Magnetic

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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.

Features

Robust reliability and high performance
Does not require a bias voltage

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Model ID	Downloads	Family	Dimensions	kHz Sensitivity	Port location	Directional
BJ-21590-000	Tech Specs 3D Models No Downloads available for BJ-21590-000	BJ	7.92mm x 5.70mm x 4.14mm (.312in x .224in x .163in)	-75	0Jn	Omni-directional
BJ-28411-000	Tech Specs 3D Models No Downloads available for BJ-28411-000	BJ	7.92mm x 5.70mm x 4.14mm (.312in x .224in x .163in)	-88	0n / 12n	Noise Canceling