No. Sound ABOVE 20,000 hz is ultrasound.
Sound too low in frequency to hear (~<20Hz) is called infrasound. Sound too high infrequency to hear (~>20kHz) is called ultrasound.
sounds that are below 20hz are called INFRASONIC/Subsonic. These kinds of frequencies are used by the military for experiments. If you used Subsonic Frequencies below 20hz in I-dosing, You would have catastrophic cell death in every organ, causing them to shoot blood up into the mouth, and it also triggers your nerves to preform involuntary muscle movements, and death will come anywhere from 10-20 Sec. In other words, (My favourite phrase about subsonic frequencies,) Hertz Hurts.
20Hz
Ultrasonic sound waves have frequencies higher than the upper limit of human hearing (20 kHz), while infrasonic sound waves have frequencies lower than the lower limit of human hearing (20 Hz). Ultrasonic waves are used in various applications such as medical imaging and cleaning, while infrasonic waves are produced by natural phenomena like earthquakes and some animal communication.
Infrasound typically refers to sound waves with frequencies below the threshold of human hearing, which is generally considered to be below 20 Hz. Thus, the range of frequencies for infrasound is usually from 0.1 Hz to 20 Hz.
Humans can't hear sounds that are below 20Hz (infrasound) or above 20,000Hz (ultrasound). Infrasound is produced by natural phenomena like earthquakes and by some animals, while ultrasound is used in medical imaging and by animals like bats for echolocation.
Sound too low in frequency to hear (~<20Hz) is called infrasound. Sound too high infrequency to hear (~>20kHz) is called ultrasound.
Below a certain frequency you won't hear it- depends on individual but about 20Hz
19hz.
sounds that are below 20hz are called INFRASONIC/Subsonic. These kinds of frequencies are used by the military for experiments. If you used Subsonic Frequencies below 20hz in I-dosing, You would have catastrophic cell death in every organ, causing them to shoot blood up into the mouth, and it also triggers your nerves to preform involuntary muscle movements, and death will come anywhere from 10-20 Sec. In other words, (My favourite phrase about subsonic frequencies,) Hertz Hurts.
If the frequency of a sound wave lies between 20Hz and 20KiloHertz then it is audible by most people.
sound is a mechanical wave.Sound can be of two types :music and noise. sound gets reflected. we need about 300 metres for a good echo to be heard. there are audible and inaudible sounds. audible from 20Hz to 20000Hz.below 20Hz and above 20000Hz are inaudible sounds.There are infrasonic and ultrasonic sounds.
20Hz
The higher the frequency the shorter the wavelength, so by the physics of sound waves, the smaller the objects that can reflect the sound back. Hence using ultrasound, with its very short wavelengths, the better the definition attainable.
Ultrasonic sound waves have frequencies higher than the upper limit of human hearing (20 kHz), while infrasonic sound waves have frequencies lower than the lower limit of human hearing (20 Hz). Ultrasonic waves are used in various applications such as medical imaging and cleaning, while infrasonic waves are produced by natural phenomena like earthquakes and some animal communication.
Infrasound typically refers to sound waves with frequencies below the threshold of human hearing, which is generally considered to be below 20 Hz. Thus, the range of frequencies for infrasound is usually from 0.1 Hz to 20 Hz.
Sound with a frequency lower than about 20 cycles per second, called infrasonic sound. Sound with a frequency higher than about 20,000 cycles per second, called ultrasonic sound. Only those with excellent hearing can perceive sound at these extremes. As we age and as our hearing is damaged by exposure to loud sounds, the frequency range of hearing is reduced. Some animals can hear sounds above and below the range of humans.