In video signals (US), Hum modulation is a 60 Hz. interference which manifests as bars of distortion rolling slowly from bottom to top in the picture. This is always a product of A.C. interference in an "active" component (e.g. power supply).
Hum It was created in 1997.
Hum Hindustani was created in 1960.
Hum FM was created in 2005.
Hum TV was created in 2005.
Hum Dekhenge was created in 1985.
I Hum to Myself was created in 1983.
Burey Bhi Hum Bhale Bhi Hum was created on 2009-03-16.
Ho Hum Records was created in 2007.
Beautiful Hum was created on 2008-05-24.
Hum Ladkiyan was created on 2008-10-13.
Maneuvering the Nocturnal Hum was created in 1998.
The Golden Hum was created on 2001-09-18.