This too causes the waveform to lose energy as well as, in turn, frequency and pitch, resulting in you hearing a distorted, lower tone than what people hear directly from out of your mouth.

这同样使声波能量降低，随之带来音调和音高的降低，使得我们自己听到的声音远低于周围人直接听到的声音。

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Auditory fusion frequency (AFF) of impulse sound and paired pitch in 80 workers exposed to noise and 60 non exposed ones were measured to study the relationship between AFF and auditory fatigue.

为探讨闪声融合频率与听觉疲劳的关系，测量了80名接触噪声工人和60名非接触噪声人员的脉冲声和双音调闪声融合频率。

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The weak intonation is shown in the following features: low fundamental frequency, narrow pitch range, and the rising of boundary tone.

祈使句语气的弱化通常体现在以下几个方面：降低基频、缩小基频范围、以及抬高边界调。

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