Tag: study of sound

Questions Related to study of sound

Which part of the ear vibrates when sound waves enter our ear?

how humans hear sound human ear study of sound sound physics

  1. Ear canal

  2. Eardrum

  3. Pinna

  4. Cochlea

Show answer
Correct Option: B
Explanation:

Ear canal is provides the path to sound to ear .

Pinna collects the sound .
Cochlea transforms the sound in neural message .
Eardrum vibrates when sound wave strikes them .

Sound enters inner ear through

how humans hear sound human ear study of sound sound physics

  1. ossicles

  2. ear drum

  3. cochlea

  4. none of these

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Correct Option: A
Explanation:

Sound waves or vibrations enter the inner ear through middle ear bones or ossicles.

We find it difficult to hear if we put cotton in our ears. This is because

how humans hear sound human ear study of sound sound physics

  1. cotton damps the sound wave before reaching the ear drum

  2. cotton creates a vacuum in the ear

  3. cotton conducts the vibration to the ear drum

  4. none of the above is true

Show answer
Correct Option: A
Explanation:

Cotton, put inside ear, damps  the vibration entering the ear. So, when the damped sound reaches the eardrum, its vibration becomes lower than original. So, we find it difficult to hear.

A very loud sound

how humans hear sound human ear study of sound sound physics

  1. damages the hair cells of the inner ear

  2. damages the outer ear

  3. damages the middle ear

  4. reflects back from the ear

Show answer
Correct Option: A
Explanation:

A very loud sound damages the hair cells of the inner ear. The hair cells die and stop sending sound signals to the brain. Once damaged, these hair cells do not grow back.

Highest loudness of sound causing no harm to the ear is

how humans hear sound human ear study of sound sound physics

  1. 67 dB

  2. 650 dB

  3. 65 dB

  4. 20000 dB

Show answer
Correct Option: C
Explanation:

65 dB loudness causes no harm to human ears. But the damage occurs if the loudness exceeds 65 dB.

The response of human ear to sound in terms of its shrillness is known as:

how humans hear sound human ear study of sound sound physics

  1. frequency

  2. pitch

  3. loudness

  4. amplitude

Show answer
Correct Option: B
Explanation:

Pitch is known as the response of human ear to sound in terms of its shrillness.

Why can't we hear the scream of bat?

how humans hear sound human ear study of sound sound physics

  1. Because its scream consists of infrasonic sound

  2. Because its scream consists of ultrasonic sound

  3. Because its scream consists of subsonic sound

  4. None of these

Show answer
Correct Option: B
Explanation:

Bats produce ultrasonic sound and thus humans cannot hear them. Bats emit sound in the range of $20,000$ to $100,000\ Hz$ which is beyond our audible range.

What is conductive hearing loss?

how humans hear sound human ear study of sound sound physics

  1. When outer or middle ear leads to problem and inefficient transfer of sound

  2. When inner ear leads to problem and inefficient transfer of sound

  3. When only middle ear leads to problem and inefficient transfer of sound

  4. When inner and middle ear leads to problem and inefficient transfer of sound

Show answer
Correct Option: A
Explanation:

When outer or middle ear gets damage causing insufficient transfer of sound to inner ear.

Which of the following is / are true?

how humans hear sound human ear study of sound sound physics

  1. the inner ear consists of a cochlea, the semicircular canals and the auditory nerve

  2. the middle ear is an air filled cavity that consists of an ear drum and three tiny interconnected bones the hammer, anvil and stirrup

  3. the human ear consists of three basic parts - outer ear, middle ear and inner ear

  4. all of these

Show answer
Correct Option: D
Explanation:

All of the options are correct.

The inner ear consists of a cochlea, the semicircular canals and the auditory nerve.
The middle ear is an air filled cavity that consists of an ear drum and three tiny interconnected bones the hammer, anvil and stirrup.
The human ear consists of three basic parts - outer ear, middle ear and inner ear.

How many inner and outer hair cells does a normal human ear possess?

how humans hear sound human ear study of sound sound physics

  1. 25000

  2. 30000

  3. 27000

  4. 50000

Show answer
Correct Option: A
Explanation:

A normal human ear possess nearly 25000 hair cells.