CEA-861 signals carried by HDMI are electrically compatible with the CEA-861 signals used by the digital visual interface (DVI). No signal conversion is necessary, nor is there a loss of video quality when a DVI-to-HDMI adapter is used.
The Hum is a generic name for a common class of phenomena consisting of a persistent, invasive low-frequency sound from an unknown source. In addition, the phenomena is only audible to certain people, existing at the far low end of the audio spectrum, with a peak power spectral density between about 10 and 60 Hz.
1. a sibilant humming sound, like a bee (also: bzzz, hum) 2. the sound of a buzzer 3. a confusion of activity and gossip, chatter, talk. Also used as a verb the bees were buzzing, he buzzed a servant. human animal tone.