sonicsoundwaves

因此我們最好將ultrasonic frequency=supersonic frequency一律翻譯為「超音頻」，將ultrasonics一律翻譯為「超音波學」。 而音速(sound velocity=sound speed=sonic ...

Sonic waves: The human ear can easily perceive frequencies ranging from 20 Hz to 20 kHz . As a result, audible sound is defined as sound waves with ...

A sonic boom is a sound associated with shock waves created when an object travels through the air faster than the speed of sound. Sonic booms generate ...

Sonic and ultrasonic weapons (USW) are weapons of various types that use sound to injure or incapacitate an opponent. Some sonic weapons make a focused beam ...

2022年7月9日 — Ultrasonic waves are sound waves with frequencies above the upper limit of a human's audible range (>20 kHz). Sonic means the audible ...

6 天前 — Ultrasonics, vibrations of frequencies greater than the upper limit of the audible range for humans—that is, greater than about 20 kilohertz ...

Sound wave is a vibration that is transmitted through a medium, such as air, water, and metals. Ultrasonic wave is defined as “inaudible sound with high ...