Microphones

Magnetic


• Robust reliability and high performance
• Does not require a bias voltage

Knowles offers boom microphones that utilize magnetic microphone elements. These elements generate their own signal and, unlike traditional dynamic microphones, do not require a bias voltage. This feature can be helpful to ensure compatibility with radios.
BJ-based boom microphones have been chosen over dynamic microphones to upgrade performance and reliability for military and first responder applications.

Product Families Model ID Dimensions 1 kHz sensitivity Port Location Directional Downloads
BJ BJ-21590-000 7.92mm x 5.70mm x 4.14mm
(.312in x .224in x .163in)		 -75 0Jn Omni-directional
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(396.12 kB)
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(417.22 kB)
BJ BJ-28411-000 7.92mm x 5.70mm x 4.14mm
(.312in x .224in x .163in)		 -88 0n / 12n Noise Canceling
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(504.57 kB)
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(20.13 MB)