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SlurpingPus@lemmy.world ⁨18⁩ ⁨hours⁩ ago

Er, afaik popular mics are basically a speaker working in reverse, while piezoelectricity is employed in contact mics, which have rather peculiar use-cases.

Quoth Wikipedia:

The most common are the dynamic microphone, which uses a coil of wire suspended in a magnetic field; the condenser microphone, which uses the vibrating diaphragm as a capacitor plate; and the contact microphone, which uses a crystal of piezoelectric material.

The two uses for piezo mics that I’ve encountered are Brian Chippendale slapping one on his throat for the vocals; and a very curious bowed wooden musical instrument, wherein the mic picks up the sound.

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toynbee@lemmy.world ⁨18⁩ ⁨hours⁩ ago
Perhaps I’m confused, but your wiki quote itself references piezoelectricity (a word I’m pretty surprised is in my keyboard’s dictionary). Am I misunderstanding?

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- SlurpingPus@lemmy.world ⁨18⁩ ⁨hours⁩ ago
  Contact microphones, true to the name, work when in contact with another solid object that transmits sound. You’d have to shout pretty loudly into one to get it register your voice otherwise.
  
  A contact microphone is a form of microphone that senses audio vibrations through contact with solid objects. Unlike normal air microphones, contact microphones are almost completely insensitive to air vibrations but transduce only structure-borne sound. Often used as acoustic leakage probes, they also enjoy wide usage by electroacoustic music artists experimenting with sound. Contact microphones can be used to amplify sound from acoustic musical instruments, to sense drum hits, for triggering electronic samples, and to record sound in challenging environments, such as underwater under high pressure.
  
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  - toynbee@lemmy.world ⁨18⁩ ⁨hours⁩ ago
    Gotcha, thank you for the clarification.
    
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