The increase in industrial activities and vehicular movement along the northern industrial area of Windhoek has vastly increased the amount of traffic noise and other noise pollution in the area. Noise pollution has an adverse health effect to human population, when exposed for a long period. ...
This regulation defines the maximum boundary noise emission limits for air conditioning and mechanical ventilation systems in *non-industrial buildings. The following table explains the maximum boundary noise limit. Type of affected premises Boundary noise limit (reckoned as the equivalent continuous noise...
European Parliament and of the Council, of June 2002, addresses issues regarding the assessment and the management of environmental noise. In its definition, this directive highlights the noise produced by means of transportation, road, rail, and air traffic, and facilities used in the industrial ...
In acoustics, an octave is a doubling of the frequency and thus a third-octave band integrates the sound over a band for which the upper limit is 21/3 times its lower limit. The mid-band frequencies in Hertz are given by the relation (1.3.3)fn=1000×2n−30/3 where n is known ...
They say such a limit would mean an end to important industrial and scientific research. Scientists do not know how many and what kinds of noises are harmful to ocean animals. However, many scientists suspect that noise is a greater danger than they previously believed. They want to prevent ...
小题3: We can know from the passage that many scientists think that the noise limit of one hundred twenty decibels would___. A.prevent them from doing their research work B.benefit them a lot in their research work C.do good to their health D.increase the industrial output 小题4:Accord...
There are many noise sources that can limit the detection capability of any detection system. These noise sources can generally be categorized as noise in the detector, noise in the amplifier, and fluctuations in the radiating background and the signal itself. The noise in the detector comes fro...
An industrial area with dominant noise source caused by railway traffic was chosen for experimental measurements. The location of noise measurements and the selected building façades are presented in Fig. 4. The noise on these façades is produced by railway traffic, as well as manoeuvres of ...
(8 days)—the third stage of lifting restrictions. Hairdressing and beauty salons were opened. Food outlets were also opened but with certain limitations. Youths up to 13 years of age could go outside without an adult. The limit of passengers in public transport has been increased (one ...
(A)industrialandcommercialarealimitbutbreachesthe45dB(A)and55dB(A)residentialarealimitoftheWorldBank.Researchlimitations/implicationsAsmuchasitwouldbedesirableambientnoiselevelcouldnotbemeasuredinallthereceptors’locationscoveredbythemodeling.However,thecapabilityofthemodelingsoftwareadoptedmakesthistohavenonegativeimpact...