Tag: musical sound and scale

Questions Related to musical sound and scale

Select the odd one out (soft horns, ear plugs, silencers, loudspeakers)

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. soft horns

  2. ear plugs

  3. silencers

  4. loudspeakers

Show answer
Correct Option: D
Explanation:

Except loud speaker all are preventive measures of noise pollution while loud speaker creates noise pollution

Unpleasant sound : Noise : : Pleasant sound :______. Fill in the blank. 

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. Audible sound

  2. Infrasound

  3. Music

  4. Ultrasound

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Correct Option: C
Explanation:

Sounds that are unpleasing and disturbing to the ears are called noise, whereas, the pleasing and comforting to the ears are called music, like those produced by musical instruments.

Presence of excessive or unwanted sounds in the environment is called 

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. music

  2. sound

  3. noise pollution

  4. all of the above

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Correct Option: C
Explanation:

Too much and too loud sounds in the environment cause noise pollution. Noise pollution can be harmful for the health of people.

Which of the following are examples of noise pollution?

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. Sounds from factories

  2. Sounds from explosion of fire crackers

  3. Sounds from aircrafts

  4. All of the above

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Correct Option: D
Explanation:

The sounds from factories, fire crackers, aircraft, etc. are much above $80$ dB, which is the level above which noise causes discomfort and becomes physically painful.

What measures must be taken to reduce noise pollution?

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

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

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

  3. Silencing the devices and automobiles making loud noises.

  4. All of the above

Show answer
Correct Option: D
Explanation:

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.

Which of the following are true for noise pollution?
a) Noise pollution is unpleasant and discomforting.
b) Noise pollution can cause health problems.
c) Long term exposure to loud noises can cause temporary or ever permanent hearing impairment.

d) Noise pollution is caused by extremely loud sounds.

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. a and d

  2. b and c

  3. a, b and d

  4. All of the above

Show answer
Correct Option: D
Explanation:

Noise pollution is caused by extremely loud sounds and is very discomforting and painful for the ears. It may also cause health problems like hypertension, lack of sleep, anxiety and many more. Also, continuous exposure to loud sounds can cause temporary or permanent hearing defect.

Which of the following measure can be taken to control noise pollution in our surroundings?

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. By using silencers in vehicles

  2. Planting trees

  3. Using noise mufflers

  4. All

Show answer
Correct Option: D
Explanation:

Noise pollution can be reduced by using silencers in vehicles, industrial machines, and home appliances reducing use of vehicle horns, running TV, radio and music systems at low volumes. Planting of trees along roads and buildings also help to reduce noise pollution.

Noise pollution can be harmful to human beings because:

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. it can cause hearing loss

  2. it can cause sleeplessness

  3. can cause hypertension

  4. all

Show answer
Correct Option: D
Explanation:

Noise pollution can lead to a number of health-related problems. Some of them are as follows:
(i) Hearing loss

(ii)inability to sleep    
(iii) Hypertension
(iv) Severe headache 
(v) Stress

Why Trees are  planted along the roads?

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. To make the roads beautiful.

  2. To reduce noise pollution.

  3. To provide shade.

  4. All of the above

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Correct Option: D
Explanation:

Trees absorb the sound vibrations produced by various sources and hence leading in prevention of noise pollution. It also provide shades and make the roads beautiful.

Which of the following is not a characteristic of a musical sound?

physics sound and noise musical sound and scale pleasant, unpleasant sounds and noise pollution sound noise and pollution

  1. Pitch

  2. Wavelength

  3. Quality

  4. Loudness

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Correct Option: B
Explanation:

Wavelength is not a characteristic of musical sound. Pitch, Quality and Loudness are all characteristics of a musical sound.