GENERAL KNOWLEDGE

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GK

PHYSICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If you roll a large sheet of paper into a funnel, you can hear the sound better. This process of increasing the loudness of a sound is called ____
A
measuring a wave.
B
absorption.
C
reflection.
D
amplification.
Explanation: 

Detailed explanation-1: -amplify: To increase the loudness of a sound.

Detailed explanation-2: -Sound waves enter the outer ear and travel through a narrow passageway called the ear canal, which leads to the eardrum. The eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear. These bones are called the malleus, incus, and stapes.

Detailed explanation-3: -Increased frequency means decreased wavelength and higher pitch/ sharpness. So increase in frequency makes sound more sharper while higher amplitude or higher intensity makes louder sound.

Detailed explanation-4: -The amplitude of sound determines the loudness of sound. A sound that is faint will have a small amplitude while that of a loud sound will have larger amplitude.

Detailed explanation-5: -Loudness is proportional to the square of the amplitude. Thus, if the amplitude is increased by three times, the loudness also increases by nine times.

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