See also:

Glove compartment ligh
The light in the glove compartment comes on or switches off when its door is opened or closed. ...

Benefits of digital broadcasting
Better sound (FM sounds near CD quality and AM as analogue FM). Some FM frequencies offer a greater number of listening choices through “multicasting” (consisting of a frequency's main cha ...

Sub-channels
Example of an HD Radio station with sub-channels In many cases, a main HD Radio station (FM wavebands only) will also have sub-channels offering additional types of programming or music. In ...