What is the typical human ear's audible spectrum and frequency range used for infrasound and ultrasound?

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20Hz to 20kHz and less than 20hz, more than 20 khz respectively

80Hz to 90kHz and more than 20hz, more than 20 khz respectively

20Hz to 50kHz and less than 20hz, more than 20 khz respectively

20Hz to 20kHz and less than 20hz, more than 40 khz respectively

answer is A.

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Detailed Solution

The range of 20Hz to 20,000Hz is easily audible to the human ear.
As a result, audible sound is defined as sound waves with frequencies between 20Hz and 20,000Hz. Ultrasonic frequencies are those exceeding 20,000 Hz. Ultrasound frequencies are inside the dogs' and cats' auditory spectrum. Less than 20 Hz corresponds to the infrasonic range for audible sound waves. Elephants and whales can hear this sound, which is inaudible to the human ear.

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