A low, vibrating hum that reverberates inside a cabin and can feel like it's traveling through your skull . 3. Artistic and Metaphorical "Hum"
A persistent, vibrating rumble that feels more like a physical sensation than a heard sound . It is often compared to a distant diesel engine idling in the distance . 2. Mechanical or Industrial Hum
This refers to a mysterious, invasive low-frequency humming reported worldwide, such as the Taos Hum or the Windsor Hum .
