Sound Test

Result

Sound Test - 18

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Weekly Quiz Competition

Question 1
1 / -0

Voices of men, Women and children different because of:

A
the pitch

B
the length and the thickness of vocal cords.

C
both

D
none

Solution

The voices of men, women and children differ from each other due to the following factors:

(i) The pitch is one of the most essential factors to determine the voice of the individual. For example, men have lower-pitched voices while women have higher-pitched voices.

(ii) Second factor which brings in the difference in the voices is the length and the thickness of vocal cords.
Question 2
1 / -0

A high pitch sound is called a ________ sound.

A
hoarse

B
loudness

C
shrill

D
timbre

Solution

Pitch of sound is measure of frequency. For higher frequency pitch of sound will be high and sound will be shrill.
Question 3
1 / -0

A low pitch sound is called a __________ sound.

A
pulse

B
intensity

C
hoarse

D
quality

Solution

Pitch is a perceptual property of sound that allows their ordering on a frequency related scale. Pitch is a major auditory attribute of musical tones, along with duration, loudness and timbre. A low pitched sound is also called a hoarse sound.
Question 4
1 / -0

If 1500 oscillations are produced in $$5$$ seconds, what is the frequency in hertz?

A
$$300\ Hz$$

B
$$150\ Hz$$

C
$$550\ Hz$$

D
None

Solution

Frequency: Oscillation completed in one second.
In 5 seconds 1500 oscillations are produced
So, in 1 second 1500/5 = 300 oscillations are produced.
Hence, the frequency = 300 Hz.
Question 5
1 / -0

What measures must be taken to reduce noise pollution?

A
Noise creating factories must be set up away from the residential areas.

B
Trees must be planted around buildings to restrict the noise from reaching the buildings.

C
Silencing the devices and automobiles making loud noises.

D
All of the above

Solution

It is very important to reduce noise pollution since it may cause serious health problems. Thus, various methods have to be adopted to reduce noise pollution like minimizing the sound coming from T.V., radio, etc., silencing automobiles, creating factories only in industrial areas, planting trees to block the noise etc.
Question 6
1 / -0

How does Sound produced by humans?

A
In humans sound is produced by the voice box

B
In humans sound is produced by the larynx

C
In humans sound is produced by the upper part of the wind pipe.

D
All

Solution

$$\bullet$$ In humans sound is produced by the vioce box or larynx.
$$\bullet$$ It is the upper part of the wind pipe.
$$\bullet$$ Two vocal cords are stretched across the voice box leaving a narrow slit. When the lungs force air through the slit, it vibrates and produces sound.
Hence option D correct
Question 7
1 / -0

What is the name of the strings which vibrate in our voice box when we talk?

A
Oesophagus

B
Pharyngeal slits

C
Vocal cords

D
None of these

Solution

When we talk, vibrations are produced in our vocal cord. When we touch our throat we can feel the vibrations.
Question 8
1 / -0

To reduce noise pollution, which of the following devices must be installed on the vehicles ?

A
Lights

B
Speedometer

C
Horn

D
Silencer
Solution
- Lights in a vehicle are used to experience the view ahead of vehicle, in low light.
- Speedometer is used to measure the speed of vehicle .
- Horn is used to signal other vehicles, and a horn produces noise pollution.
- Silencer in a vehicle is used to reduce the sound of the engine of vehicle, therefore it must be installed on the vehicles to reduce noise pollution .
Question 9
1 / -0

Why do we not hear the screams of a bat

A
screams are below 30,000Hz

B
the screams are infrasonic

C
the screams are ultrasonic

D
all

Solution

This is because the screams are ultrasonic (above 20,000 hertz) which the human ear cannot hear as humans can only hear the sound in the range of $$20Hz-20,000Hz$$.
Question 10
1 / -0

Which of the following frequency of sound can be heard by a dog but not by a man?

A
$$50,000 \ hertz$$

B
$$15,000 \ hertz$$

C
$$42,000 \ hertz$$

D
None

Solution

A sound of frequency $$42,000 \ hertz$$ can be heard by a dog but not by a man.
The waves having frequency between $$20 \ Hz-20,000 \ Hz$$ are audible to human beings. For dogs, the audible frequency range is $$67 \ hertz - 45,000 \ hertz$$

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Re-Attempt Weekly Quiz Competition

Sound Test - 18

Result

Sound Test - 18

Score

-

Rank

-

SHARING IS CARING

Question 1

the pitch

the length and the thickness of vocal cords.

both

none

Solution

Question 2

hoarse

loudness

shrill

timbre

Solution

Question 3

pulse

intensity

hoarse

quality

Solution

Question 4

$$300\ Hz$$

$$150\ Hz$$

$$550\ Hz$$

None

Solution

Question 5

Noise creating factories must be set up away from the residential areas.

Trees must be planted around buildings to restrict the noise from reaching the buildings.

Silencing the devices and automobiles making loud noises.

All of the above

Solution

Question 6

In humans sound is produced by the voice box

In humans sound is produced by the larynx

In humans sound is produced by the upper part of the wind pipe.

All

Solution

Question 7

Oesophagus

Pharyngeal slits

Vocal cords

None of these

Solution

Question 8

Lights

Speedometer

Horn

Silencer

Solution

Question 9

screams are below 30,000Hz

the screams are infrasonic

the screams are ultrasonic

all

Solution

Question 10

$$50,000 \ hertz$$

$$15,000 \ hertz$$

$$42,000 \ hertz$$

None

Solution

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