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.
v. hummed, humÂ·ming, hums. v. intr. 1. a. To emit a continuous low droning sound like that of the speech sound (m) when prolonged. b. To emit the continuous droning sound of a bee on the wing; buzz.