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AUDIO
Please note: If you are unable to change the Audio, it may be because the profile is
locked. You will need to Creating a New Profile to unlock Audio in MENU SETTINGS.
Pitch Shifting
This mode compresses the ultrasonic spectrum down into an audible band by shifting the
pitch of the sound. Harmonic components and amplitude of the bat calls are kept in this
process. This is the recommended audio mode for listening to bats over the full frequency
spectrum as constant adjustments are not required for tuning or sensitivity. This audio
mode cannot be selected if viewing in zero crossing or basic mode.
Heterodyne
This mode shifts down a portion of the ultrasonic band into the human hearing range by
mixing the signal with an internal reference frequency. This reference frequency is adjusted
by the user to suit the frequency of bat calls of interest. The bandwidth of the heterodyne
mixing is about 5 kHz, so bats calling at a significantly different frequency to the reference
frequency will not be heard.
Current heterodyne frequency
Peak energy frequency
Currently recording
Relative humidity
GPS status
Latitude and longitude
Compass
Ambient light
Temperature
Memory
Play time expansion
Auto-tune heterodyne