Coloring background voice service is defined as the playing of specific background music during the calling of mobile subscribers.

背景音业务指电话用户在双方通话的过程中，由系统播放特殊的背景音效果。

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Kate heard a man's voice in the background, but she couldn't make out what he was saying.

凯特听到后面传来一个男人的声音，但她听不清他在说什么。

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The only backing music is a keyboard playing seemingly random notes, and a voice in the background with some effects.

唯一的背景音乐是似乎弹奏出随机音符的键盘，以及一些略带特效的背景声音。

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Customers can also stay in touch via video chat, while enjoying excellent voice quality with reduced background noise through the built-in digital microphone.

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All of a sudden, we hear a familiar voice singing beautiful harmony in the background.

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Voice Focus ensures precisely targeted voice pick-up, while Noise Reduction enables clear conversations without background noise interference.

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