I've used Primo EM258 mics with an XLR adapter, they can pick up ultrasound, although the datasheet doesn't really mention this. See - https://zachpoff.com/res

I've used Primo EM258 mics with an XLR adapter, they can pick up ultrasound, although the datasheet doesn't really mention this. See - https://zachpoff.com/resources/cheap-microphones-for-ultrasound/ https://zachpoff.com/resources/cheap-microphones-for-ultraso... Reading wikipedia "Bats emit calls from about 12 kHz to 160 kHz, but the upper frequencies in this range are rapidly absorbed in air.", so I guess the Primo wouldn't be suitable for the higher bat freqs.