Hi - first time poster, did a bit of searching on the forum, but didnt find an answer - looking for help,

In New Zealand we have only 2 mammals - both bats.

Near us is the long tailed bat - which echo locates using clicks around 40khz

I note the https://wiki.dfrobot.com/URM09_Ultrasonic_Sensor_(Gravity_Analog)_SKU_SEN0307 sensor uses Acoustic Frequency: 38~42KHz which sounds ideal

Question

Can we use this range finder to listen for the bat clicks only - eg no PING, just a level of received sound

Im guessing it needs to emmit a ping before any I2C or other signals are raised.
Does an LED light up when ~40Khz sound detected - i could work with that with arduino.

If we can easily use these low cost sensors as a detector - it would solve a lot of our bat population questions.

Any other sensors recommended would be greatly appreciated.

Thanks in advance

Paul

New Zealand