These two words sound close to each other.

这两个词听上去几乎一样。

youdao

Check that the doors, hood and trunk all open smoothly and close with solid sound.

检查（车）门、发动机罩和后备箱打开是否平稳，关闭是否牢固。

youdao

A special chip called a digital signal processor analyses the incoming sound from microphones placed close to the dental drill.

在牙钻附近安置了麦克风，一种称为数字信号处理器的特殊芯片会对麦克风中获取的声音进行分析。

youdao

Getting that sound means getting in close, which I don't mind doing.

NPR: Recording Story Rattles Producer

"HD Voice, " also known as wideband audio, is a technology designed to make a caller's voice, and other noises, sound on phone calls as close as possible to how they do in person.

CNN: Coming to your phone: High-definition voice

At close range, the sound from these devices can be terrifying and painful.

NPR: Focused Sound 'Laser' for Crowd Control