NOISE

Question 1

EFFECTS OF NOISE

Answer 1

1. auditory effects
   -100 db continues exposures can lead to permanent hearing loss
   - >160 db rupture tympanic membrane
2. non auditory
   -Interference with speech
   -annoyance which is primarily a psychological response
   - efficiency reduction of noise has been found to increase work output
   -phsyiological changes: BP, sweating, RR , Intracranial pressure , visual distrubances

Question 2

what to do about noise in urban areas

Answer 2

1. careful planning of cities
   -divide the city into zones,
   -separate residential areas from the main streets by using wide green belts,
   - house fronts should be no less than 15 m from the main streets
   - widen the main streets to reduce the level of penetration
2. control of vehicles
   - heavy vehicles should not be driven on narrow streets
   - stop using the horn unnecessarily
3. improve acoustic insulation of buildings e.g doublce glazed windows

4.insudstries and railwaus
5. education- no noise abatement programme can succeed without education the people