I'm looking for sources of ultrasonic speakers for a project. I wanted to be able to playback bat calls out of an ultrasonic speaker to test bat detectors and ultrasonic recording devices. The range of a bat in general can be anywhere between 30khz to 100khz, but specific bat species have smaller ranges, say 30khz to 60khz. Most ultrasonic piezos have a very short bandwidth. I'm thinking I would have to have a number of speakers to get the range I need.
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