Experimentalists: understood, say no more.
Theorists: ok, show me the Hamiltonian...including the noise terms.
Setting up a bird listening device a few meters off an active runway and no filter for engine sounds.
Play back is of course volume tuned for the bird chirps when processing data
The funny thing about RF work is how casually a few orders of magnitudes gets thrown around. 10 dB fudge factors for assorted losses are quite common.