As you might’ve already guessed the Raspberry Pi Pico Bat Detector and 384kHz full-spectrum recorder allows you to listen to the sonic chirps made by bats as they fly around. The PCB is now available ...
The range of human hearing goes up to about 20 kilohertz, which is fine for our purposes, but is pretty poor compared to plenty of other animal species. Dogs famously can hear up to about 60 kHz, and ...