BSWA 308 - Page 116

BSWA 308/309 BSWA Technology Co., Ltd
114
Annex 2 Adjustments at the Calibration Check Frequency
Recommend to use CA111/CA114/CA115 sound calibrator for sensitivity calibration before
the measurement. The manual of sound calibrator provide the equivalent free field sound
level for 1/2” microphone as shown in the following table:
Type of Sound
Calibrator
Frequency
Calibration Sound Level for BSWA 308/309
Nominal 94dB
Nominal 114dB
CA111
1000Hz
93.8dB
113.8dB
CA114
1000Hz
93.8dB
N/A
CA115
1000Hz
N/A
113.8dB