For example, a film-maker might opt to include the backgroundsound of an ambulance's siren while the foreground sound and image portrays an arguing couple.
例如，电影制作人可能会选择在背景中加入救护车的警笛声，而在前景的声音和图像中表现一对争吵的夫妇。
2
The microphone has noise canceling to diminish backgroundsound, so people can hear you clearly when they are supposed to.
耳机的话筒内含背景降噪功能，让对方能如愿地听到您清畅的语音。
3
Based on the backgroundsound, the speaker's tone and intonation, the location of the conversation and the relationship between the speaker and the speaker are inferred.