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"can't be heard by humans."
Frequencies above 20kHz are not audible to humans. Sounds above this frequency are called ultrasound.
For the human ear, sound is audible in the range of 20 Hz (Hertz) to 20000 Hz. Sounds below 20 Hz are "infrasonic" and have too low a frequency to be heard; sounds above 20000 Hz are "ultrasonic" and are too high a frequency to be heard.
12hz -20000 hz.
Ultrasonic. Or do you mean what causes them : all types of electrical machinery including TV sets, humming birds, mice (singing) insects.
"can't be heard by humans."
Frequencies above 20kHz are not audible to humans. Sounds above this frequency are called ultrasound.
For the human ear, sound is audible in the range of 20 Hz (Hertz) to 20000 Hz. Sounds below 20 Hz are "infrasonic" and have too low a frequency to be heard; sounds above 20000 Hz are "ultrasonic" and are too high a frequency to be heard.
For the human ear, sound is audible in the range of 20 Hz (Hertz) to 20000 Hz. Sounds below 20 Hz are "infrasonic" and have too low a frequency to be heard; sounds above 20000 Hz are "ultrasonic" and are too high a frequency to be heard.
The frequencies (cycles per second) of the audible vibrations are between 20 Hz and 20000 Hz.
typically 20-20000 Hz - but this range will decrease with age
12hz -20000 hz.
typically 20-20000 Hz - but this range will decrease with age
Ultrasonic. Or do you mean what causes them : all types of electrical machinery including TV sets, humming birds, mice (singing) insects.
I think what you mean is: What frequencies correspond to sounds heard by humans ?The answer to that one is different for every individual. A representative bandwidth for humansis commonly considered to be 20 Hz to 20,000 Hz.
Audible sounds - are those that fall within the scope of human hearing. These are sounds that are typically in the frequency range of 50 Hz to 20 kHz. Frequencies below 50 Hz are classed as ULF (ultra-low frequency) sounds. Those above 20kHz are labelled as ultrasonic sounds.
for this answer it's false i made a 90 on this test :)