AnomalyDistant diesel engine, or heavy prop plane climbing. I am pretty sure this is an externally produced phenomenon, I can tell my mild tinnitus is internal. I have pretty good ears even with the high freq loss, and can still tell the difference between a Steinway and a Bechstein on CDs. I have almost perfect pitch, learnt not inborn, and can tune a guitar to concert with no reference.
Italy, Torre Paponi · 2018-02-13 · from the WORLDHUMMAP archive
An account in Italy, Torre Paponi
What they reported
First noticed: 2000
Pitch: 83HZ
Loudest: During the night
Where: Indoors
Changes with weather: No obvious correlation.
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This is a Hum report from Dr Glen MacPherson's World Hum Map, an open, worldwide record of people who hear an unexplained low-frequency hum. Reproduced with permission and with thanks; the project is at thehum.info. We remove anything on request. Location shown is approximate.