n.赫，赫兹(声波频率单位)

The frequency of the radio wave is measured in hertz (Hz).
这个无线电波的频率是以赫兹（Hz）为单位来测量的。
The sound wave has a frequency of 440 hertz, which corresponds to middle A on a piano.
这个声波的频率是440赫兹，对应于钢琴上的中音A。
The human ear can typically detect sounds ranging from about 20 hertz to 20,000 hertz.
人的耳朵通常能探测到大约从20赫兹到20,000赫兹的声音范围。
The computer's processor operates at a speed of 3.5 gigahertz.
这台计算机的处理器运行速度为3.5千兆赫。
The heart rate of an adult at rest is usually between 60 and 100 beats per minute, or 1 to 1.67 hertz.
成年人在静息状态下的心率通常介于每分钟60至100次，即1到1.67赫兹。
In electrical engineering, the term "hertz" is used to express the cyclic rate of alternating current (AC).
在电气工程中，“赫兹”用于表示交流电的周期性速率。
The signal emitted by this device oscillates at a rate of 50 hertz.
该设备发出的信号以50赫兹的频率振荡。
Scientists measure地震波的速度 in units of hertz to understand seismic activity better.
科学家用赫兹作为单位来测量地震波的速度，以便更好地理解地震活动。
The Hz measurement for the flicker fusion threshold varies depending on the individual's visual acuity.
对于闪烁融合阈值的Hz测量结果会因个人视力的不同而变化。
The light emitted by a laser can have a very narrow spectral linewidth, with a coherence length corresponding to frequencies as high as terahertz.
激光发出的光具有非常窄的谱线宽度，其相干长度对应着高达太赫兹的频率。