- A phonographic pickup whose transducer is a piezoelectric crystal, which converts the movements of the stylus into the corresponding audio frequency voltage output. Also called crystal pickup, or piezoelectric pickup.
- A microphone whose transducer is a piezoelectric crystal, which converts audio-frequency vibrations into the corresponding audio-frequency voltage output. Also called crystal microphone, or piezoelectric microphone.
- synonym crystal microphone
- synonym crystal pickup
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