Noise

Q.

Write five slogans to reduce sound pollution.

Q.

What is oscillation period?

Q.

What do you mean by frequency of sound? What is its SI unit?

Q.

If the amplitude of a sound is tripled, What will be the effect on its loudness?

1. Decreases six times
2. Increases four times
3. Decreases four times
4. Increases nine times

Q.

Number of vibrations completed by a vibrating object per unit is called ___________

Q. Which of the following are the major possible causes for hearing loss?

1. Loud sounds
2. Genetical issues
3. Old age
4. All of the above.

Q. Match the following sounds with their suitable decibels.

1. $140dB$
2. $10dB$
3. $70dB$
4. $30dB$

Q. Ultrasonic sound have frequency ___.

1. below 20 Hz
2. between 2, 000-20, 000 Hz
3. above 20, 000 Hz
4. between 20-2, 000 Hz

Q.

What determines the loudness of a sound? What is the unit of loudness?

Q. Sound which is unpleasant to ears and causes discomfort is called noise.

1. False
2. True

Q. Which of the following is generally not a source of noise pollution in our surroundings?

1. All the above
2. Loudspeakers and crackers
3. Horns of buses, cars and trucks
4. Home appliances such as mixer, desert cooler

Q. Which of the following are sources of noise pollution?

1. Crackers
2. Silencers
3. Heavy machines
4. Loud speakers

Q. Which of the following methods/devices/practices help in reducing noise pollution?

1. Loudspeakers
2. Silence zones
3. Earplugs
4. Old machines
5. Tree plantation
6. Old vehicles
7. Ban on crackers
8. Use of silencers

Q. The pleasant sounds are called _________ .

1. music
2. loudness
3. pitch
4. noise

Q. Continuous exposure to loud sound may cause hearing impairment.

1. True
2. False

Q. Which of the following measures are used for minimizing noise pollution?

1. All of the above.
2. Use soundproof walls
3. Restrict use of crackers
4. Plant more trees

Q. What are the harmful effects of noise pollution?

1. Lack of sleep

2. Hypertension

3. Imapairment of hearing

4. Good hearing capacity