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Knowles accelerometer primarily used as a contact microphone

Knowles Acoustics' BU Series piezo-ceramic accelerometer has output from 20Hz to above 10kHz and is used primarily as a contact microphone for high noise environments. It may also be used as an accelerometer with lightweight structures.

As a contact microphone, the BU may be worn on the throat or touching a bony part of the head (top, temple, or mastoid bone). BU has been integrated into helmet designs for radio communication for military and emergency services.

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