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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 garyfirestorm on Sunday October 11, 2020 @11:58AM (#24746662)
Yeah you'd need PCB mics with reference level sensitivity. They cost over 800$ and the equipment that measures the noise costs in thousands.
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