Wildlife Acoustics sm3bat, Руководство пользователя

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SM3BAT User Guide Utilities
page
61
BIOACOUSTIC MONITORING SYSTEMS
6. Turn the calibrator ON and set the mode switch to CAL .
7. The SM3 displays the received signal level below the @40 for each channel.
8. Compare the signal level to the microphone specification. Microphone
sensitivity is affected by orientation. Rotate the microphone very slowly 360
degrees and note the largest (least negative) number:
■
A higher (less negative) number indicates a more sensitive microphone.
■
A lower number indicates some loss of sensitivity.
■
If the value is less (more negative) than -38 dB your microphone has
lost some or all of its sensitivity.
9.3.3
Chirp Mode
To test the SM3BAT system, the Ultrasonic Calibrator can emit loud ultrasonic
signals to the recorder while it is recording from some distance. Analyze these
recordings to verify that the recorder settings are appropriate and the system is
functioning as expected.
1. Remove the microphone adapter from the calibrator.