Untitled

Abstract

The noise status of growing urban centres of the country are very much required to develop acoustic design and planning guidelines for various land use classification. An attempt in this direction has been made by measuring noise equivalent levels for cities like Delhi, Jamshedpur, Dehradun and Nagpur. The choice of Ldn (Day-Night noise level) which is a better descriptor of noise quality provides an interesting status of noise in these urban centres. It has been observed that maximum percentage of areas in Delhi and Jamshedpur fall under moderately severe to very severe noisy conditions as compared to Dehradun and Nagpur on the noise rating scale. Ways and means are also considered for mitigation of noise.

Evaluation of Noise Pollution in Urban Parks

“…Since the seventies, "noise" has been largely considered as a major problem of annoyance in cities. Many field surveys have been conducted to evaluate the outdoor noise environment in several countries (Canelli, 1974;Langdon, 1976;Sadan et al, 1986;Brown and Lam, 1987;Brown, 1994;Recuero et al, 1987;Ramalingeswara and Seshagiri, 1992;Chakrabarty et al, 1997;Arana and Garcia, 1998;Abdel-Raziq et al, 2000;Pandya, 2001;Zannin et al, 2001Zannin et al, , 2003Morillas et al, 2002;Korfali and Massoud, 2003;Zannin, 2004, 2005;Brambilla, 2004).…”

Measuring, Mapping, and Evaluating Daytime Traffic Noise Levels at Urban Road Intersections in Doha, Qatar

“…Similarly, based on the expected community reaction to noise exposure and its consequent harmful health effects, noise rating scales [16] and risk zone criteria [17] have been developed to measure and compare community noise levels (see Table 1). Rating scales or risk zone criteria help assess area-specific noise exposure and identify noise hotspots.…”

“…In the case of mixed land use, when at least 50% of the use of that area falls within one of the specified land uses in Table 2, it is considered to belong to that category [20]. However, in some cases, the category of mixed land use is declared by an appropriate authority [16,17]. In Qatar, the silence zone is combined with the residential area, and the daytime noise limit is 55 dB(A).…”

“…For instance, Pandya studied urban noise in four typical cities in India namely Delhi, Jamshedpur, Dehradun, and Nagpur [16]. They measured L eq .…”

“…Similarly, in a noise study done in the capital Dhaka in Bangladesh, noise level and traffic flow data for a period of 1-month on both working and non-working days were collected at five major and busy signalized intersections [29]. Similar to Pandya (2001), they calibrated the Sound Level Meter (set at A-weighting scale and fast response mode at 1 s intervals) with a 94 dB Sound Level Calibrator before and after taking each noise level datum. The resulting L eq .…”