Noise pollution
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This document discusses noise pollution, including its sources and impacts. It defines noise and sound, and explains that noise originates from human activities like urbanization, transportation, and industry. It identifies common sources of noise pollution such as households, transportation, construction sites, and industrial and social activities. The document also outlines the health and environmental impacts of noise pollution and methods for controlling noise at its source and along transmission paths.
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Noise pollution
- 2. CONTENTS: 1. Noise vs sound 2. Sound wave frequency 3. Sources of noise pollution 4. Impact of noise 5. sound levels 6. Controlling noise pollution
- 3. The noise originates from human activities, especially the urbanization and the development of transport and industry POLLUTION
- 6. •Location •Time of the day •The magnitude of sound •desirability of sounds •Duration
- 8. Sources of noise pollution household transportation Industrial Activities Construction Sites Social Events
- 9. Impacts of noise : •Effects on general health •Damage to material •Marine Animals
- 10. Sound levels (measured in dB units) •According to (WHO) 45 dB in city •65 dB can be tolerable •100:120 dB uncomfortable •130:140 dB painful “Damaging levels of sound” Max. allowable durationSound in db 3.5 minday130 30 minday110 2 Hrday100 8 Hrday90
- 11. Principle of Controlling noise
- 12. Control at source •Reducing the noise levels from domestic sectors •Maintenance of automobiles and machines •Control over vibrations •Prohibition on usage of loudspeakers •Installing noisy machine with sound absorbing materials
- 13. Control in the transmission path
- 14. PRE SAFE SOUND “PINK NOISE”
- 15. Using protection elements Job rotation Exposure reduction Hearing protection
- 16. Metal to metal contact Engine vibration Cooling fan Sound fluctuation bet. metals
- 17. Thank you
Editor's Notes
- “Pollution means any contamination of air, soil, water and environment. ,Even loud noise and sound is also a part of pollution.” وتبين أن لهذه المشكلة صلة كبيرة بعدد من الأمراض من جهة كما أن لها تأثيرات سلبية واضحة علي التحصيل العلمي والدراسي والإنتاج وحتي في معدلات الجرائم . الطلبة الذين يدرسون في أمكنة يكثر فيها التلوث الضوضائي يتأثرون دراسيا فتهبط معدلات تحصيلهم العلمي ناهيك عن تأثير الضوضاء علي العاملين في المصانع لا سيما قرب الآلات التي تحدث ضوضاء شديدة .
- In this type of pollution contaminants are not physical particles, but waves which interfere with the naturally occurring waves of a similar type in the same environment.
- rock concert ,,,, whispering conversation in a library or religious sermon. The sound of midday traffic may be acceptable ,,,, same magnitude in the middle of the night. The magnitude of sound Music ,,,, raising the volume of the music too high Several people conversing in a room ,,,, all conversations other than their own as noise. listening to a repetitive sound becomes annoying.
- Sounds produced by all vibrating bodies are not audible. The infrasonic waves are produced by large vibrating bodies. the earthquake Some animals like elephants Ultrasonic (scanning) These waves are used to analyze the development of unborn child. Ultrasonic waves are used for cleaning the hidden parts of an instrument. Ultrasonic waves are used for welding plastics. Ultrasonic waves are used to determine the depth of a sea. (bats and dolphins)
- For example, being pounded by the siren of fire fighters, police or ambulance in your city all night everyday leave people (especially elderly people) stresses and tired in the morning. the buildings and materials may get damaged by exposure to infrasonic / ultrasonic waves and even get collapsed. Many marine animals, especially whales, use hearing to find food, communicate, defend and survive in the ocean. Excessive noises are causing a lot of injuries and deaths to whales. For example, the effect of a navy submarine’s sonar can be felt 300 miles away from the source (oil drills, submarines)