noise pollution Flashcards
what is a noise?
unwanted sounds at wrong time and place
what is noise pollution?
unwanted sound which leads to stress and further health hazards
what are the sources of noise?
1- automobile 2- industries 3-trains 4-home appliances 5-traffic noise
what is the property of noise?
noise is sound which has 2 properties
1- loudness
2- frequency
the greater the amplitude, the greater the?
the greater the amplitude, the greater the loudness of the sound
the greater the frequency, the greater the?
the greater the frequency, the greater the pitch of the sound
what is the maximum daily exposure of sound?
up to 85 decibles
what is the range of frequency in which humans can hear?
20 to 20k hertz
what are the branches of noise exposure?
1- auditory
2- non-auditory
define auditory and non-auditory
auditory: noise-induced hearing loss
non-auditory: does not cause hearing loss
what are the auditory effects of noise exposure?
1- auditory fatigue
2- deafness
at what decibels does auditory fatigue occur at?
90 decibels
at what decibels does deafness occur at?
100 decibels
what occurs at a decibel greater than 160?
the tympanic membrane[ ear drum] ruptures
why does deafness occur at 100 decibels?
1- the hair cells in the ear change
2- the organ of corti is destroyed
what is the organ of corti
an organ of the inner ear
what are 4 non-auditory effects of noise exposure
1- annoyance
2- loss of efficiency
3- economic loss
4-interference
describe the 4 non-auditory effects of noise exposure
1- annoyance- the loud sound is annoying
2- efficiency- distractions due to sound
3- economic loss- productivity decreases
4-interference- cant hear other people in convos
what are the 5 physiological changes due to noise
1- Increase in heart rate
2- Increase in breathing
3- Increase in blood pressure
4- Increase in sweating
5- Increase in intracranial pressure:
what is intracranial pressure?
the pressure exerted by fluids inside the skull and on the brain tissues
how can noise pollution be controlled?
1-Better planning’s of city mind map: where to place railways, factories, etc.
2-Control of vehicles
3-Education
4-Legislation
5-Soundproof walls
6-Detachment of building: houses not stuck together
