Question

Q. No. 2 Answer in short.


1) What is noise pollution? What precautionary measures have to be taken to control noise pollution?

2) What are the factors on which loudness of a sound depends?

3) The speed of sound depends on the type of medium and the temperature of the medium. How?​

Answer 1

1) Any disturbing or unwanted noise that interferes or harms humans or animals is said to be as noise pollution. It has negative impacts on wildlife species by reducing habitat quality, increasing stress levels, and masking other sounds. We can control noise pollution by taking few measures like by turning off appliances when not in use, use of earplugs, lowering the volume, planting more trees, regular maintenance of vehicles and machines etc.

2) Loudness of the sound depends upon the area of a vibrating body. It also depends on the distance between the listener and the source of the sound.

3) Sound travels faster at higher temperatures and slower at lower temperatures. Solids are much more elastic than liquids or gases, and allow sound waves to travel through them very quickly, at about 6000 feet per second. Thus, the speed of sound depends on the type of medium and the temperature of the medium.

Answer 2

Explanation:

answer 1

Noise pollution can be defined as any disturbing or unwanted noise that interferes or harms humans or wildlife.

step to control noise pollution

1. lower the volume
2. follow the limit of noise level
3. stay away from noisy area
4. tune of unwanted appilances
5. planning tree

answer 2

The loudness of sound is a phenomenon of a sound depending on the amplitude of the sound wave. If the amplitude of the sound wave is large, then the sound is said to be loud. The loudness of sound is directly proportional to the square of the amplitude of vibration and it is expressed in decibel . Sounds above 80 dB becomes noise to human ears.

answer 3

The speed of sound in a particular medium depends on temperature and pressure of that medium. The speed of sound decreases when it passes from solid to gaseous state of a given medium. In any medium, if the temperature increases, the speed of sound also increases

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