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What is the key difference between sound and noise?
Sound is a form of energy that is perceived, while noise is unwanted sound that causes discomfort.
Noise is always an undesirable form of sound. (T/F)
TRUE
Sound becomes noise when it interferes with daily activities or causes discomfort. (T/F)
TRUE
What type of hazard is noise commonly classified as?
Occupational and environmental hazard.
Sound and noise are physically different. (T/F)
FALSE
What are the three interrelated elements of noise transmission?
Source, receiver, and transmission path.
The atmosphere is not a factor in noise transmission. (T/F)
FALSE
List three methods for controlling noise transmission.
Source control, transmission path intervention, control at receiver's end.
What is the path between the noise source and the receiver called?
Transmission path.
The transmission path does not affect the level of noise experienced by the receiver. (T/F)
FALSE
What are the two main classifications of noise?
Occupational noise and environmental/community noise.
Environmental noise is also known as occupational noise. (T/F)
FALSE
Noise is only present in industrial settings. (T/F)
FALSE
Give an example of environmental noise.
Traffic noise, loud music, construction noise.
Noise classification is important for assessing its impact on human well-being. (T/F)
TRUE
List at least four common sources of noise pollution.
Machines, transportation, appliances, ventilation systems.
Name two household appliances that contribute to noise pollution.
Vacuum cleaner, blender.
Identify three types of transportation that generate noise pollution.
Airplanes, trains, motorcycles.
Give two examples of noise pollution sources from construction.
Jackhammers, bulldozers.
List three sources of industrial noise pollution.
Factory machinery, power plants, heavy equipment.
What instrument is used to measure sound levels?
Sound level meter.
Sound is measured in decibels (dB). (T/F)
TRUE
The higher the decibel level, the quieter the sound. (T/F)
FALSE
What part of a sound level meter detects sound waves?
Microphone diaphragm.
A sound level of 70 dB is considered harmful to human hearing. (T/F)
FALSE
At what decibel level does sound become harmful?
85 dB and above.
Prolonged exposure to sounds above 85 dB can cause hearing impairment. (T/F)
TRUE
Name one common source of noise above 85 dB.
Heavy traffic, rock concerts, chainsaws.
The Occupational Safety and Health Administration (OSHA) considers 8-hour exposure to 85 dB safe. (T/F)
FALSE
A whisper typically measures around 90 dB. (T/F)
FALSE
What is the term for excessive or harmful noise in the environment?
Noise pollution.
Noise pollution only affects humans. (T/F)
FALSE
Noise pollution has no long-term health effects. (T/F)
FALSE
What is one common consequence of prolonged noise exposure?
Hearing loss.
Noise pollution is mainly an indoor problem. (T/F)
FALSE
What type of hearing loss is caused by prolonged exposure to loud noise?
Noise-induced hearing loss (NIHL).
Noise-induced hearing loss is reversible. (T/F)
FALSE
Name one non-auditory effect of noise pollution.
Hypertension, stress, cognitive impairment.
Noise exposure can contribute to cardiovascular diseases. (T/F)
TRUE
What type of noise effect includes stress and cognitive impairment?
Non-auditory effects.
What test is commonly used to measure hearing loss?
Audiometry.
Audiometry measures the hearing threshold in decibels. (T/F)
TRUE
A change of 10 decibels or more indicates hearing impairment. (T/F)
TRUE
What type of equipment is used during an audiometry test?
Earphones attached to an audiometer.
Hearing loss due to noise exposure is always temporary. (T/F)
FALSE
What is the most effective control measure for noise pollution?
Elimination.
PPE is the least effective way to control noise pollution. (T/F)
TRUE
What are the three levels of noise pollution control?
Source control, transmission path intervention, control at receiver's end.
Administrative control includes changing work schedules to reduce noise exposure. (T/F)
TRUE
What type of control involves sound barriers or zoning?
Transmission path intervention.
What Presidential Decree focuses on sanitation and noise control?
Presidential Decree No. 856, S. 1975.
What law established noise standards in the Philippines?
Presidential Decree No. 1152, S. 1977.
What bill aims to regulate noise pollution through the Noise Pollution Control Board?
Senate Bill No. 447.
Which act includes noise regulations as part of air quality standards?
Republic Act No. 8749 (Clean Air Act).
What local government code addresses community noise management?
Republic Act No. 7160 (Local Government Code).
