Externally polarized cartridges (200 V)
Among GRAS measurement microphone cartridges, the externally-polarized microphones are used with standard preamplifiers, which have a 7-pin LEMO connector. The preamplifier should be connected to a power module or an analyzer input which can supply the preamplifier with power as well as 200 V polarization.
Freq range: 3.15 Hz to 40 kHz
Dyn range: 20 dBA to 164 dB
Sensitivity: 12.5 mV/Pa
GRAS 40AC 1/2" Ext. Polarized Free-field Microphone, Wide Frequency
The 40AC is an IEC 61094 WS2F classified ½” externally polarized free-field, wide-frequency microphone with rear-venting. The prepolarized equivalent is GRAS 40AM...
Freq range: 3.15 Hz to 20 kHz
Dyn range: 14 dBA to 149 dB
Sensitivity: 50 mV/Pa
GRAS 40AF 1/2" Ext. Polarized Free-field Microphone
The GRAS 40AF is a 1/2" Externally Polarized free-field microphone for measuring medium sound pressure levels at medium frequencies. The equivalent prepolarized 0 V type is GRAS 40AE...
Freq range: 3.15 Hz to 20 kHz
Dyn range: 20 dBA to 164 dB
Sensitivity: 12.5 mV/Pa
GRAS 40AG 1/2" Ext. Polarized Pressure Microphone
The 40AG is an IEC 61094 WS2P ½″ externally polarized pressure microphone with rear-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 reliab..
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: 3.15 Hz to 10 kHz
Dyn range: 16 dBA to 149 dB
Sensitivity: 50 mV/Pa
GRAS 40AP 1/2" Ext. Polarized Pressure Microphone, High Sensitivity
The 40AP is an IEC 61094 WS2P ½" externally polarized pressure microphone with rear-venting. It is a high-precision condenser microphone made according to IEC 61094-4 requirements and is ideal for coupler and boundary measurements in both laboratory and production environments. It is extremely robus..
Freq range: 3.15 Hz to 12.5 kHz
Dyn range: 14 dB(A) to 149 dB
Sensitivity: 50 mV/Pa
GRAS 40AR 1/2" Ext. Polarized Random Incidence Microphone
The 40AR is an IEC 61094 WS2P/D ½" externally polarized random-incidence microphone with rear-venting. The 40AR is a high-precision condenser microphone made according to IEC 61094-4 requirements. It also fulfills the requirements of ANSI S1.4...
Freq range: 3.15 Hz to 20 kHz
Dyn range: 20 dB(A) to 164 dB
Sensitivity: 12.5 mV/Pa
GRAS 40AU-1 1/2" Ext. Polarized Reference Pressure Microphone
The 40AU-1 is an IEC 61094 LS2aP ½" externally polarized reference microphone that is rear-vented. It is a ½" laboratory-standard pressure microphone that is ideal for precision sound pressure measurements. It has a front cavity as specified in IEC 61094-1 and is supplied with a protective dust cap...
Freq range: 4 Hz to 100 kHz
Dyn range: 30 dB(A) to 172 dB
Sensitivity: 4 mV/Pa
GRAS 40BF 1/4" Ext. Polarized Free-field Microphone
The 40BF is an IEC 61094 WS3F ¼” externally polarized free-field microphone with rear-venting. The prepolarized equivalent is GRAS 40BE. NOTE: Optimized for use without protection grid—remove grid before measuring...
Freq range: 10 Hz to 20 kHz
Dyn range: 54 dB(A) to 193 dB
Sensitivity: 0.4 mV/Pa
GRAS 40BH 1/4" Ext. Polarized Pressure Microphone, High Pressure
The 40BH is an IEC 61094 WS3P ¼" externally polarized high-pressure microphone with rear-venting. It is a high-precision condenser microphone made according to IEC 61094-4 requirements. Its very low sensitivity and wide frequency response make it ideal for measuring very high sound pressure levels o..
Freq range: 4 Hz to 70 kHz
Dyn range: 34 dB(A) to 169 dB
Sensitivity: 1.6 mV/Pa
GRAS 40BP 1/4" Ext. Polarized Pressure Microphone
The 40BP is an IEC 61094 WS3P 1/4" externally polarized pressure microphone with rear-venting. It is a high-precision condenser microphone made according to IEC 61094-4 requirements. It is a low-sensitivity microphone for sound measurements at high levels and high frequencies. Its low sensitivi..
Freq range: 4 Hz to 70 kHz
Dyn range: 34 dB(A) to 169 dB
Sensitivity: 1.6 mV/Pa
GRAS 40BP-FV 1/4" Ext. Polarized Pressure Microphone, Front Vented
The 40BP-FV is an IEC 61094 WS3P 1/4" externally polarized pressure microphone with front venting. It is a high-precision condenser microphone made according to IEC 61094-4 requirements. It is a low-sensitivity microphone for sound measurements at high levels and high frequencies. Its low sensi..
Freq range: 6.5 Hz to 140 kHz
Dyn range: 49 dB(A) to 178 dB
Sensitivity: 1 mV/Pa
GRAS 40DP 1/8" Ext. Polarized Pressure Microphone
The 40DP is an IEC 61094 ⅛″ externally polarized pressure microphone with rear-venting. Due to its tiny size, this high-precision condenser microphone can be used to measure very high-frequency sounds without disturbing the sound field...
