@omega3
To be sure --It is very helpful to sit quietly in other people’s houses or stay overnight elsewhere. If the hum doesn’t follow you,( and you say it doesn't) then that’s useful information and can point back to the house rather than your ears. If the HUM doesn't follow you then it is your home not tinnitus. It could be electrical, structural plumbing, etc., noises in, or nearby, your home that you are particularity sensitive to. The HUM caused by conditions in a home have been documented -it's not considered a sanity, neurological, or prescription related experience. Here's information on how to check what may be cause in your home. Best to follow up with an audiologist to make sure. Specifically, they can:
• Test low-frequency hearing sensitivity
• Assess bone-conduction vs air-conduction
• Look for unusual auditory thresholds others might not have
• Evaluate auditory filtering (how well the brain suppresses background noise)
• Distinguish environmental perception from classic tinnitus patterns