Fill in the blanks with the correct words.
1. Sound is produced because of .................... (vibrations/refractions).
2. Sound travels through air by means of .................... (compressions/depressions) and .................... (rarefactions/refractions).
3. Sound needs a .................... (medium/vacuum) to travel.
4. The .................... (pinna/ear drum) collects sound waves and directs them to the ear tube.
5. The speed of sound is .................... (same/different) in different substances.

Open in App

Solution

Sound is produced because of vibrations.

Sound travels through air by means of compressions and rarefactions.

Sound needs a medium to travel.

The pinna collects sound waves and directs them to the ear tube.

The speed of sound is different in different substances.

Suggest Corrections

Similar questions

Sound from a flute and sound from a harmonica played by passing air through musical instrument, at same time and same distance from ear and traveling through same medium air, they differ in sounds due to difference in

Q. Fill in the blanks with approriate word:
a. The region in a sound wave, with higher pressure and density is called................ and that with low pressure and density is called........... .

b. Medium is ....................... for generation of sound.

c. The total number of compressions and rarefactions produced per second in a sound wave is 1000. The frequency of the sound wave is.................. .

d. Different sound notes have different.............. .

e. In loudspeaker................energy is converted into..................energy.

Match the following parts of the ear with their functions.

$\begin{matrix} P a r t s o f t h e e a r & F u n c t i o n s 1. P i n n a & A . V i b r a t e s a n d t r a n s m i t s s o u n d w a v e s t o t h e o s s i c l e s 2. T y m p a n u m & B . S e n d s t h e a u d i o i m p u l s e s t o t h e c e r e b r u m 3. E a r o s s i c l e s & C . C o l l e c t s s o u n d a n d d i r e c t s i t i n t o t h e e a r 4. A u d i t o r y n e r v e & D . A m p l i f i e s a n d t r a n s m i t s t h e s o u n d t o c o c h l e a \end{matrix}$

Q. A sound wave is a pressure wave; regions of high (compressions) and low pressure (rarefactions) are established as the result of the vibrations of the sound source. These compressions and rarefactions result because sound :

Q. Match column I with column II and select the correct option from the given codes.

Column I	Column II
A. Pinna	(i) Collects vibrations in the air which produces sound
B. Ear canal	(ii) Passage for sound wave from pinna to ear drum
C. Tympanic membrane	(iii) Transfers sound wave to ear ossicles
D. Ear ossicles	(iv) Increases the efficiency of transmission of sound waves to the inner ear
E. Cochlea	(v) Has hearing receptors
F. Eustachian tube	(vi) Equalises the pressure on both sides of ear drum
G. Auditory nerves	(vii) Impulse transfer from organ of Corti to auditory cortex in temporal lobe of cerebrum

Join BYJU'S Learning Program

Sound is produced because of vibrations. Sound travels through air by means of compressions and rarefactions. Sound needs a medium to travel. The pinna collects sound waves and directs them to the ear tube. The speed of sound is different in different substances.

Sound is produced because of vibrations.

Sound travels through air by means of compressions and rarefactions.

Sound needs a medium to travel.

The pinna collects sound waves and directs them to the ear tube.

The speed of sound is different in different substances.