Effect of noise on hearing levels of secondary school students

Abstract

Heise is the most OOJJllJ1QC pollutant in man' a general and working enviror.mer.t. However, many are not aware of the hazards of thin universal pollutant. Heise con cause irrepara1:iLo damage to tho CQ%' whon it is exposed to r..oise. The intcmsity .t noise ie. tho 110100pressure level orA tho time of expoeuro only determine whether the particular noise to which the ear is exposed could make a person deaf. Deafness due to noise 'exp.eure cannot be remedied. A largo number of research workers haw reperted on the 1mpaot . of noise en faotOlY workers. (Singletcm.,1938;Satalort,l957;OIS Information 8heot 17,1966; Bums orA Robinsen,1970J P.Sutten,l971; 1U) Report, 1977). These workers have revealed ~t the taot~ worker who is exposed to oight houro flit noise in a factory or.d working five days a ~ booame deaf ultimately. BO'M)ver, rA works h.o.oveboon repoJrted en hearing levels of school ohildrer. who have been exposed to noise for ~ days per week. Waridr.g witb school children eepeoio.lly those who arc exposed to rather high OGD1lJl.U'.ity noise in tho towns in fI\Yoaroor, I felt the r.ced to study the effect of rAise en their hco.ri.r.g levels. The survey was carried out 11. the envirer.DlO11tof' three oeoGl".dnr:ysoheGls in order to investigate bIIJwthe I1id.se in the roGpeoti ve el1vir(mment has affected the hearing levol. of' students in tho age groups 3.6 - 18. A oanparati ve study of tho hooring level of' studento of' those oohools which hod noisy (m'Virolwents with those Gt cpietcr enviror.monts was made. Besides tho hearir..g lovel of those children who haw been in tho same school for 10.. years or mere WOIJcompared with thoDe who'Werein the some school for ...".. leas than 5 years.