Health What is The Hum? Explaining the Mysterious Low-Frequency Noise by Dr Natalie Singh - Health Editor July 19, 2026 by Dr Natalie Singh - Health Editor July 19, 2026 The "Hum" is an unexplained, low-frequency buzzing or humming noise reported by an estimated 2% to 4% of the global population. While often perceived as an external sound, researchers largely … 0 FacebookTwitterPinterestEmail