Structure of Human Ear

Q. Which part of the human ear converts sound waves into electrical impulses?

1. Anvil
2. Cochlea
3. Stirrup
4. Hammer

Q. Audio frequency range of human ear is 20 Hz to 20000 Hz. What is the range of human ear in terms of time period of the wave.

1. $(5\times {10}^{-5}s,5\times {10}^{-2}s)$
2. $(5\times {10}^{-5}s,5s)$
3. $(5\times {10}^{-5}s,50s)$
4. $(5\times {10}^{-5}s,5\times {10}^{-1}s)$

Q.

Name the various parts of the human ear. [3 MARKS]

Q. In a hearing aid, ___ converts sound waves to electrical signal.

1. microphone
2. speaker
3. transmitter
4. receiver

Q.

Audible frequency range for human being is

1. 20 Hz to 2000 Hz

2. 20 Hz to 20 kHz

3. 20 Hz to 20 MHz

4. 200 Hz to 20000 Hz

Q.

State the main function of:

i)Eustachian tube

ii) Suspensory ligament of the eye

iii) Ear ossicles

Q. Question 22
Explain how the human ear works.

Q.

The main reason why we have two ears is:

1. to increase pitch of sound

2. to improve the quality of sound

3. to serve as a backup if one ear is damaged

4. to determine the direction from which sound is coming

Q.

Explain the structure of the human ear with the help of a diagram.

Q.

Which part of our body vibrates to produce sound when we speak?

1. Larynx

2. Windpipe

3. Vocal cords

4. Tongue

Q. The time in which sound travels to the two ears is always the same.

1. True
2. False

Q. Which of the following consists of a thin membrane in the ear that starts vibrating on receiving sound waves?

1. Pinna
2. Eardrum
3. Ear canal
4. Cochlea

Q. Audible range of frequencies for humans is .

1. 20- 2000 Hz
2. 20-200 Hz
3. 20-20000 Hz

Q. The frequency which is not audible to the human ear is:

1. $50\text{Hz}$
2. $500\text{Hz}$
3. $5000\text{Hz}$
4. $50\text{kHz}$

Q.

The part of the ear that vibrates in response to sound waves is:

1. Cochlea

2. Eardrum

3. Pinna

4. Eustachian tube

Q.

The membrane-like structure in the ear through which we hear sound is:

1. Larynx

2. Eardrum

3. Voice box

4. Vocal chords

Q.

The cochlea of the ear converts pressure variations of the air into _________.

1. mechanical signals

2. electric signals

3. magnetic signals

4. chemical signals

Q. Which of the following is a part of the middle ear?

1. Hammer
2. Anvil
3. Stirrup
4. All of the above.