Sound Test

Result

Sound Test - 29

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Weekly Quiz Competition

Question 1
1 / -0

(7) Which is an undesirable sound and harmful for health.

A
Noise

B
Echo

C
Music

D
None of the above

Solution

Noise is described as any disturbing or unwanted sound that interferes with or harms human health or wildlife. Sound levels between 120 dB and 140 dB can cause pain, and sound levels over 137 dB can cause an acoustic shock (sudden hearing loss).
Question 2
1 / -0

(6) I am the kind of sound produced by earthquakes.

A
Infrasonic sound

B
Ultrasonic sound

C
Audible sound

D
None of these

Solution

Sounds of frequencies below $$20\ Hz$$ are called infrasonic sound or
infrasound Earthquakes produce low-frequency infrasound before the main shock waves begin.
Question 3
1 / -0

The pitch is determined by the _________________ of the vibrating body.

A
Frequency

B
Amplitude

C
Speed

D
Loudness

Solution

Pitch of sound depends upon frequency of vibrating body. A high frequency produce a high pitched sound and a low frequency produces a low pitched sound.Hence pitch depends on frequency of vibrating body.
Question 4
1 / -0

Sound of frequency below 20 Hz is called

A
Audio sounds

B
Infrasonics

C
Ultrasonics

D
Supersonics
Question 5
1 / -0

How do plants help for reducing noise pollution?

A
By osmosis

B
By reflecting sound

C
By absorbing sound

D
By passing it through water

Solution

Vegetation reduces noise pollution through a phenomenon called sound attenuation, which is the reduction of sound intensity. Leaves, twigs, and branches on trees, shrubs, and herbaceous growth absorb sound energy.
Question 6
1 / -0

Which graph represents music ?

A
$$(i)$$

B
$$(ii)$$

C
Both $$(i)$$ and $$(ii)$$

D
None of the above

Solution

Wave pattern is regular in music which feels pleasant to listening while it is quite irregular in noise which creates irritation.
Graph (i) represents wave pattern of music
Graph (ii) represents wave pattern of noise
Question 7
1 / -0

Sound cannot pass through me.I am?

A
Vacuum

B
Glass

C
Water

D
Wood

Solution

Sound is a mechanical wave.And mechanical waves needs a material medium to carry it's vibrations .So sound requires a medium to propagate.And vaccum is just empty space , it does not have any medium .So sound cannot pass through vaccum.
Question 8
1 / -0

Which sound property determine 'Loudness'?

A
Amplitude

B
Frequency

C
Wavelength

D
Speed

Solution

Loudness of sound means how much is the intensity of sound produced.
Loudness of sound wave is directly proportional to square of amplitude of vibration of sound source.Hence amplitude determine loudness.
Question 9
1 / -0

Match the following and choose the correct option
A String vibration 1. Tabla
B Membrane vibration 2. Cymbals
C Vibration of air 3. Sitar
D Vibration of plate 4. Flute

A
A-I, B-2, C-3, D-4

B
A-2, B-1, C-4, D-3

C
A-3, B-1, C-4, D-2

D
A-4, B-3, C-2, D-1

Solution

Sitar - In Sitar, the string vibrates and produces sound.
Flute - In a flute, the air inside the flute vibrates and results in the production of sound.
Tabla - In tabla, when struck by hand, the membrane vibrates which results in the production of sound.
Cymbals- In cymbals, sound is produced due to the vibration of its plates.

Hence, the correct option is C.
Question 10
1 / -0

Birds produce sound by using:

A
vocal chord

B
larynx

C
glottis

D
syrinx

Solution

Larynx is the voice box inside human neck, which produces sound. Vocal cords are found inside larynx, and frequency of sound generated depends upon the thickness of vocal cords. Glottis makes several voicing sounds between the vocal folds, when they vibrate. So option (A), (B) and (C) can't be the answer.

Syrinx is the vocal organ of birds which produces the sound in birds . So option (D) is correct.

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Re-Attempt Weekly Quiz Competition

A	String vibration	1.	Tabla
B	Membrane vibration	2.	Cymbals
C	Vibration of air	3.	Sitar
D	Vibration of plate	4.	Flute

Sound Test - 29

Result

Sound Test - 29

Score

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Rank

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SHARING IS CARING

Question 1

Noise

Echo

Music

None of the above

Solution

Question 2

Infrasonic sound

Ultrasonic sound

Audible sound

None of these

Solution

Question 3

Frequency

Amplitude

Speed

Loudness

Solution

Question 4

Audio sounds

Infrasonics

Ultrasonics

Supersonics

Question 5

By osmosis

By reflecting sound

By absorbing sound

By passing it through water

Solution

Question 6

$$(i)$$

$$(ii)$$

Both $$(i)$$ and $$(ii)$$

None of the above

Solution

Question 7

Vacuum

Glass

Water

Wood

Solution

Question 8

Amplitude

Frequency

Wavelength

Speed

Solution

Question 9

A-I, B-2, C-3, D-4

A-2, B-1, C-4, D-3

A-3, B-1, C-4, D-2

A-4, B-3, C-2, D-1

Solution

Question 10

vocal chord

larynx

glottis

syrinx

Solution

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