Ultrasonic Echolocation Behavior of a Flying Bat Measured by a Telemetry System and a High-speed Video System
نویسنده
چکیده
The present study investigated consistency of the constant frequency (CF) portion of biosonar pulse s emitted by CF-FM bats and relationship between the pulse emission and wing motion. Here, pulse CF2 frequency at rest, closely related to the reference frequency, was measured for several months. Besides, Doppler-shift compensation was investigated on different days by a telemetry-microphone (Telemike) on the head to examine daily consistency of the reference frequency during flight. Data indicated that neither the pulse CF2 frequency at rest or the reference frequency during flight was fixed. Video images revealed that pulses are emitted during upstrokes of wing motion.
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Echolocation intensity and directionality of perching and flying fringe-lipped bats, Trachops cirrhosus (Phyllostomidae)
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