Kajian in memberi tumpuan kepada pengukuran bunyi lalu lintas di Nibong Tebal, Pulau Pinang(kawasan berkepadatan sederhana) and Klang Valley (kawasan berkepadatan tinggi). Objektif kajian ini adalah untuk menentukan bunyi lalu lintas di kawasan berkepadatan sederhana dan kawasan berkepadatan tinggi dan menentukan komposisi lalu di kawasan kajian. Meter pengukur bunyi kelas pertama digunakan untuk merakam paras bunyi selama 15 minit untuk setiap kawasan kajian dan pengukuran bunyi dilakukan pada waktu 0800 – 0900 (pagi), 1400-1500 (petang) and 2200 – 2300 (malam). Paras bunyi ( LAeq) yang melebihi 10% daripada pengukuran bunyi (L10), paras bunyi yang melebihi 90% daripada pengukuran bunyi (L90) dan maksimum paras bunyi yang diukur di kawasan kajian. Pengiraan secara manual kepadatan trafik juga diukur serentak dengan pengukuran bunyi dah halaju kenderaan. Komposisi trafik dalam kajian ini terbahagi kepada empat jenis iaitu kereta, motosikal, lori kecil dan kenderaan berat berdasarkan kepada Arahan Teknik Jalan (8/86). Paras bunyi LAeq kajian direkodkan adalah dalam julat 62 dB(A) hingga 74.25 dB(A) untuk hari bekerja dan 61.2 dB(A) hingga 75.59 dB(A) untuk hari minggu untuk kedua-dua kawasan kajian. Kesemua data bunyi LAeq yang direkodkan melebihi nilai maksimum yang dibenarkan mengikut Garis Panduan Penggunaan Tanah untuk Perancangan dan Pembangunan Baru Bagi Had dan Kawalan Bunyi Alam Sekitar oleh Jabatan Alam Sekitar Malaysia.
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This study focuses on the monitoring of road traffic noise between Nibong Tebal, Penang (Medium density) and Klang Valley (High density) study areas. The objectives of this study were to investigate the level of traffic noise at medium and high density studied site and to characterize the traffic composition on the road nearby study areas. A precision Sound Level Meter (SLM) Class One used in the measurements. The measurements were taken for 15 minutes (the sound level meter recorded every one-minute noise level) in the residential area and from 0800 – 0900 (morning), 1400-1500 (evening) and 2200 – 2300 (night). Equivalent Continuous Sound Level (Leq ), Sound Level exceeded 10% of the measurement period (L10), Sound level exceeded 90% of the measurement (L90) and maximum noise level (Lmax) were measured to assist in assessing the existing noise level at the selected sites. Manual Traffic Count was measured simultaneously with noise level and speed of vehicle. Traffic composition data in this study is categorized into four types, which Car and Van, Motorcycle, Medium Lorries and Heavy Vehicles according to the Arahan Teknik Jalan (8/86), A Guide on Geometric Design of Roads. Heavy Lorries involves a vehicle with more than 2 axles such as Lorry and Buses. Result showed that the monitored noise levels in term of LAeq in residential area ranged between 62 dB(A) to 74.25 dB(A) for weekday and 61.2 dB(A) to 75.59 dB(A) for weekend for both study sites. These levels highly exceeded the Maximum Permissible Sound Level by Receiving Land Use for Planning and New Development.
Comparison of road traffic noise at residential areas in nibong tebal, penang and klang valley / Nur Atiqah Mohamad Nor