Human Ear

Q.

Draw a neat and labelled diagram of the human ear. Explain it working.

Q. What do you mean by audible and inaudible sound?

Q.

Name the three tiny bones present in the middle part of ear.

Q.

We must never put sharp, pointed objects into our ears as the eardrum can get damaged.

1. Interpret

2. Interference

Q.

Noise pollution is created if noise is in excess to:

1. 40 - 65 dB

2. 50 - 60 dB

3. 70 - 75 dB

4. 80 - 99 dB

Q.

How is the sound produced and how is it transmitted and heard by us?

Q. The following figure depicts the structure of a human ear with some of its parts denoted by numbers.

Which of the following is an incorrect labelling of the parts?

1. 2 $\to$ Ear drum
2. 1 $\to$ Ear canal
3. 3 $\to$ Cochlea
4. 4 $\to$ Auditory nerve

Q. Sound vibrations are converted into electrical signals by present in the ear.

1. ossicles
2. outer
3. cochlea
4. inner
5. middle
6. eardrum

Q.

Name the organs of hearing in our body.

Q.

What is the function of three tiny bones in the ear?

Q.

Explain the mechanism through which a sound produces a nerve impulse in the inner ear.

Q.

Statement 1: Sound vibrations make the ear drum vibrate which further sends vibrations to the inner ear.
Statement 2: Ear drum is a thin stretched membrane.

1. Both the statements are false.

2. Both the statements are true.

3. Statement 1 is true but statement 2 is false.

4. Statement 1 is false but statement 2 is true.

Q.

What is the name of passage in the outer ear which carries sound waves to the eardrum?

Q. collects and directs sound waves towards eardrum.

1. Pinna
2. Ossicle
3. Cochlea

Q. Sound waves are amplified by the tiny bones present in the

1. outer ear
2. middle ear
3. inner ear
4. brain

Q.

Our ears balance our body

Q. What is a stapes

Q.

Name that part of the ear which vibrates when sound from outside falls on it.

Q. Why can't we hear the sound through a matchbox phone when the string is slack and again can hear it when the string is taut?

Q.

There are three small bones in the middle ear.

(a) Name the three bones.

(b) Which of these bones is in touch with oval window ?

(c) Which of these bones is in touch with the ear drum ?

(d) Which bone is in touch with the other two bones ?

Q. Eardrum is also known as ___.

1. 
   pinna
2. 
   cochlea
3. 
   tympanum
4. 
   oval window

Q. Having two ears helps us identify the direction from which sound is coming.

1. True
2. False

Q.

Which is a condition for hearing sound?

1. There should be a vibrating body

2. There should be a material medium for propagation

3. There should be a receiver such as ear

4. All the above

Q.

How is hearing underwater?

Q.

A vibrating body produces________.

Q. collects and directs sound waves towards eardrum.

1. Pinna
2. Ossicle
3. Cochlea

Q. For which range of frequencies, human ears are most sensitive?

1. $2Hz$ to $3Hz$
2. $20Hz$ to $30Hz$
3. $200Hz$ to $300Hz$
4. $2000Hz$ to $3000Hz$

Q. Explain how sound produces by a vibrating objects reaches our ears. What happens after it enters the ear?

Q. Statement I: Sound vibrations make the ear canal vibrate.
Statement II: The eardrum sends vibrations to the middle ear.

1. Both statements are incorrect.
   
2. Both statements are correct.
   
3. Only statement II is correct.
   
4. Only statement I is correct.
   

Q. Which part of the human ear is shaped like a funnel?