Noise Pollution & Noise in Construction Engineering

1. NoisePollution
Presented To: DR. Akram

2. • The environment is everything that makes up our surroundings and affects our
ability to live on the earth, the air we breathe, the water that covers most of
the earth's surface, the plants and animals around us.

3. Environmental Problems:
2.Air Pollution1.Water Pollution
3.Soil and Land Pollution

4. 5. Genetic Modification
6. Global Warming

5. Environmental Problems:
7. Overpopulation 8. Urban Sprawl
9. Ozone Layer Depletion

6. 10: Light and Noise Pollution

8. A sound, especially one that is loud or unpleasant or that
causes disturbance.
Also known as environmental noise or sound pollution, is
the propagation of noise with harmful impact on the
activity of human or animal life.
Sound:
Vibrations that travel through the air or another medium and can be
heard when they reach a person's or animal's ear.

9. The most important factors affecting
noise propagation are:
• Type of source
• Distance from source
• Atmospheric absorption
• Wind
• Temperature
• Obstacles such as barriers and buildings
• Ground absorption
• Reflections
• Humidity

10. Noise Measurements:
• The dB level is used to report ambient noise and noise intrusions.
A dosimeter is like a sound
level meter except that it
stores sound level
measurements and
integrates the
measurements over time,
providing an average noise
exposure reading for a
given period of time, such
as an 8-hour workday.

11. Calibration
1. Insert instrument microphone into
the calibrator.
2. Turn on instrument and set it to
read on the 'A scale' and at the 'slow
response' setting. If you are using a
dosimeter, switch it to Sound Level
Meter (SLM) Mode.
3. Turn the calibrator to the lowest dB
level. What is the Noise Level ?Your
instrument should read within ± 1
dBA of the level indicated on the
calibrator.

12. Noise Measurements:
Adding

13. Noise Measurements:
Subtract

14. Noise Dose is a Combination:
• Intensity of Noise (how loud)
• Duration of Noise Exposure (how long)
• Frequency (how many times during the day are they
exposed to such a noise)

15. Noise Dose:
• An 8 hrTWA (TimeWeighted Average) of 90 dBA is
designated as a Noise Dose of 100%
• Equivalent Dose of 90 dBA Over an 8 HourTWA Period:
• 95 dBA over 4 HourTWA Period
• 100 dBA over 2 HourTWA Period
• 105 dBA over 1 HourTWA Period
• 110 dBA over ½ HourTWA Period

16. 6 dB Double Distance Rule:
• NoiseWill Decrease 6 dB EachTimeYou Double the
Distance (free field, point source only)

17. 6 dB RuleWould Not Apply:

18. Sources of Noise:
• Construction
• Traffic
• Railway
• Aircraft
• Industry

19. ‫الضوضاء‬ ‫قياس‬ ‫إرشادات‬ ‫البيئة‬ ‫وزارة‬:

20. Hammer Drill
Chain Saw
Chop Saw
Miter Saw
Impact Wrench
Tile Saw
Circular Saw
Hand Drill
Metal Shear
Router
Planer
Belt Sander
Table Saw
Orb. Sand.
Mortising
75 80 85 90 95 100 105 110 115
Task/Tool
Noise Levels for
Common Tools
Source: NIOSH

21. Construction Noise Levels:

22. Construction Noise:
• Source of Noise:
• Impact Noise
 Pilling
 Hand-held breaker
 Excavator mounted breaker
 Vibration hammer
• Engine Noise
 Compressors
 Generators
 Trucks

23. Why machines get noisier with use:
1.Worn or chipped gear teeth – will not mesh properly.
2.Worn bearings - bearing wear creates vibration and noise
3. Poor lubrication
4. Damaged silencers
5. Removal of a noise-reducing attachment
6. Imbalance in rotating parts

24. Health Effects:
• Noise pollution can damage physiological and
psychological health.
• High blood pressure, stress related illness, sleep disruption,
hearing loss, and productivity loss are the problems related
to noise pollution.
• It can also cause memory loss, severe depression, and panic
attacks.

25. The techniques employed for noise
control can be broadly classified as:
• Control at source
• Control in the transmission path
• Using protective equipment (Receiver)

26. Control of Construction Noise:
• Silenced equipment
• Excavator mounted breaker with sound proof hammer
bracket
• Hydraulic breaker
• Pneumatic breaker fitted with mufflers and damping collars
• Good Maintenance
• Modifying Existing Old Equipment

27. Control of Construction Noise:
• New alternative (quieter) techniques :
• Concrete crusher
• Non-explosive demolition agent
• Pile cracker
Hydraulic piling hammer
reduce 2-9 dB(A)
Hydraulic crusher for demolition
20 dB(A) lower than excavator
mounted breaker

28. Control of Construction Noise:
• Install Barriers Between the Employee and Noise
Source
• Enclose the Noise Source
Enclosure effectively reduced
noise from generator6 m barrier for pre-bored
machines reduce 3 dB(A)
Container used as noise
enclosure

29. Control of Construction Noise:
• Work Activity Scheduling (Receiver)
• Earplugs : to workers to reduce their exposure to noise.
Earplugs are the control of last resort and should only be
provided when other means of noise controls are infeasible.
As a general rule, workers should be using earplugs
whenever they are exposed to noise levels of 85 dB.

36. ‫في‬ ‫دارسة‬ ‫عمل‬ ‫تم‬2017‫لتقييم‬‫المستشفيات‬ ‫من‬ ‫عدد‬ ‫وخارج‬ ‫داخل‬ ‫الضوضاء‬ ‫مستويات‬
‫المختلفة‬‫بمحافظتى‬‫والجيزة‬ ‫القاهرة‬‫والتعرف‬‫ومدى‬ ‫لها‬ ‫الصحية‬ ‫واآلثار‬ ‫مصادرها‬ ‫على‬
‫بها‬ ‫المسموح‬ ‫الحدود‬ ‫مع‬ ‫مطابقتها‬‫قانونا‬:

43. References:
• http://www.businessdictionary.com/definition/environment.html
• https://www.conserve-energy-future.com/top-25-environmental-
concerns.php
• https://en.m.wikipedia.org/wiki/Noise_pollution
• https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&ve
d=2ahUKEwjK_tiP-
YDeAhVPa1AKHV9OAgYQFjADegQICRAC&url=https%3A%2F%2Fminingq
uiz.com%2Fpowerpoints%2FHearing_Conservation%2FHCP2001.ppt&usg=
AOvVaw1NEQmrUUeXaXA94bC9fluZ
• http://www.nonoise.org/library/envnoise/#what
• https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ve
d=2ahUKEwjuhYyHl_3dAhWFESwKHVoBCuEQFjAAegQIAxAC&url=http%3
A%2F%2Fwww.elcosh.org%2Frecord%2Fdocument%2F1666%2Fd000573.
ppt&usg=AOvVaw1Al_ZJNKlx_QBMYUpDZt8T
• http://www.eeaa.gov.eg
• OSHA Noise page