Why are a US town's residents blaming a bitcoin mine for migraines?

Residents of Granbury, a town in US' Texas, are blaming a bitcoin mine for migraines, hearing loss, nausea and fainting spells that they are experiencing, TIME reported. They reported that a humming sound emanating from air fans at Marathon Digital's mine may be causing the ailments. The sound may be increasing their cortisol and sugar levels and causing the ailments.