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Products

Automotive Test Systems
Noise Source Identification
Building Acoustics
Defense Combat Sound Source Localisation
Dynamometers
Material Testing
Microflown Probes
Noise and Volume Sources
Noise Modelling Software
Noise Control Solutions
Noise Monitoring Terminal
NVH Test Facilities
Portable Data Acquisition Systems
Sound Level Meters
Sound Level Meter NOR 103 Sound Level Meters NOR 131/132 Sound Analyser NOR 140 Sound Level Meter NOR 145 Sound and Vibration Analyser NOR 150
Sound Quality
Vehicle Data Acquisition Systems
Vibration Meters

Hemisphere Kits

The GRAS hemispheres are compliant with the ISO 3744, 3745 and 3746 (ANSI S12.54, S12.55, S12.56) standards and accommodate for 4, 10 and 20 positions. Two hemisphere structures are available; a 1 m measurement radius and a 2 m measurement radius. Each structure is available in CCP, LEMO and LEMO low noise variants.

Link to GRAS Website:

Hemisphere Structure