sound 有时是指与“噪音”相对而言的“声音”:

What's the difference between "sound" and "noise"? — A scientist can explain it, but I can't. "声音" 和“噪音” 有什么区别？——科学家能加以解释，我解释不了。

“声音”和“噪音”有什么区别？——科学家能加以解释，我解释不了。voice专指人的声音：

1. He spoke in a quiet[angry] voice. 他用一种平静[生气]的声音说话。

2. She has a very pleasant voice. 她有一种非常悦耳的嗓音。