measuring the sound intensity of Ultrasonic Pest Repellent

[mr. robot]

please help me
I need to know how can I measure the sound intensity of my ultrasonic pest repellent
it has frequency output of 38kHz-58kHz
I need to know the step by step procedure to measure the sound intensity at 4 meters if I only know the power output.
hoping someone could help me
thanks

 

[shrtrnd]

I don't know how to do this without some specialized equipment designed to do it.
I built a few of these years ago for my own use, maybe you're designing one for commercial sale?
The most important factor in the ones I built was finding the piezo 'speakers' capable of reproducing the desired frequency output. That took some effort.
Why is it that you need to measure sound 'intensity'?

 

[Alec_t]

Does this help?

 

[Colin Mitchell]

You need to get a piezo diaphragm that is capable of detecting (transmitting) at 60kHz.
Connect is to a CRO and look at the waveform. That's what I do. And the psychiatric nurse let's me do it twice a week.