20000 Hz Test Tone | 20 kHz sound

20 Hz - 20 000 Hz is the range of sound frequencies audible to humans (and that with a certain degree of convention). Frequencies above 20 kHz are called ultrasound, below 20 Hz - infrasound. Sound with a frequency of 20000 hertz belongs to the upper limit of audibility of the human ear. However, many animals can hear infrasound. Some people use 20kHz sound as a repellent for rats, mice, dogs, moles or even blood-sucking insects. The 20,000 Hz frequency is used for ultrasound examinations - it allows you to get detailed images of human organs. This helps to detect various diseases and pathologies in the early stages and prescribe appropriate treatment. 0:00 Intro 0:23 Start 20000 Hz 02:38 Finish 20000 Hz #testtone