This is an interesting look into recording ultra-sound.
There’s a very cool sound in an episode of Here Be Monsters. The episode is called “The Bats that Stay,”and in the story Jeff Emtman, the producer, is on a hike with a couple of friends in Colorado. They’re climbing up to a cave nicknamed the Glory Hole in order to see the Mexican free-tailed bats that live there.
…and we’ve talked about some frequency-related stuff before here HELP! wav. recording with zoomH4N has ZZZZZZZZ