What frequency range does ultrasonic equipment operate in?

Ultrasonic equipment operates in a frequency range that is above the range of audible sound. The threshold of hearing for humans typically falls between 20 Hz and 20,000 Hz (20 kHz). Ultrasonic frequencies start from just above this upper limit, generally around 20 kHz and can go up to several gigahertz.

This higher frequency range enables ultrasonic devices to perform various functions, such as deep cleaning, disease control, and even in medical imaging (like ultrasounds), where sound waves above the audible range can penetrate tissues and provide useful diagnostic information. The characteristics of these high frequencies allow for precise applications that would not be possible with audible sound waves, which do not have the same penetrating power or ability to produce the fine detail needed for sophisticated treatments and evaluations in esthetics and medical fields.