Special microphones
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
Freq response: IEC 61043
Dyn range: 20 dB(A) to 157 dB
Sensitivity: 25 mV/Pa
GRAS 40AI 1/2" Ext. Polarized Intensity Microphone Pair
The 40AI is an IEC 61094-compliant, WS2F ½" externally polarized sound-intensity microphone pair especially suited for sound-intensity and sound-power measurements, sound-source location and IEC 61043 Standard Instrumentation. Its equivalent prepolarized version is GRAS 40GI..
Freq response: IEC 61043
Dyn range: 20 dB(A) to 157 dB
Sensitivity: 25 mV/Pa
GRAS 40AK 1/2" Ext. Polarized Intensity Microphone Kit
The 40AK is an IEC 61094-compliant, WS2F ½" externally polarized sound-intensity microphone set. The microphones in the set are two 40AI microphones - two phase-matched free-field condenser microphones with extremely well-controlled phase characteristics for use in sound-intensity probes. This micro..
Freq range: 0.5 Hz to 20 kHz
Dyn range: 14 dBA to 149 dB
Sensitivity: 50 mV/Pa
GRAS 40AN 1/2" Ext. Polarized Free-field Microphone, Low Frequency
The 40AN is an IEC 61094 WS2F classified ½” externally polarized free-field, low-frequency microphone with rear-venting. The prepolarized equivalent is GRAS 40AZ...
Freq range: 0.5 Hz to 20 kHz
Dyn range: 14 dB(A) to 148 dB
Sensitivity: 50 mV/Pa
GRAS 40AZ 1/2" Prepolarized Free-field Microphone, Low Frequency
The 40AZ is a prepolarized free-field microphone with a large dynamic range and a wide frequency response. Its externally polarized equivalent is GRAS 40AN...
Freq response: IEC 61043
Dyn range: 35 dB(A) to 172 dB
Sensitivity: 4 mV/Pa
GRAS 40BI 1/4" Ext. Polarized Intensity Microphone Kit
The 40BI is an IEC 61094-compliant, WS3F ¼" externally polarized sound-intensity microphone pair. The 40BI microphone pair consists of two phase-matched free-field condenser microphones with extremely well-controlled phase characteristics for use in sound-intensity probes. Their standard mounting th..
Freq response: IEC 61043
Dyn range: 27 dB(A) to 163 dB
Sensitivity: 12.5 mV/Pa
GRAS 40GI 1/2" Prepolarized Intensity Microphone Pair
The 40GI is an IEC 61043-compliant prepolarized sound-intensity microphone pair. Its externally polarized equivalent is GRAS 40AI...
Freq response: IEC 61043
Dyn range: 27 dB(A) to 163 dB
Sensitivity: 12.5 mV/Pa
GRAS 40GK 1/2" Prepolarized Intensity Microphone Kit
The 40GK is an IEC 61094-compliant, WS2F ½" prepolarized sound-intensity microphone set. The microphones in the set are two 40GI microphones - two phase-matched free-field condenser microphones with extremely well-controlled phase characteristics for use in sound-intensity probes. This microphone pa..
Freq range: 10 Hz to 10 kHz
Dyn range: -2 dB(A) to 110 dB
Sensitivity: 1.1 V/Pa
GRAS 40HF 1'' Lownoise Microphone System
The GRAS 40HF 1-inch Lownoise Microphone System 40HF can measure sound pressure levels well below the threshold of human hearing; and is amply suitable for use in sound-power measurements on even very quiet products. Its very wide dynamic range permits measurements down to below – 10 dB re. 20 ..
Freq range: 10 Hz to 16 kHz
Dyn range: 6.5 dB(A) to 113 dB
Sensitivity: 800 mV/Pa
GRAS 40HH 1/2'' Lownoise Microphone System
The GRAS 40HH 1/2" Lownoise Microphone System can measure sound pressure levels down to close to the threshold of human hearing; and is amply suitable for use in sound-power measurements on even very quiet products. Its very wide dynamic range permits measurements down to 6.5 dB re. 20 μPa (in ..
Freq range: 10 Hz to 16 kHz
Dyn range: 6.5 dB(A) to 110 dB
Sensitivity: 850 mV/Pa
GRAS 40HL 1/2'' LEMO Low-noise Microphone System
The GRAS 40HL 1/2" Low-noise Microphone System measures sound pressure levels down close to the threshold of human hearing. It is thus generally suitable for sound-power measurements on even very quiet products. Its very wide dynamic range permits measurements down to 6.5 dB re. 20 μPa (in 1/3-octav..
Freq range: 10 Hz to 16 kHz
Dyn range: 6.5 dB(A) to 113 dB
Sensitivity: 800 mV/Pa
GRAS 40HT 1/2'' Lownoise Microphone System for Confined Spaces
The GRAS 40HT ½-inch Lownoise Microphone System for Confined Spaces has specifications similar to GRAS 40HH but is designed for little space applications...
Freq range: 5 Hz to 70 kHz
Dyn range: 56 dB(A) to 178 dB
Sensitivity: 0.5 mV/Pa
GRAS 40LA 1/4" CCP Precision Surface Microphone, High Pressure
The GRAS 40LA High-Precision Surface Microphone is a high-precision microphone for measurements on planar and curved surfaces. It has a wide useful frequency range reaching up to 70 kHz and a large dynamic range topping at around 178 dB...
