Ultrasonic Waves
Introduction: Sound waves with a frequency greater than 20,000 Hz are termed ultrasonic waves. The audible range is between 20 and 20,000 Hz. The frequency below 20 Hz is the infrasonic wave. Let us look into some properties of ultrasonic waves. Approximate frequency ranges corresponding to ultrasound, with a rough guide of some applications [2] Require a material medium to travel They are reflected, refracted, and absorbed like ordinary sound waves. Possess very high energy Can be transmitted over long distances without much loss of energy [2] The frequency (20 kHz) is the approximate upper audible limit of human hearing in healthy young adults. The upper-frequency limit in humans (20 kHz) is due to limitations of the middle ear. Auditory sensation can occur if high‐intensity ultrasound is fed directly into the human skull and reaches the cochlea through bone conduction without passing through the middle ear. [4] Humans Children can hear some high-pitched sounds that older adul