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42AA Pistonphone, Class 1/M
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42AA Pistonphone, Class 1/M
The GRAS Pistonphone 42AA is a battery-operated, precision sound source for accurate and reliable calibration of measurement microphones, sound level meters, and other sound measuring equipment.
With a microphone placed in the coupler of the pistonphone, the calibration level is:
At a static ambient pressure of 101.3 kPa, no further correction factors need be applied.
Key Specifications
| Frequency | 250 Hz |
| Sound pressure level | 114 re. 20 μPa dB |
| ANSI standard | S1.40 |
| IEC standard | 60942:2017 Class 1/M |
| Temperature range, operation | -10 to 55 °C / 14 to 131 °F |
| Battery type | 4 x AA alkaline (IEC LR 6) |
| Weight | 325.00 g / 11.464 oz |
Specifications from the official GRAS product sheet. Please refer to the attached datasheet for full details.
