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You also need to check are they upto 75kHz.
Record their audio, post here
Will do Bojcha, will do!
https://ufile.io/vtbs3piv
ignore the weird buzz possible ground loop
what receiver did you use to record this ?
generally, when i am sampling something from the FM broadcast band, i'll use my SDR and save the selected bandwidth of the I/Q RF signal domain to a file.
this is akin to playback of the RF signal domain in the selected SDR software.
in the recording, 40Hz and below is at a "normal" level compared to 60Hz to 80Hz, which appears to be heavily emphasized.
however, it is difficult to ascertain whether the receiver that was used for this recording, is demodulating the baseband modulated signal in a flat manner as some receivers "alter" the demodulated and de-emphasized baseband audio to emphasize 60Hz for reasons of "impression" to the listener.
if you have an SDR, can you record the selected modulation bandwidth of the I/Q baseband as observed in the spectrum window ?