52 Royalty-Free Audio Tracks for "Trill"

Portion of the noontime repertoire of the tower church bells in a small town, with a car passing close by. In the background, a cicada trills (which means it is the height of summer in the southeast united states).

Bats recorded along the lagan river near belfast in september 2019. This recording was originally made at 192 khz but the registered sample rate has been changed to 16 khz in order to make their ultrasonic calls audible in playback. In this excerpt you can hear social calls (the trills), soprano pipistrelle echolocation (the higher pitched chirps) and common pipistrelle echolocation (the lower pitched chirps). Recorded on a sony pcm d100 using knowles ultrasonic mics. Noise reduction has been applied.