Because human ear has a limitation of hearing sounds only of such a band of frequencies. we call them as audio frequencies.
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.
we know that human ear can not hear sounds of frequency less than 20Hz or more than about 20,000 Hz . Sounds of frequency higher than 20,000 Hz , which are inaudible to human ear, can be produced and are utilized in many useful ways. Such sounds are called ultrasonics
Range of frequency associated with infrasound is less than 20Hz.
Inaudible sounds are sounds that you cannot hear. Audible sounds are sounds that you can hear. Frequencies capable of being heard by humans are called audio or sonic. The range is typically considered to be between 20Hz and 20,000Hz.[3] Frequencies higher than audio are referred to as ultrasonic, while frequencies below audio are referred to as infrasonic
inaudible
an inaudible whisper
No, actually they hear less than humans. They can hear frequencies beetwen 400Hz and 2000Hz, as humans can hear a bigger interval, from 20Hz to 20000Hz
inaudible
Inaudible means there is no noise Inaudible means there is no noise
what does the word inaudible mean
She made an inaudible sound begging for help.That TV has an inaudible sound, you can't hear anything.
Example sentence - Her voice was inaudible the majority of the time.