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Noise Pollution Chapter 16PowerPoint Presentation

Noise Pollution Chapter 16

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### Noise PollutionChapter 16

What’s the difference between a sound and a noise?(Intro & Section 16.3)

Pressure Waves (Section 16.1)

Source

Typical SPLs

Measurements by Gordon Hempton, “an acoustic ecologist and sound recordist”

In-Class Activity

Your company is purchasing an additional piece of manufacturing equipment. You have two choices. One brand generates 91 dB(A); another brand costs 10% more but generates 88 dB(A). You determine that the current level of noise in the production area is 88 dB(A). The workers are on 8-hour shifts. The OSHA 8-hour noise limit for the area is 93 dB(A). The company has been doing well and has thoughts of expanding production at this location in the near future. Determine which piece of equipment to purchase.

Effect of Distance

- Point source: SPL = 20 log (D/Do) 6 dB/DD
- Line source: SPL = 10 log (D/Do) 3 dB/DD
- Hard site: SPL = 10 log (D/Do) 3 dB/DD
- Soft site: SPL = 15 log (D/Do) 4.5 dB/DD

Noise Abatement and Control(Sections 16.4 and 16.5)

Who regulates noise levels?

Noise Abatement and Control

What are some options for abating or controlling traffic noise?

Some Info about Noise Barriers

- How effective are they?
- When are they considered?
- When are they installed?
- Of what are they constructed?

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