The tests measured rangeofhearing over low, mid and high noise frequencies.
这些测试测量了对低、中、高频率噪声的听觉范围。
2
These high intensity ultrasonic sound waves (20 ~ 65khz) are out of the rangeofhearing of humans are most household pets, but pests.
这些高强度的超声波(20 ~ 65khz)不在人类和大部分家养宠物的听觉范围内，但能被害虫听到。
3
The cones of larger loudspeakers used in traditional public-address systems vibrate more slowly, making them better suited for sounds in the rangeof human hearing.