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A comment on What is the mysterious 'global Hum' and is it simply noise pollution? (2019). Parent comment

Re:What is the mysterious 'global Hum' and is it simply nois... by seattle_spring on Sunday October 11, 2020 @11:09AM (#24746282)
My guess was cooling systems in general. I lived uphill from a residential complex and the units on the roof pointed directly at my house. The hum drove me nuts, but it was below any legal noise threshold. It was louder inside my house than outside.
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Re:What is the mysterious 'global Hum' and is it simply nois... by garyfirestorm on Sunday October 11, 2020 @12:24PM (#24746890)
Yes resonances are a fun thing. For very little vibration input, you could get exceptionally large acoustic output.
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