Direction Answer the questions on the basis of your understanding of the following passage and re...

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Direction Answer the questions on the basis of your understanding of the following passage and related studied concepts:
Hearing range describes the range of frequencies that can be heard by humans or other animals though it can also refer to the range of levels.
Table: Range of frequency of sound

1c Frequency

Audible range for human 20 ย Hz to 20000 ย Hz

Infrasonic sound less than 20 ย Hz

Ultrasonic sound greater than 20 kHz


People with hearing loss need a hearing aid. A hearing aid is an electronic, battery operated device. The hearing aid receives sound through microphone using this hearing aid people able to hear clear sound.
In which range, whales and elephants produce frequency of sound?

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