In order to reduce the dangers associated with changing stations while driving, in the United States they have already invented a voice-activated channel changer; some radio stations even sell radios that are set to their station and cannot be adjusted.
為了降低開車族開車時轉換電台的危險性，美國已經發明用「說話」、語音辨識的方式，來轉換電台頻率；許多電台更販售只播自己頻道的設定型收音機。