详细英文解释：

A people voice is the voice that someone uses when talking to people who aren't their friends. This voice is automatically happy, nicer and sweeter than their normal voice. It is also often more high pitched. This is often the voice people use when answering a telephone or when working in retail.

中文解释：

指与陌生或不熟的人说话更客气的声音

例句：

She so used her people voice when she was talking to that customer over there. Did you hear how sweet she was? She never sounds like that normally!

当她和那边的客人谈话时她说话十分客气，你听见她的声音又多甜？她的声音从未像那样甜。