GRAS 46BP-1 1/4" LEMO Pressure Standard Microphone Set

46BP-1 is typically used for sound pressure, high frequency, and high level pressure measurements. It is suitable for general purpose acoustic measurements in couplers and at boundaries. The microphone in the 46BP-1 is very versatile when connected to the RA0086 Transmitter Adapter for 1/4" Microphones. The 46BP-1 becomes a high-impedance sound source when the RA0086 takes a calibration signal directly from the signal generator and makes the microphone behave like an electrostatic loudspeaker. When used for calibrating an acoustic coupler, this gives a frequency response that is as good as when the 46BP behaves like a microphone.

Freq range: 4 Hz to 70 kHz
Dyn range: 39 dB(A) to 172 dB
Sensitivity: 1.5 mV/Pa