Volume No. 12 Issue No.: 4 Page No.: 410-419 April-June 2018




Saraswat Punit and Chouhan G. S.

1. Department of Zoology & Environmental Sciences Lachoo Memorial College of Sci & Tech (Autonomous), Jodhpur, (INDIA) 2. Lachoo Memorial College of Sci & Tech (Autonomous), Jodhpur, (INDIA)


Received on : September 29, 2017




Jodhpur, also called “Sun City”, is the second largest city of Rajasthan, India growing with a fast speed commercially, industrially, and residentially. The exponential growth due to teeming population, increased vehicular traffic, and mushrooming industries has led to many problems including increase in noise levels, which was nonexistent a decade ago. Keeping in view of this fact the present study was undertaken. The noise levels Leq dB (A) were monitored at three sites namely Lachoo memorial college of Science and Technology site, Shastri circle site, and Basni Phase I site – grouped as residential, commercial and Industrial area respectively. The monthly observations were recorded during morning hours ( 8-10AM) , noon hours ( 12-2PM), and evening hour (5-7 PM ) using sound level meter (Envirotech instruments) model SLM 100, taking the readings at an interval of 1min, from September 2017 to November 2017. L10, L90 and noise climate (NC) were also calculated to assess the gravity of noise environment. The maximum noise level recorded at Lachoo memorial college of Science and Technology site was 81.4dB in November 2017 (5-7 PM), at Shastri circle site was 86.7dB in September 2017(5-7 PM ), and was recorded 94.2dB in September 2017 ( 12-2.PM) at Basni Phase I site. The average noise level were found to be more than prescribed limits set by Central Pollution control Board (CPCB 2000) at Lachoo Memorial College of Science and Technology and Shastri circle sites, for all the three months and all the three recording hours ( 8-10AM ,12-2PM, and 5-7 PM ). At Basni Phase I site only it was observed to be below the prescribed limits set by CPCB in September 2017 (5-7 PM), October 2017 (8-10AM), (12-2.PM), and in November 2017 (8-10AM).


Keywords : Noise levels, Sound level meter, Central Pollution Control Board (CPCB), L10, L90, Noise Climate (NC)