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.
Freq range: 3.15 Hz to 20 kHz
Dyn range: 18 dB(A) to 133 dB
Sensitivity: 50 mV/Pa
Temperature: -40 to +125°C
Humidity: 10 – 90%
IP67
GRAS 146AE 1/2'' CCP Free-field 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 resist shock, vibration, water, dust and extreme temperatures.
Freq range: 3.15 Hz to 20 kHz
Dyn range: 19 dB(A) to 133 dB
Sensitivity: 42 mV/Pa
Temperature: -40 to +125°C
Humidity: 0 – 90%
IP67
GRAS 147AX CCP Rugged Pressure Microphone
The GRAS 147AX is a rugged CCP surface-mounted pressure microphone optimized for automotive engine compartment testing. It has an integrated cable with BNC connector and comes with a novel magnetic mounting system for easy and precise mounting even in difficult-to-access locations.
Freq range: 3.15 Hz to 20 kHz
Dyn range: 18 dB(A) to 133 dB
Sensitivity: 50 mV/Pa
Temperature: -40 to +125°C
Humidity: 0 – 90%
IEC 61672 class 2
IP67
GRAS 147EB CCP X-Rugged Microphone Set
The GRAS 147EB is a free-field microphone set optimized for automotive brake noise testing. With a rugged design and extra protection of the diaphragm it is ideal for prolonged driving tests on public roads. It provides accurate data under the most challenging conditions - it can resist shock, vibration, water, dust and extreme temperatures. It has a watertight BNC connector.
Freq range: 3.15 Hz to 20 kHz
Dyn range: 17 dB(A) to 138 dB
Sensitivity: 50 mV/Pa
IEC 61672 Class 1
Use: For general acoustic testing—
SysCheck2-enabled measurement chains
GRAS 246AE 1/2" CCP Free-field Standard SysCheck2™ Microphone Set
GRAS 246AE is a ½″ Constant Current Power (CCP) free-field microphone set with SysCheck2™ and is optimized for all acoustic applications, where the location of the main sound source is known and the microphone can be pointed directly at it ensuring 0° incidence. It is terminated with a BNC connector and is TEDS compatible.
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.
Freq range: 3.15 Hz to 20 kHz
Dyn range: 17 dB(A) to 138 dB
Sensitivity: 50 mV/Pa
IEC 61672 Class 1
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.
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.
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.
Freq range: 3.15 Hz to 20 kHz
Dyn range: 25 dB(A) to 150 dB
Sensitivity: 12 mV/Pa
GRAS 46AO-S2 1/2'' CCP Pressure Microphone Set, very short
The 46AO-S2 is a 1/2" CCP microphone set for wide-frequency pressure measurements with very short preamplifier for confined spaces.
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.
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.
Freq range: 4 Hz to 20 kHz
Dyn range: 24 dB(A) to 145 dB
Sensitivity: 20 mV/Pa
GRAS 46BC 1/4" CCP Multifield Microphone Set, High Sensitivity
The 46BC is a high-sensitivity, low-noise, multifield ¼″ CCP condenser microphone set with rear venting and is optimized for use with the protection grid.
Freq range: 5 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.
Freq range: 5 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.
Freq range: 5 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.
Freq range: 4 Hz to 80 kHz
Dyn range: 35 dB(A) 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 ¼″ 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 NOTE: Optimized for use without protection grid—remove grid before measuring.
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.
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-FV is a front-vented 1/4" CCP pressure microphone set for measuring very high sound pressure levels.
Freq range: 4 Hz to 20 kHz
Dyn range: 24 dB(A) to 146 dB
Sensitivity: 20 mV/Pa
GRAS 46BL-1 1/4" CCP Pressure Standard Microphone Set, High Sensitivity
GRAS 46BL-1 is a high-sensitivity, low-noise ¼″ CCP condenser microphone set with rear-venting.
Freq range: 4 Hz to 20 kHz
Dyn range: 24 dB(A) to 146 dB
Sensitivity: 20 mV/Pa
GRAS 46BL-1-FV 1/4" CCP Pressure Standard Microphone Set, High Sensitivity, Front-vented
GRAS 46BL-1-FV is a high-sensitivity, low-noise ¼″ CCP condenser microphone set with front-venting.
Freq range: 6.5 Hz to 140 kHz
Dyn range: 52 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
Freq range: 6.5 Hz to 70 kHz
Dyn range: 52 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
Freq range: 6.5 Hz to 140 kHz
Dyn range: 52 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.
Freq range: 4 Hz to 100 kHz
Dyn range: 35 dB(A) to 172 dB
Sensitivity: 3.6 mV/Pa
Use: For general acoustic diagnostics
GRAS 46BF-1 1/4" LEMO Free-field Standard Microphone Set
The GRAS 46BF-1 is a 1/4" Traditional Power (LEMO) free-field microphone set for measuring high sound pressure levels at high frequencies. It is terminated with a 5-pin LEMO mini-connector and is TEDS compatible. The equivalent Constant Current Power (CCP) type is GRAS 46BE.
Freq range: 4 Hz to 70 kHz
Dyn range: 39 dB(A) to 172 dB
Sensitivity: 1.5 mV/Pa
GRAS 46BP-1 1/4" LEMO Pressure Standard Microphone Set
The 46BP is a 1/4" LEMO microphone set for pressure measurements.
Freq range (±3 dB): 0.5 Hz to 20 kHz
Dyn range: 17 dB(A) to 149 dB
Sensitivity: 50 mV/Pa
Use: For low frequency acoustic diagnostics
GRAS 46AN 1/2'' LEMO Free-field Standard Microphone Set, Low Frequency
The GRAS 46AN is a 1/2" Traditional Power (LEMO) free-field microphone set for measuring medium sound pressure levels at low frequencies. It is terminated with a 7-pin LEMO connector and is TEDS compatible. The equivalent Constant Current Power (CCP) type is GRAS 46AZ.
Freq range: 3.15 Hz to 20 kHz
Dyn range: 25 dB(A) to 164 dB
Sensitivity: 12 mV/Pa
GRAS 46AG 1/2'' LEMO Pressure Standard Microphone Set
The 46AG is a 1/2" LEMO microphone set for pressure measurements.
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.
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.
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.
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.
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
Freq range: 6.5 Hz to 140 kHz
Dyn range: 52 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.
