noiseless

This new style of air conditioner is noiseless.

这种新型空调没有噪音。

Noiseless apart from the babble of conversations that rise animatedly over the park's laidback soundtrack, it is singularly peaceful for a city centre location.

这里隔离了人们喧嚣的谈话，没有一点噪声——它是市中心唯一一个安宁的地方。