Special microphones are often required for applications where there are particular requirements regarding the methods of measurements and configurations.
GRAS special microphones are categorized as
Turb. att.: Up to 25 dB*
Turb. speed: Up to Mach 0.2
Turb. suppr. freq. range: 500 Hz - 10 kHz*
Acoustic att.: Less than 3 dB
Directivity: ± 60 Deg
Freq. range (acoustic) 100 Hz - 70 kHz
Dyn.range 44 dB(A) - 166 dB *Depending on flow-speed
GRAS 67TS-1-CL Turbulence Screen Kit with Flush-mount Microphone
The GRAS 67TS-1-CL Turbulence Screen Kit is designed for aeroacoustic testing in solid-walled wind tunnels. The hydrodynamic component of turbulence is attenuated up to 25 dB. Thereby the acoustic signals of interest can be identified and diagnosed with a reliable resolution..
Freq range (±3 dB): 0.5 Hz to 20 kHz
Dyn range: 17 dB(A) to 149 dB
Sensitivity: 50 mV/Pa
Use: For low frequency acoustic diagnostics
GRAS 46AN 1/2'' LEMO Free-field Standard Microphone Set, Low Frequency
The GRAS 46AN is a 1/2" Traditional Power (LEMO) free-field microphone set for measuring medium sound pressure levels at low frequencies. It is terminated with a 7-pin LEMO connector and is TEDS compatible. The equivalent Constant Current Power (CCP) type is GRAS 46AZ...