Pulled as an example from a personal collection of high-frequency interference recordings made with a Radioshack Telephone mic (I love those little buggers!) via a Sound Devices 702 and Barcus Barry pre-amp.
The original was recorded at 192kHz / 24bit. This example is the source original for https://soundcloud.com/soundeziner/48khz_tone_lamp.
The source was a goose-neck lamp at my bedside.
Play this for your dog.
