About G.R.A.S.
Audio Precision is proud to be an official reseller for G.R.A.S. Sound and Vibration. G.R.A.S. enjoys an extraordinary reputation in the field of sound and vibration, and is known for world-class acoustic products.
AP now offers a complete solution to customers looking to test devices with acoustic interfaces, matching the world’s best audio analyzers with the highest quality measurement mics, power supplies, calibrators, and accessories.
Both R&D and production test users now have a complete solution available from a single source for end-to-end testing utilizing acoustic, analog, AES digital, serial digital, HDMI, PDM (MEMS mics), and Bluetooth interfaces.
G.R.A.S. Products
We carry several microphones for different applications, plus various ear and mouth simulators, including the KEMAR Head And Torso Simulator (HATS). Datasheets may be downloaded directly from the G.R.A.S website.
Simulators
For smartphone and tablet customers, the KEMAR head and torso simulator, handset positioner, and ear and mouth simulators are essential tools for making measurements to international standards.
Ear and Mouth Simulators
- 43AB Artificial ear kit w/2cc IEC 126 coupler
- 43AC Artificial ear kit w/IEC 711 coupler
- 43AG Ear and cheek simulator
- 44AA Artificial mouth
- RA0045 IEC 711 coupler for use in 43AB
- RA0038 IEC 126 coupler for use in 43AB
Complete information for 43AB artificial ear kit
Complete information for 43AC artificial ear kit
Complete information for 43AG ear and cheek simulator
Complete information for 44AA artificial mouth kit
Complete information for RA0045 IEC 711 coupler
Complete information for RA0038 IEC 126 coupler
Head and Torso Simulator
- 45BA Complete KEMAR head & torso with couplers
- 45BM Complete KEMAR head & torso assembly with mouth simulator and couplers
- 45EA Telephone handset positioner with neck ring for KEMAR
- 40BP 1/4” Calibration microphone for handset positioner
- 26AC 1/4” Microphone preamp for 40BP
Download full specifications for 45BA KEMAR head and torso with couplers
Download full specifications for 45BM KEMAR head and torso with mouth simulator and couplers
Download full specifications for 45EA Telephone handset positioner with neck ring for KEMAR
Download full specifications for 40BP 1/4” calibration microphone
Download full specifications for 26CA microphone preamplifier
Microphones
MMK-4 Measurement Microphone Kit
This kit combines the popular 46AE high precision measurement microphone (see details below) with the 12AL power supply, and replaces the MMK-2 Measurement Microphone Kit.
- 46AE Microphone
- 12AL power supply
- BNC cable
- 42AB calibrator (optional)
Download MMK-4 datasheet
High Precision Microphone Sets
Designed for uncompromised performance in critical measurement situations, the 46 series sets are suitable for class 1 audio measurements. Each set is comprised of a prepolarized capsule mated to a preamp body, sealed together with a label, and calibrated as a unit. This simplifies microphone selection and ordering.
- 46AE 1/2” High precision microphone set, free field, constant current power.
- 46AO 1/2” High precision microphone set, pressure, constant current power
- 46BE 1/4” High precision microphone set, free field, constant current power
Download full specifications for 1/2” high precision mics
Download full specifications for 1/4” high precision mics
Cost Effective Microphone Sets
The 40PH measurement microphone is suitable for class 2 audio measurements used in production test. It is a one-piece integrated capsule/preamp design, with a 1/4” prepolarized free-field capsule. Although its self-noise, overload, and response accuracy do not match the high precision offerings, it is perfectly suited to many production-line applications.
- 40PH 1/4” Cost effective microphone for production test.
Download full specifications for 40PH
Mic Calibrators
- 42AB Sound calibrator 1 kHz, 114 dBSPL
- 42AA Pistonphone 250 Hz, 114 dBSPL
Download full specifications for 42AB sound calibrator
Download full specifications for 42AA pistonphone
Power Modules
- 12AL 1 channel microphone power module, constant current (used for all sets listed above)
- 12AR 2 channel microphone power module, 200 volt
- 12AD 1 channel microphone power module, 200 volt
Download full specifications for 12AL power module
Download full specifications for 12AR power module
Download full specifications for 12AD power module
Hearing Protector Test Fixture
- 45CA Complete hearing protector test fixture with couplers
Download full specifications for 45CA hearing protector test fixture
See the complete listing of other accessories.
