Is ultrasound harmful to the human body?

Ultrasonic waves are sound waves with a frequency higher than 20000 Hz, not infrasound waves, not electromagnetic waves or particle streams (X-rays). Ultrasound is also divided into low frequency and high frequency.

As we all know, the sound waves that human ears can hear are 0.02KHz-20KHz, and those higher than 20KHz are called ultrasonic waves. The frequency control of our household ultrasonic cleaning is 40KHz, the frequency of industrial ultrasonic is generally about 15-28KHz, and the frequency of medical ultrasonic inspection is above 3000KHz. From the analysis of the frequency range, it can be seen that the frequency of household ultrasonic cleaning is higher than the frequency of industrial cleaning but lower than that of medical ultrasonic. In medicine, the frequency range of ultrasound is generally much higher. At present, there is no medical ultrasonic examination on the human body. Hazards have been produced, and no harm to the human body caused by ultrasonic cleaning has been found.

Expert advice: Don’t worry. Ultrasound is the same as ordinary sound waves. As long as its intensity is controlled within a safe range, there will be no harm to the human body. So far, medical ultrasound examinations are completely safe, and no examples of injuries have been found.