语音老师用英语可以称作 "speech teacher"。这个词来源于英语中的 "speech"（语音）和 "teacher"（老师）两个单词。

例句：

My speech teacher is helping me improve my pronunciation.

（我的语音老师正在帮助我改善我的发音。）

I have a speech teacher who teaches me how to speak clearly and confidently.

（我有一位语音老师，教我如何清晰和自信地说话。）

I think everyone can benefit from working with a speech teacher.

（我认为每个人都能从与语音老师合作中受益。）