Noise Levels of Heavy Earth Moving Machineries  in a Chromite Mining Complex of Odisha, India: An  Assessment and Analysis

Sunamani Kerketta; Rajendra Gartia; Somanath Bagh

Volume : III, Issue : VI, June - 2013

Noise Levels of Heavy Earth Moving Machineries in a Chromite Mining Complex of Odisha, India: An Assessment and Analysis

Sunamani Kerketta, Rajendra Gartia, Somanath Bagh

Abstract :

The present study describes a systematic noise monitoring inside the working zone of the chromite mining complex for the Heavy duty, Medium duty and Light duty vehicles in summer 2008 and winter 2009. The present study aims at estimating the noise levels of different heavy earth moving machineries (HEMMs) and tests the significant difference among them. The Analysis of Variance (ANOVA) reveals that the equivalent noise level differs with respect to time of monitoring and the types of HEMMs at 1% level of significance. The Post hoc analysis of multiple comparisons of means shows that Leq level is the most influential during the 1st part of the time of monitoring for the Pay Loader (H1). In case of the dozer (M3), Leq is the most significant during the 3rd part of the time of monitoring. Similarly, Leq level of the Drilling Machine (L2) is found to be the most influential during the 1st part of the time of monitoring. The equivalent noise levels of Pay Loader (H1) and the Dozer (M3) exceed the prescribed limits during the period of monitoring.