Acoustical Calibration Accuracy
RESON uses a “comparison calibration” method. A calibrated reference hydrophone/projector forms the basis for the method. Our reference hydrophones/projectors are calibrated at NPL in London.
The uncertainty of our calibrations is frequency dependent.
For a typical hydrophone, such as a TC4034, calibrated in the interval from 5 to 400kHz, the uncertainty of the measured value in the frequency band is up to ±0.8dB.
The uncertainty of our calibrations is frequency dependent.
| Frequency Interval | Uncertainty of measured value |
| 2-5kHz | ±1.83db |
| 6-20kHz | ±0.76db |
| 21-70kHz | ±0.70db |
| 71-420kHz | ±0.70db |
| 430-490kHz | ±0.77db |
| 500kHz | ±0.85db |
| Above 500kHz | ±1.29db |
For a typical hydrophone, such as a TC4034, calibrated in the interval from 5 to 400kHz, the uncertainty of the measured value in the frequency band is up to ±0.8dB.
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