The “Hum” is a phenomenon, or collection of phenomena, involving widespread reports of a persistent and invasive low-frequency humming, rumbling or droning noise not audible to all people. Community is exposed to consistent and elevated sound levels. This “humming” city noise interferes with normal activities such as sleeping, conversation, or disrupts one’s quality of daily life. The “Hum" application measures and dis-plays the noise levels from several locations for the purpose of envisioning noise pollution of the city.
