Prepolarized cartridges (0 Volt)
Among GRAS measurement microphone cartridges, the prepolarized microphones are used typically with CCP (Constant Current Power) preamplifiers. These microphones must be connected to an input stage for CCP transducers or be powered by a CCP supply.
Freq range: 3.15 Hz to 10 kHz
Dyn range: 16 dB(A) to 148 dB
Sensitivity: 50 mV/Pa
GRAS 40AD 1/2" Prepolarized Pressure Microphone, High Sensitivity
The 40AD is an IEC 61094 WS2P ½" prepolarized pressure microphone with rear-venting. The externally polarized equivalent is GRAS 40AP..
Freq range: 3.15 Hz to 20 kHz
Dyn range: 15 dB(A) to 148 dB
Sensitivity: 50 mV/Pa
GRAS 40AE 1/2" Prepolarized Free-Field Microphone
The GRAS 40AE is a 1/2" Prepolarized free-field microphone for measuring medium sound pressure levels at medium frequencies. The equivalent externally polarized 200 V type is GRAS 40AF...
Freq range: 3.15 Hz to 31.5 kHz
Dyn range: 20 dB(A) to 163 dB
Sensitivity: 14.5 mV/Pa
GRAS 40AM 1/2" Prepolarized Free-Field Microphone, Wide Frequency
The 40AM is an IEC 61094 WS2F classified ½” prepolarized free-field, wide-frequency microphone with rear-venting. The externally polarized equivalent is GRAS 40AC...
Freq range: 3.15 Hz to 20 kHz
Dyn range: 20 dB(A) to 163 dB
Sensitivity: 12.5 mV/Pa
GRAS 40AO 1/2" Prepolarized Pressure Microphone
The 40AO is an IEC 61094 WS2P ½" prepolarized pressure microphone with rear-venting. Read about the externally polarized equivalent [40AG]. It is a high-precision condenser microphone made according to IEC 61094-4 requirements and is ideal for coupler measurements in both laboratory and production e..
Freq range: 3.15 Hz to 20 kHz
Dyn range: 20 dB(A) to 163 dB
Sensitivity: 12.5 mV/Pa
GRAS 40AO-FV 1/2" Prepolarized Pressure Microphone, Front Vented
The 40AO-FV is an IEC 61094 WS2P ½" prepolarized pressure microphone with front venting. It is a high-precision condenser microphone made according to IEC 61094-4 requirements and is ideal for coupler measurements in both laboratory and production environments. It is extremely robust and reliable a..
Freq range: 3.15 Hz to 12.5 kHz
Dyn range: 16 dB(A) to 148 dB
Sensitivity: 50 mV/Pa
GRAS 40AQ 1/2" Prepolarized Random Incidence Microphone
The 40AQ is an IEC 61094 WS2P/D ½" prepolarized random-incidence microphone with rear-venting. It is a high-precision condenser microphone made according to IEC 61094-4 requirements, optimized to measure sound correctly in random, diffuse, and reverberant sound fields. It is extremely robust and rel..
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 range: 5 Hz to 70 kHz
Dyn range: 44 dB(A) to 174 dB
Sensitivity: 1.6 mV/Pa
GRAS 40BD 1/4" Prepolarized Pressure Microphone
The 40BD is an IEC 61094 WS3P ¼″ prepolarized pressure microphone with rear-venting. It is a high-precision condenser microphone made according to IEC 61094-4 requirements. Its low sensitivity makes it ideal for sound measurements at high sound pressure levels of up to 174 dB. Its small size reduces..
Freq range: 5 Hz to 70 kHz
Dyn range: 44 dB(A) to 174 dB
Sensitivity: 1.6 mV/Pa
GRAS 40BD-FV 1/4" Prepolarized Pressure Microphone, Front Vented
The 40BD-FV is an IEC 61094 WS3P ¼″ prepolarized pressure microphone with front venting. It is a high-precision condenser microphone made according to IEC 61094-4 requirements. Its low sensitivity makes it ideal for sound measurements at high sound pressure levels of up to 166 dB. Its small size red..
Freq range: 4 Hz to 80 kHz
Dyn range: 30 dB(A) to 168 dB
Sensitivity: 4 mV/Pa
GRAS 40BE 1/4" Prepolarized Free-field Microphone
The 40BE is an IEC 61094 WS3F 1/4” prepolarized free-field microphone with rear-venting. The externally polarized equivalent is 40BF. NOTE: Optimized for use without protection grid—remove grid before measuring...
Freq range: 4 Hz to 80 kHz
Dyn range: 30 dB(A) to 168 dB
Sensitivity: 4 mV/Pa
GRAS 40BE-FV 1/4" Prepolarized Free-field Microphone, Front Vented
The 40BE-FV is an IEC 61094 WS3F 1/4” prepolarized free-field microphone with front venting. NOTE: Optimized for use without protection grid—remove grid before measuring...
Freq range: 6.5 Hz to 70 kHz
Dyn range: 49 dB(A) to 175 dB
Sensitivity: 0.9 mV/Pa
GRAS 40DD 1/8" Prepolarized Pressure Microphone
The 40DD is an IEC 61094 1/8" prepolarized pressure microphone with rear-venting. It is a high-precision condenser microphone made according to IEC 61094-4 requirements. Its tiny size allows it to be used for measuring very high frequency sounds without disturbing the sound field. It can measure sou..
