https://www.nist.gov/publications/performance-electret-ionization-chambers-magnetic-field
Electret Ionization Chambers (EIC) are widely used for measuring radon and radiation. The radiation measured includes alpha, beta and gamma radiation.
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https://electretrecords.com/
Music production and creative services.
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https://www.sparkfun.com/electret-condenser-microphone-with-washer.html
This Electret Condenser Microphone is meant to be used with the Teensy Audio Adaptor. The microphone is PUI Audio part AOM-6738P-R. A custom laser cut washer...
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