sennheiser ME66/K6 supercardioid, | + | Participants were seated comfortably in a small sound-attenuated booth [...] A microphone (Sennheiser ME66/K6 supercardioid, |
- | + | ||
- | Food sounds normally consist of both air- and bone-conducted components, with the relative contribution of the former being greater when the | + | |
- | mouth is open rather than closed (Lee et al. 1990; Dacremont et al. 1991). | + | |
- | + | ||
- | Given that the only sounds that were modified in the present study were those picked up by the microphone situated outside the mouth, all of the effects | + | |
- | reported here should be attributed to the modification of the airborne component of the biting sound (Lee et al. 1990). Nevertheless, | + | |
{{: | {{: | ||
- | < | + | < |
</ | </ | ||
- | ===hardware=== | ||
- | {{: | + | ===articles=== |
+ | *{{ :: | ||
+ | *{{ :: | ||
+ | *{{ :: | ||
+ | *{{ :: | ||
+ | *{{ :: | ||
+ | *{{ :: | ||
+ | *{{ :: | ||
+ | [[https:// | ||
+ | |||
+ | ===hardware=== | ||
+ | |||
+ | {{: | ||
currently a homebrew pickup\piezo pickup microphone seems the best bet. | currently a homebrew pickup\piezo pickup microphone seems the best bet. |