Anomalyuneven thrumming 40-45hz Tried an FFT analyzer on my iPad & iPhone, both seem very poor at low Freq. Tested by placing iPad on digital piano and keys played in lowest registers almost didn't show up on FFT at all, but still the FFT programs show highest dB in lowest freq ranges. Makes me think there is a lot of LF noise that is just "background". Have some home music audio gear (large diaphragm condenser mic, etc.), would like recommendation for how use to isolate & identify this noise.
94065 · 2019-04-28 · from the WORLDHUMMAP archive
An account in 94065
What they reported
First noticed: 2017
Pitch: 40-45hz
Loudest: Equal night and day
Where: Indoors
Symptoms: Insomnia, Sense of vibration, Annoyance
Changes with weather: not that I've noticed
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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.