The first point I'd like to address is loudness.
我想说的第一点是响度。
The loudness, I mean in the west happiness is not loud.
在西方，高兴并不意味着要大声讲话。
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。
Unfortunately, the human ear does not judge clearly the degree of loudness of a noise.
很不幸，人类的耳朵并不能清楚地判断噪音的大小程度。
Unfortunately, the human ear does not judge clearly the degree of loudness of a noise.
很不幸，人类的耳朵并不能清楚地判断噪音的大小程度。
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