Low rumbling / deep bass I see that some of the questions are related to medicines of an ototoxic or psychotropic nature, but I think that including questions about current level of psychosocial and socioeconomic stressors could be highly beneficial, as stress often manifests itself as muscular tension. I do know that tension in cranial muscles can affect auditory perception in the form of deep rumbling/chopping noises.
What they reported
First noticed: 2023
Pitch: 44 hz
Loudest: During the night
Where: Indoors
Symptoms: Sense of vibration
Changes with weather: I can't say that I've ever paid attention weather interactions.
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both described rumbling
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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