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 calibration services and recommends such calibration every second year.

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

GRAS 146AE 1/2'' CCP Free-field Rugged Microphone Set

IEC 61094-4/WS2F
Freq range: 3.15 Hz to 20 kHz
Dyn range: 18 dB(A) to 138 dB
Sensitivity: 50 mV/Pa
Temperature: -40 to +125°C
Humidity: 0 – 95%
IP67

GRAS 146AE 1/2'' CCP Free-field Rugged Microphone Set

The GRAS 146AE is a 1/2" free-field measurement microphone set for measurements in extreme environments. It is terminated with a BNC connector and is optimzed for use under rough conditions at temperatures from -40 to 125°C. It provides accurate data under the most challenging conditions - it can re..

GRAS 46AD 1/2" CCP Pressure Standard Microphone Set, High Sensitivity

Freq range: 3.15 Hz to 10 kHz
Dyn range: 18 dB(A) to 138 dB
Sensitivity: 50 mV/Pa

GRAS 46AD 1/2" CCP Pressure Standard Microphone Set, High Sensitivity

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

GRAS 46AE 1/2'' CCP Free-field Standard Microphone Set

Freq range: 3.15 Hz to 20 kHz
Dyn range: 17 dB(A) to 138 dB
Sensitivity: 50 mV/Pa
Use: For general acoustic diagnostics

GRAS 46AE 1/2'' CCP Free-field Standard Microphone Set

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

GRAS 46AF 1/2'' LEMO Free-field Standard Microphone Set

Freq range: 3.15 Hz to 20 kHz
Dyn range: 17 dB(A) to 149 dB
Sensitivity: 50 mV/Pa
Use: For general acoustic diagnostics

GRAS 46AF 1/2'' LEMO Free-field Standard Microphone Set

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

GRAS 46AM 1/2'' CCP Free-field Standard Microphone Set, Wide Frequency

Freq range: 3.15 Hz to 31.5 kHz
Dyn range: 25 dB(A) to 149 dB
Sensitivity: 14.5 mV/Pa
Use: For general acoustic diagnostics

GRAS 46AM 1/2'' CCP Free-field Standard Microphone Set, Wide Frequency

The GRAS 46AM is a 1/2" Constant Current Power (CCP) free-field microphone set for measuring medium sound pressure levels at a wide range of frequencies. It is terminated with a BNC connector and is TEDS compatible. The equivalent traditional 200 V LEMO type is GRAS 46AC...

GRAS 46AO 1/2'' CCP Pressure Standard Microphone Set

Freq range: 3.15 Hz to 20 kHz
Dyn range: 25 dB(A) to 150 dB
Sensitivity: 12 mV/Pa

GRAS 46AO 1/2'' CCP Pressure Standard Microphone Set

The 46AO is a 1/2" CCP microphone set for wide-frequency pressure measurements. Its LEMO equivalent is 46AG...

GRAS 46AQ 1/2'' CCP Random Incidence Standard Microphone Set

Freq range: 3.15 Hz to 12.5 kHz
Dyn range: 17 dB(A) to 138 dB
Sensitivity: 50 mV/Pa

GRAS 46AQ 1/2'' CCP Random Incidence Standard Microphone Set

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

GRAS 46AZ 1/2'' CCP Free-field Standard Microphone Set, Low Frequency

Freq range (±3 dB): 0.5 Hz to 20 kHz
Dyn range: 17 dB(A) to 138 dB
Sensitivity: 50 mV/Pa
Use: For low frequency acoustic diagnostics

GRAS 46AZ 1/2'' CCP Free-field Standard Microphone Set, Low Frequency

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

GRAS 46BD 1/4" CCP Pressure Standard Microphone Set

Freq range: 4 Hz to 70 kHz
Dyn range: 44 dB(A) to 166 dB
Sensitivity: 1.45 mV/Pa

GRAS 46BD 1/4" CCP Pressure Standard Microphone Set

The 46BD is a 1/4" CCP microphone set for pressure measurements...

GRAS 46BD-FV 1/4" CCP Pressure Standard Microphone Set, Front Vented

Freq range: 4 Hz to 70 kHz
Dyn range: 44 dB(A) to 166 dB
Sensitivity: 1.45 mV/Pa

GRAS 46BD-FV 1/4" CCP Pressure Standard Microphone Set, Front Vented

The 46BD-FV is a front vented 1/4” CCP microphone set for pressure measurements...

GRAS 46BD-S1 1/4" CCP Pressure Standard Microphone Set with SMB connector

Freq range: 4 Hz to 70 kHz
Dyn range: 44 dB(A) to 166 dB
Sensitivity: 1.45 mV/Pa

GRAS 46BD-S1 1/4" CCP Pressure Standard Microphone Set with SMB connector

The 46BD-S1 is a 1/4" CCP microphone set for pressure measurements. It is terminated with a SMB connector...

GRAS 46BE 1/4" CCP Free-field Standard Microphone Set

Freq range: 4 Hz to 80 kHz
Dyn range: 35 dBA to 160 dB
Sensitivity: 3.6 mV/Pa
Use: For general acoustic diagnostics

GRAS 46BE 1/4" CCP Free-field Standard Microphone Set

The GRAS 46BE is a 1/4" Constant Current Power CCP free-field microphone set for measuring high sound pressure levels at high frequencies. It is terminated with a 10/32 UNC microdot female connector and is TEDS compatible. The equivalent traditional 200 V LEMO type is GRAS 46BF...