Outdoor noise levels at Yildiz Technical University Istanbul, Turkey

Abstract

In this study, noise measurements for relevant 22 outdoor points and some indoor ambience for sensitive places such as kindergarten, classrooms, library and exhibition centre at the central campus area of Yildiz Technical University were made.A map developed evaluated hourly noise values obtained for 5 months.By using the map, noise control measures that have to be taken for subject area were determined.M easurem ents were perform ed in accordance with the Turkish Standards, by using HD 9019 Sound Level Meter.The map consisting from isoline curves of noise levels (Leq dBA) was developed by the Spherical K rigging method.The study showed that Barbaras Boulevard side of the area (front side of the University) generally has 78 dBA originated from traffic noise completely.Unfortunately, in front of the University there was much heavier traffic jam due to stops, crossroads and an overpass for vehicles.Therefore, higher noise isolines were obtained at the front of the University.This level noise is not adequate for an education purpose area.76 per cent o f the all campus area had higher noise levels than 55 dBA standard. SOMMAIREDans cette tude, les m esures de bruit pour les 22 points extrieurs appropris et un certain ambience d'in trieur pour les endroits sensibles tels que le jardin d'enfants, les salles de classe, la bibliothque et le cen tre d 'exposition la zone centrale de campus de l 'universit technique de Yildiz ont t faits.Une carte dveloppe a valu des valeurs horaires de bruit obtenues pendant 5 mois.En utilisant la carte, des mesures de lutte contre le brait qui doit tre prise pour le domaine ont t dtermines.Des mesures ont t ex cutes selon les normes turques, en utilisant le m tre de niveau sonore de HD 9019.La carte consistant des courbes d 'isoline des niveaux de bruit (Leq dBA) a t dveloppe par la m thode sphrique de Krigging.L'tude a prouv que le ct de boulevard de.Barbaras de la zone (partie antrieure de l 'universit) a gnralem ent 78 dBA provenus du brait du trafic compltement.M alheureusement, devant l 'universit il y avait bourrage de circulation beaucoup plus dense d aux arrts, au carrefour et un passage suprieur pour des vhicules.Par consquent, de plus hauts isolines de bruit ont t obtenus l 'avant de l'universit.Ce b rait de niveau n 'est pas adquat pour une zone de but d'ducation.76 pour cent de la toute la zone de cam pus ont eu des niveaux plus levs de bruit que la norme de 55 dBA.