Specter Trail

In the midst of a noisy radio transmission intercepted from a suspicious transmitter, our analysts recovered a single audio file.
It sounds like nothing more than static and occasional beeps... but something feels off.
Rumor has it that the transmission contains hidden geographic coordinates embedded as a spectral trace. The coordinates supposedly point to a specific country.

Your task: Analyze the audio file, reveal the hidden image in the spectrogram, extract the coordinates, and identify the country.