UK, London · 2019-05-28 · from the WORLDHUMMAP archive
A low hum in UK, London
Low frequency humming sound like an engine in the distance, but frequency sometimes changes to a slightly higher more irritating frequency. More recently, the humming sound could be attenuated to a moderate level by sleeping with a silicone covered ear bud (earphone) in my right ear, when at a lower intensity. At a higher intensity, I can hear the sound in both ears, but this could be slightly attenuated with ear buds.
Very recently in the last two weeks, the hum appears to have an additional harmonic component, which affects the left ear more than the right. The additional component seems to be a higher frequency and a bit like a combination of morse code and Helmholtz resonance when blowing across a beer bottle, mainly from 11.30pm to 9am. This sound can only be slightly attenuated by earbuds and holding a pillow wrapped tightly around my head.
What they reported
First noticed: 2014
Pitch: Approx. 40 to 60 Hz generally between a sine and triangle wave. Sometimes the frequency increases to around 70Hz.
Loudest: During the night
Where: Indoors
Symptoms: Insomnia, Anxiety
Changes with weather: Sometimes. Higher intensity/ sound on overcast and cloudy days.
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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.
Anomaly