How Do We Hear

Q.

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

1. Pinna

2. Cochlea

3. Eustachian tube

4. Eardrum

Q. In a dholak, sound is produced due to vibration of its

1. membrane
2. air column
3. string
4. spring

Q. The intensity of sound is measured in ____.

1. kilogram (kg)
2. litre (l)
3. decibel (dB)
4. metre (m)

Q.

What is another name for tympanum?

Q. Wave in which particles oscillate along the direction of wave propagation is known as ___.

1. longitudinal wave
2. mechanical wave
3. non-mechanical wave
4. transverse wave

Q.

Why is sound measured in $dB$?

Q.

Bel is the smaller unit and DB is the larger unit to measure the intensity of the sound.

1. True
2. False

Q.

Sound travels faster in _________ than in liquids.

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

1. Pinna
2. Eardrum
3. Cochlea

Q.

Sound travels fastest in

1. liquids

2. solids

3. gases

4. vacuum

Q. The function of the three small bones in middle ear is to:

1. Protect the ear
2. Enhance the vibrations reaching middle ear
3. Produce sound inside the ear
4. Produce hormones essential for hearing

Q.

The ear performs two functions ____ and ____.

Q.

Consider iron and water. In which of the given media does the sound travel faster?___

Q. The approximate length of vocal cords in men is ___.

1. $5mm$
2. $15mm$
3. $20mm$
4. $10mm$

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.

state weber-fechners law relating intensity and loudness of soud.

Q. is the velocity of sound temperature dependent? if yes , write the relation