KNOWLES

KNOWLES - BL microphone serie

Dimensions (mm):
7.87 x 5.54 x 4.06
Directivity:
Omni
Features:
Piezo Ceramic mic
Key features:
Knowles’ Piezo Ceramic Microphones (BL Series) are rugged, stable and versatile.
BL microphones are available in three different package sizes: standard, thin or 0.5"" cylindrical shell and cable assembly.
Both communication and broadband frequency response versions are offered. In addition, BL microphones have high vibration sensitivity and may be used as accelerometers.

High sensitivity
Wide frequency range
Integral FET amplifier
High resistance to mechanical shock
Various responses
Two case sizes available
Reference Sensitivity (dB re 1V/0.1Pa @ 1 kHz) DC Supply (V) Max. Amplifier Current Drain (uA) Maximum Noise (dB re 1V) A weighted Nominal Output Impedance (Ω) Comments
BL-21671-000 -54.0±3 1.3 50.0 32.0 dB 13000.0 Standard Response
BL-21671-140 -54.0±4 1.3 50.0 32.0 dB 13000.0 Faster Overpressure Recovery, Standard Response
BL-21785-000 -69.0±3 3.0 160.0 34.0 dB 4000.0 Broadband Response
BL-21994-000 -69.0±3 3.0 160.0 34.0 dB 4000.0 965mm Shielded Cable, Broadband Response
BL-23497-000 -69.0±3 3.0 160.0 34.0 dB 4000.0 34.3mm Leads Broadband Response
BL-27046-000 -69.0±3 1.3 160.0 34.0 dB 4000.0 Broadband Response