The maximum frequency that a human adult's ear can hear is about 16 kilohertz.

而成年人能听到的最高频率不过约 16 千赫。

The microphones caught sounds at a frequency of 40 to 80 kilohertz from the first two groups.

据前两组的麦克风录音显示，这些植物发出了频率在 40 千赫至 80 千赫的声音。

“Sixty kilohertz permeates in a way GPS can't, ” he said.

“60 kHz 的传播方式是 GPS 无法做到的，”他说。

A full-sized ear responds to frequencies between 20 hertz and 20 kilohertz, because of how the hair cells in our cochlea vibrate.

正常大小的耳朵会对20赫兹到20千兹的声音反应，原因在于毛细胞在耳蜗里震动的方式。

This is an equivalent of like a human swimming through the water at very low speeds and the sonors on board are all above a 200 kilohertz limit.

这相当于一个人以极低的速度在水中游泳，船上的声波都超过200千赫兹的限制。

Model tests have shown that frequencies around 1 kilohertz (the preferred bandwidth of seals and toothed whales) can be reduced by up to 22 decibels, at slow speeds.

模型测试表明，在低速下，1千赫兹左右的频率（海豹和齿鲸的首选带宽）可降低多达 22 分贝。

As we've discussed throughout the series, computers have come a long way from mechanical devices capable of maybe one calculation per second, to CPUs running at kilohertz and megahertz speeds.

正如我们在整个系列中所讨论的那样，计算机从每秒只能进行一次计算的机械设备发展到以千赫兹和兆赫兹速度运行的 CPU，已经取得了长足的进步。

" Calls around 22 kilohertz are usually associated with unhappy affect and calls around 55 kilohertz are happy affect." John Neumaier, a professor of psychiatry and pharmacology at the University of Washington.

“22 赫兹左右的通话通常与不愉快的情绪有关，而 55 赫兹左右的通话则与快乐的情绪有关。”华盛顿大学精神病学和药理学教授约翰·纽迈尔 (John Neumaier)。