G.R.A.S. Sound & Vibration
Pistonphone Types 42AA/42AA-S1 - Page 15
4. Specications
Sound pressure level:
Nominal: 114 dB re. 20 µPa
Individually calibrated and valid for the following ambient reference conditions:-
Pressure: 1013 hPa
Temperature: 23 °C
Humidity: 50 % RH
Calibration accuracy:
Absolute: 1/2” mic.: ±0.09 dB at reference condition
1” mic.: ±0.2 dB at reference condition
When corrected for 1/2” mic.: ±0.1 dB
ambient pressure: 1” mic.: ±0.2 dB
Frequency:
250 Hz ±0.5 %
Distortion:
<1.5 %
Nominal effective coupler volume:
15540 mm
3
(including effective load volume of microphone type 40AG or type 40EN)
Temperature range:
– 10 °C to +55 °C (batteries permitting)
Batteries:
Four standard LR6-AA alkaline cells
Dimensions:
Length: 175 mm (6.89 in)
Width: 35 mm (1.38 in)
Height: 35 mm (1.38 in)
Weight: 325 g (0.7 lbs)
1
Applies only to Pistonphones tted with a 1-inch microphone coupler RA0023
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