The loudness of the parents' quarrel frightened their children.

父母吵架的噪音吓到了他们的孩子。

The loudness next door made me unable to sleep.

隔壁的吵闹让我睡不着觉。

The loudness of the voice gradually increased to an extent that I could not bear.

声音的响度逐渐升高，到了我无法忍受的程度。

A gradual decrease in force or loudness.

渐弱力量或音量的逐渐减弱。

Loudness is measured in units called decibels.

音量以分贝作为衡量单位。

Gets and sets the base volume (loudness) level of the voice.

这个基地的体积大小水平声音。

The decibel is the unit used to measure the loudness of sound.

分贝是用来测定声音大小的单位。

Inflection — a change in the pitch, tone, or loudness of the voice.

使变音，改变(声音的)音调；使词发生屈折变化；变词形。