Chapter 25 Noise

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Chapter 25Noise

• Objectives
• Noise in daily living
• Characteristics and kinds of noise
• Source of noise pollution
• Noise characteristics to human health
• Noise pollution and prevention

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Terms

• Sound wave
• Frequency of sound
• Wavelength of sound
• Annoyance
• Medium and speed of sound
• Sound power level
• Sound intensity level
• Sound level
• Sound pressure level

• Impulsive noise
• Intermittent noise
• Steady-state noise
• Fluctuation noise
• Low voice
• Ambient noise
• Infrasonic
• Ultrasonic
• Audiosonic

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Noise in Daily Living

• Low voice
• Ambient noise

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Characteristics of Noise

• Frequency of sound
• Wavelength of sound
• Medium and speed of sound
• Sound pressure level
• Sound level
• Sound intensity level
• Sound power level

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Kinds of Noise

• Steady-state noise
• Fluctuation noise
• Intermittent noise
• Impulsive noise

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Source of Noise Pollution

• Transportation
• Noise of manufactory
• Noise of community
• Noise of construction
• Noise of residence
• Other causes of ambient noise

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Standard of Sound Level

• 8 hours lt 90 decibel
• gt 8 hours lt 80 decibel

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Noise Characteristics to Human Health

• Resistance
• Sound level
• Frequency
• Characteristic
• Time
• Long term

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The Effects of Ambient Noise to Human Health

• Hearing
• Temporary
• Permanent
• Acute
• General health and mind
• Blood system
• Sleeping
• Annoyance
• Communication
• Efficiency and occupational safety
• Other effects

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Community and Industrial Noise Pollution

• Noise pollution and prevention
• Suggestion to government policy

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Questions

• How many kinds of noise are in daily living?
• What are noise characteristics?
• What are types of noise?
• How many methods does prevent ambient noise?