Measurement microphone sets

The measurement microphone sets have been combined so they fulfil our users’ typical measurement needs. Independently of your measurement system and application you should be able to find a set that suits your needs. The microphone sets can be connected directly to all professional measurement systems and as indicated they are available for both CCP and 7-pin LEMO inputs.

If your measurement platform supports intelligent transducers according to IEEE 1451.4 (TEDS) you can simply plug in the microphones and they will identify themselves with their specific properties, types and calibration data. A feature especially appreciated by multi-channel users.

The CCP sets use high-quality coaxial cables, whereas the LEMO sets use a special, soft type of multicore shielded cable. If extended cables are to be used you should consider the possible influence on the upper frequency and dynamic ranges.

All microphone sets are delivered as a unit and are calibrated accordingly. The sets are delivered with calibration charts including sensitivity values and frequency response curves for the complete set. The sensitivity value can therefore be used directly in your system setup.

For frequent verification of the measurement chain a sound source will be required. GRAS supplies a 114 dB sound calibrator for this purpose. Depending on the use and your internal quality control requirements we recommend that the sets are recalibrated at least every second year. For a more accurate verification we recommend calibration with a pistonphone. GRAS supplies 114dB and 134dB pistonphones. Further, we recommend calibration of the sound sources against an extreme reliable reference. GRAS offers such a service and recommends this calibration every second year.

Pick your choice of microphone set or get guidance from the microphone guide.

GRAS 46BG 1/4" CCP Pressure Standard Microphone Set, High Pressure

Freq range: 3.15 Hz to 70 kHz
Dyn range: 60 dB(A) to 184 dB
Sensitivity: 0.25 mV/Pa

GRAS 46BG 1/4" CCP Pressure Standard Microphone Set, High Pressure

The GRAS 46BG is a 1/4" CCP pressure microphone set for measuring very high sound pressure levels...

GRAS 46BG-FV 1/4" CCP Pressure Front Vented Microphone Set, High Pressure

Freq range: 3.15 Hz to 70 kHz
Dyn range: 60 dB(A) to 184 dB
Sensitivity: 0.25 mV/Pa

GRAS 46BG-FV 1/4" CCP Pressure Front Vented Microphone Set, High Pressure

The GRAS 46BG is a front-vented 1/4" CCP pressure microphone set for measuring very high sound pressure levels...

GRAS 46BH-1 1/4" LEMO Pressure Standard Microphone Set, High pressure

Freq range: 10 Hz to 20 kHz
Dyn range: 54 dB(A) to 193 dB
Sensitivity: 0.4 mV/Pa

GRAS 46BH-1 1/4" LEMO Pressure Standard Microphone Set, High pressure

GRAS 46BH 1/4"' LEMO Pressure Microphone Set, High Pressure..

GRAS 46BL 1/4" CCP Pressure Standard Microphone Set, High Sensitivity

Freq range: 4 Hz to 20 kHz
Dyn range: 25 dB(A) to 147 dB
Sensitivity: 18 mV/Pa

GRAS 46BL 1/4" CCP Pressure Standard Microphone Set, High Sensitivity

The 46BL is a high-sensitive, low-noise 1/4" CCP condenser microphone set with rear-venting. The set consists of a 40BL 1/4" CCP Pressure Microphone, High Sensitivity and a 26CB 1/4" preamplifier with Microdot connector...

GRAS 46BL-HT 1/4" CCP Pressure High Temperature Microphone Set, High Sensitivity

Freq range: 4 Hz to 20 kHz
Dyn range: 25 dB(A) to 144 dB
Sensitivity: 18 mV/Pa
Special feature: For high temperatures

GRAS 46BL-HT 1/4" CCP Pressure High Temperature Microphone Set, High Sensitivity

The 46BL-HT is a high-sensitive, low-noise ¼” CCP microphone set with rear-venting. It is optimized for high temperatures – up to 120 °C/248 °F..

GRAS 46DD 1/8'' CCP Pressure Standard Microphone Set

Freq range: 6.5 Hz to 70 kHz
Dyn range: 47 dB(A) to 174 dB
Sensitivity: 0.8 mV/Pa

GRAS 46DD 1/8'' CCP Pressure Standard Microphone Set

GRAS 46DD 1/8'' CCP Pressure Microphone Set..

GRAS 46DD-FV 1/8'' CCP Pressure Standard Microphone Set, Front Vented

Freq range: 6.5 Hz to 70 kHz
Dyn range: 47 dB(A) to 175 dB
Sensitivity: 0.8 mV/Pa

GRAS 46DD-FV 1/8'' CCP Pressure Standard Microphone Set, Front Vented

GRAS 46DD-FV is a 1/8'' CCP Pressure Microphone Set with front venting..

GRAS 46DE 1/8'' CCP Pressure Standard Microphone Set

Freq range: 6.5 Hz to 140 kHz
Dyn range: 47 dB(A) to 174 dB
Sensitivity: 0.8 mV/Pa

GRAS 46DE 1/8'' CCP Pressure Standard Microphone Set

The GRAS 46DE is a 1/8'' CCP Pressure Microphone Set. The preamplifier is 1/8", making it the world's smallest microphone set...

GRAS 46DP-1 1/8" LEMO Pressure Standard Microphone Set

Freq range: 6.5 Hz to 140 kHz
Dyn range: 46 dB(A) to 178 dB
Sensitivity: 0.9 mV/Pa

GRAS 46DP-1 1/8" LEMO Pressure Standard Microphone Set

The 46DP-1 is a 1/8” LEMO microphone set for pressure measurements. ..

GRAS 46AC 1/2'' LEMO Free-field Standard Microphone Set, Wide Frequency

Freq range: 3.15 Hz to 40 kHz
Dyn range: 20 dB(A) to 164 dB
Sensitivity: 12.5 mV/Pa
Use: For general acoustic diagnostics

GRAS 46AC 1/2'' LEMO Free-field Standard Microphone Set, Wide Frequency

The GRAS 46AC is a 1/2" Traditional Power LEMO free-field microphone set for measuring medium sound pressure levels at a wide range of frequencies. It is terminated with a 7-pin LEMO connector and is TEDS compatible. The equivalent Constant Current Power (CCP) type is GRAS 46AM...

GRAS 46AR 1/2'' LEMO Random Incidence Standard Microphone Set

Freq range: 3.15 Hz to 16 kHz
Dyn range: 19 dB(A) 149 dB
Sensitivity: 50 mV/Pa

GRAS 46AR 1/2'' LEMO Random Incidence Standard Microphone Set

The 46AR is a 1/2" LEMO microphone set for random-incidence measurements...

GRAS 46AP 1/2" LEMO Pressure Standard Microphone Set, High Sensitivity

Freq range: 3.15 Hz to 10 kHz
Dyn range: 18 dB(A) to 149 dB
Sensitivity: 50 mV/Pa

GRAS 46AP 1/2" LEMO Pressure Standard Microphone Set, High Sensitivity

The GRAS 46AP is a 1/2" traditional 200 V (LEMO) pressure microphone set for measuring medium sound pressure levels at medium frequencies. It is terminated with a LEMO connector and is TEDS compatible. The equivalent Constant Current Power (CCP) type is GRAS 46AD...