The latest can detect bats when it hears their 350 kHz sonar calls thanks to an ultrasonic microphone and op amp. The device then records the bat sounds and then either heterodynes the sound down ...

The sound bounces off of obstacles in their path, which allows them to kind of see in the dark. The noises are too high for humans to hear, which is why our volunteers use the microphone.

The sound bounces off of obstacles in their path, which allows them to kind of see in the dark. The noises are too high for humans to hear, which is why our volunteers use the microphone.

The first bat-wearable microphone is helping biologists study the bats’ good safety record at avoiding collisions in rush hour air. On summer evenings, in around a minute, some 2,000 greater ...

A simple buzzer and some microphones help a drone to navigate and map out its surroundings, much like how a bat uses sound to see in the dark By Alex Wilkins 2 February 2023 ...

“We placed the moth in front of a ultrasonic speaker and microphone. We then played pre-recorded bat sounds to the moth and watched and recorded their behavior,” said Kawahara, whose study was ...