Explanation: There are four fundamental ways in which noise can be controlled. a) Reduce noise at the source. b) Block the path of noise. c) Increase the path length. d) Protect the recipient. These four noise controlling ways reduce the noise pollution.

Explanation: The best control method for noise pollution is to reduce the noise levels at the source. We a noise is reduced at the source tan pollution won’t occurrence in the proceeding steps and thus it won’t affect any organisms.

Explanation: In industries, noise reduction can be done by using rigid sealed enclosures around machinery, lined with acoustic absorbing material. Isolated machines and their enclosures from the floor can reduce the noise pollution at the source.

Explanation: Most of the vehicular noise comes from the movement of the vehicle’s tyres on the pavement and wind resistance. Poorly maintained vehicles can also increase the noise pollution in the vehicles.

Explanation: The path of traffic noise can be locked by constructing vertical barriers along the highways. Proper highway planning and design are essential for controlling traffic noise. Establishing lower speed limits for highways also reduced the noise.

Explanation: Noise levels at construction sites can be controlled using proper construction planning and scheduling techniques. Certain techniques should be used in order to reduce the noise generated by machineries. Avoid construction timings during the night in order to disturbed the surrounding places.

Explanation: To block the path of noise, planting trees around houses can be an effective way. In some situations trees will reduce noise levels up to 50% but to be effective we need a trees barrier that is at least 50 feet deep.

Explanation: In Melbourne, Australia a special instrument called as a sound tube is designed. This sound tube reduced the roadway noise without detracting from the area’s aesthetics and thus it lowers the noise pollution.

Explanation: Aircraft noise can be reduced significantly by using quieter jet engines. The old engines which cause more noise should be replaced by the new engines which cause less noise. Altering paths and time of day runway is also reduced the noise pollution.

Explanation: Earplugs reduced the noise pollution which can help humans to sleep peacefully. Earplugs are a cheap drugstore purchase that makes humans sleep by barring the noise. Noise canceling headphones are also used while sleeping to reduce noise.

Explanation: The sound of a car without a muffler chugging down the street reduces the noise pollution. Keeping car in good and quiet working order reduces the amount of noise it generates and thus it gives a great impact on noise.

Explanation: Turning on white noise can reduce the harsh noise. Turn on white noise is a counterintuitive, adding more pleasant noise on top of other noise. For example, the drone of a fan can be a pleasant white noise if you have a quality fan.

Explanation: Enforcement of all noise laws is variable and often subjective. Even where laws exist, municipalities may not have sufficient noise enforcement personnel who are well trained and also a person who is an ability to monitor noise compliance.

Explanation: Drown out the noise with pleasant sounds are a natural choice that serves the purpose to eliminate unpleasant noise while filling the space where sounds that give pleasure. Pleasant music, sounds of ocean, etc are few examples.