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. These are clearly marked to ease the mounting and maintain measurement repeatability. Two hemisphere structures are available; a 1 m measurement radius and a 2 m measurement radius.

GRAS 67HA 1 m LEMO Hemisphere kit

Freq range: 3.15 Hz to 20 kHz
Dyn range: 17 dBA to 149 dB
Sensitivity: 50 mV/Pa
Measures incl. feet: Diagonal 2716 mm Height 1283 mm

GRAS 67HA 1 m LEMO Hemisphere kit

The GRAS hemispheres will hold and position the measurement microphones according to the standards and have been designed with focus on your workflow; They are very easy to assemble and it is easy to position and access the DUT. Furthermore, in best GRAS tradition they are optimized acoustically for..

GRAS 67HA 1 m LEMO Lownoise Hemisphere kit

Freq range: 10 Hz to 16 kHz
Dyn range: 6.5 dB(A) to 110 dB
Sensitivity: 850 mV/Pa
Measures incl. feet: Diagonal 2716 mm Height 1283 mm

GRAS 67HA 1 m LEMO Lownoise Hemisphere kit

The GRAS hemispheres will hold and position the measurement microphones according to the standards and have been designed with focus on your workflow; They are very easy to assemble and it is easy to position and access the DUT. Furthermore, in best GRAS tradition they are optimized acoustically for..

GRAS 67HA 1m CCP Hemisphere kit

Freq range: 3.15 Hz to 20 kHz
Dyn range: 17 dBA to 138 dB
Sensitivity: 50 mV/Pa
Measures incl. feet: Diagonal 2716 mm Height 1283 mm

GRAS 67HA 1m CCP Hemisphere kit

The GRAS hemispheres will hold and position the measurement microphones according to the standards and have been designed with focus on your workflow; They are very easy to assemble and it is easy to position and access the DUT. Furthermore, in best GRAS tradition they are optimized acoustically for..

GRAS 67HB 2 m CCP Hemisphere kit

Freq range: 3.15 Hz to 20 kHz
Dyn range: 17 dBA to 138 dB
Sensitivity: 50 mV/Pa
Measures incl. feet: Diagonal 4716 mm Height 2283 mm

GRAS 67HB 2 m CCP Hemisphere kit

The GRAS hemispheres will hold and position the measurement microphones according to the standards and have been designed with focus on your workflow; They are very easy to assemble and it is easy to position and access the DUT. Furthermore, in best GRAS tradition they are optimized acoustically for..

GRAS 67HB 2 m LEMO Hemisphere kit

Freq range: 3.15 Hz to 20 kHz
Dyn range: 17 dB(A) to 149 dB
Sensitivity: 50 mV/Pa
Measures incl. feet: Diagonal 4716 mm Height 2283 mm

GRAS 67HB 2 m LEMO Hemisphere kit

The GRAS hemispheres will hold and position the measurement microphones according to the standards and have been designed with focus on your workflow; They are very easy to assemble and it is easy to position and access the DUT. Furthermore, in best GRAS tradition they are optimized acoustically for..

GRAS 67HB 2 m LEMO Lownoise Hemisphere kit

Freq range: 10 Hz to 16 kHz
Dyn range: 6.5 dB(A) to 110 dB
Sensitivity: 850 mV/Pa
Measures incl. feet: Diagonal 4716 mm Height 2283 mm

GRAS 67HB 2 m LEMO Lownoise Hemisphere kit

The GRAS hemispheres will hold and position the measurement microphones according to the standards and have been designed with focus on your workflow; They are very easy to assemble and it is easy to position and access the DUT. Furthermore, in best GRAS tradition they are optimized acoustically for..