Ultrasonic Sensor Help!

Hi!

I would like to use a ultrasonic transmitter/receiver pair which can detect the strength of the received ultrasonic signal or generate the spectrum of the signal.

Thanks!

kronos1998:
Hi!

I would like to use a ultrasonic transmitter/receiver pair which can detect the strength of the received ultrasonic signal or generate the spectrum of the signal.

Thanks!

Sounds like an interesting project. What sensor did you choose?

Have you found an ultrasonic sensor that is meant for hobby use that generates a spectrum of signal? That is something that would be really expensive since the transmitter.receiver pairs are rather resonant at the design frequency.

Paul

Receiver: most electret microphones will do for this.

To make a spectrum out of that signal: not with an Arduino. You're going to need pretty advanced signal processing for this.

It can definitely be done - my batscanner is doing something similar: listens to all sounds in the 20-130 kHz range, then shows which frequency is loudest.