ESP Sensor for high frequency sound

I recently installed an air conditioner that uses an inverter compressor which has a very high pitched squeal to it. I was wondering if there were any esp compatible sensors that I could use that would be able to help me assess my insulation.

Air conditioner: 12,000 BTU U-shaped Air Conditioner

Suspected frequency range:

“The exact frequency is 18150 hz +/- 120hz, with precision (bin size) of 12 hz. So it is probably an 18.15khz inverter modulated by a rectified 60hz power line.”