Song Meter SM4BAT FS User Guide
9 Utilities
Wildlife Acoustics, Inc.
page
48
b.
Place the microphone in the calibrator microphone adapter. Insert the
microphone until it rests against the smaller opening of the adapter
circle.
c.
While looking at the dBv level
on the SM4BAT FS display,
slowly rotate the microphone
360 degrees. Note the largest
(least negative) number. If the
value is higher (less negative)
than
-38 dB
your microphone
has passed and is ready to use.
If the value is lower (more
negative) your microphone has
lost some or all of its sensitivity
and should be replaced.
8.
Press
◄
Left
when finished to exit the calibration utility.
Chirp Mode System Testing
To test the system, use the Ultrasonic Calibrator to emit loud ultrasonic signals
that can be picked up by the recorder from some distance. Analyze the
recording files later to verify that the SM4BAT FS settings are appropriate and
the system is functioning as expected.
1.
Prepare the SM4BAT FS for recording and
place it no more than 20 meters away from
the calibrator.
2.
Remove the microphone adapter from the
calibrator as shown.
3.
Set the toggle switch to
CHIRP
.
4.
The calibrator emits a 100ms long 40kHz
(+/- 10Hz) tone every 500ms. The amplitude
of the tone is 104dB SPL (+/- 3dB) at 10cm.
The signal can be picked up by the SM4BAT
FS recorder at distances up to 20 meters.
5.
Begin monitoring using
Time Expansion
Mode
and monitor with headphones (see
Monitoring Ultrasound in Time
Содержание Song Meter SM4BAT FS
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