Levels of Noise, SPM, H2S and CO decreased with increasing distance from the industrial area but the reverse was the case for Hydrocarbon. Hence, there is a need for adoption of cleaner technologies by the industries and enforcement of environmental standards by regulato...
In subject area: Engineering The Perceived Noise Level (PNL) is a frequency-weighted SPL used to determine the annoyance potential present in complex sounds environments, and it is assessed from the SPLs in the 24 one-third octave bands with midband from 50 Hz to 10 kHz. ...
Environmental Impacts of Quaid-e-Azam Industrial Estate on Neighboring Residential Area in Lahore, Pakistan Industries have contributed for human development by improving human life styles, increasing human life expectancy rate, providing more and more jobs. Stil... S Hina - 《Journal of Water Resour...
Procedure for estimation of the indoor equivalent A-level The procedure of estimation of the indoor noise caused by outdoor noise penetrating through façade is as follows. Experimental investigations An industrial area with dominant noise source caused by railway traffic was chosen for experimental me...
Heavy-duty diesel vehicles were measured for noise level, whole-body vibration from the driver's seat, and in-cab air quality while the vehicles were parked with engine idling at a rest area and while they were driven. These baseline data will help similar studies determine whether new truck...
These improved acoustic situation levels translated into a low predicted annoyance level of 41.2% and 50.2% during the lockdown period compared to the pre-lockdown periods of 86% and 87% in residential and near industrial areas, respectively (Mishra et al. 2021). It should be noted the ...
Results indicated that the highest noise pollution level of 80.15 dB(A) was observed in industrial-cum-residential area followed by 71.17 dB(A) in commercial-cum- residential area, and 70.21 dB(A) in educational area. Least noise pollution level of 45.64 dB(A) was recorded in the silence ...
Noise-level patterns are presented for surgeries contingent on important surgery characteristics: 16 different surgery types, operation method, day/night time point and operation complexity (complexity levels 1–3). This serves to cover a wide spectrum of day-to-day surgeries. The noise patterns ...
An ambient noise compensation system determines an ambient noise level of a listening area. The ambient noise level may be calculated from the differences between a desired audio signal in the listening area, a measured background noise level in the listening area, and measured acoustic characteristi...
The Leq 24 was calculated by assuming a noise level of 50 dBA between the hours of 10 pm and 6 am. Results indicated that "typical" daily noise exposures varied widely between students, ranging from a low Leq 24hr of 71 dBA for a female fifth grader to a high of 103.2 dBA for a ...