BL Series Piezo Ceramic Microphone

The piezo ceramic microphone series is rugged, stable, and versatile

Image of Knowles' BL Series Piezo Ceramic MicrophoneKnowles' piezo ceramic microphone series is rugged, stable, and versatile. Design variables include standard, thin, or a one-half inch cylindrical shell with a cable assembly. Both communication and broadband frequency responses are available. The series features high vibration sensitivity and may be used as accelerometers.


  • Ceramic vibration designs
  • High vibration sensitivity
  • High resistance to mechanical shock
  • Integral FET amplifier
  • Wide frequency range


  • Communications - headsets, handsets, earpieces, telephony, voice recognition, emergency services, military, surveillance
  • Pro audio - in-ear speakers, lapel microphones, boom microphones
  • Medical and more - sensors, audiometers, medical implants
BL Series Piezo Ceramic Microphone
Manufacturer Part NumberDescriptionTypeOutput TypeAvailable QuantityBuy Now
BL-21994-000MIC PIEZO ANALOG OMNI -69DBPiezoAnalog76 - Immediate
BL-21785-000MIC PIEZO ANALOG OMNI -69DBPiezoAnalog44 - Immediate
BL-23497-000MIC PIEZO ANALOG OMNI -69DBPiezoAnalog22 - Immediate
BL-21671-140MIC PIEZO ANALOG OMNI -54.5DBPiezoAnalog0
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Published: 2014-04-17