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CUSTIC software: Noise pollution map produced by three sources (XY-plane)
CUSTIC software: Noise pollution map produced by three sources (XY-plane)
Noise pollution software: highway noise barriers, noise pollution control, industrial noise control, environmental engineering, environmental consultancy service, environment simulation, environmental modeling and environmental impact assessment.
CUSTIC: Noise pollution · CUSTIC - Software solutions - Software advantages - Price - DEMO download
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The concept of representing a fluctuating noise level in terms of a steady noise having the same energy content is widespread in recent research, as shown in the EPA report on Public Health and Welfare Criteria for Noise (1973). There is evidence that it accurately describes the onset and progress of permanent noise-induced hearing loss, A-17 and substantial evidence to show that it applies to annoyance in various circumstances. A-18 The concept is borne out by Pearsons' experiments A-19 on the trade-off of level and duration of a noisy event and by numerous investigations of the trade-off between number of events and noise level in aircraft flyovers. A-20 Indeed, the Composite Noise Rating A-21 is a formulation of Leq, modified by corrections for day vs. night operations. The concept is embodied in several recommendations of the International Standards Organization, for assessing the noise from aircraft,A-22 industrial noise as it affects residences,A-23 and hearing conservation in factories.A-24
COMPUTATION OF EQUIVALENT SOUND LEVEL
In many applications, it is useful to have analytic expressions for the equivalent sound level Leq in terms of simple parameters of the time-varying noise signal so that the integral does not have to be computed. It is often sufficiently accurate to approximate a complicated time-varying noise level with simple time patterns. For example, industrial noise can often be considered in terms of a specified noise level that is either on or off as a function of time. Similarly, individual aircraft or motor vehicle noise events can be considered to exhibit triangular time patterns that occur intermittently during a period of observation. (Assuming an aircraft flyover time pattern to be triangular in shape instead of shaped like a "normal distribution function" introduces an error of, at worst, 0.8 dB). Other noise histories can often be approximated with trapezoidal time pattern shapes.
The following sections provide explicit analytic expressions for estimating the equivalent sound level in terms of such time patterns, and graphic design charts are presented for easy application to practical problems. Most of the design charts are expressed in terms of the amount that the level (L) of the new noise source exceeds an existing background noise level, Lb. This background noise may be considered as the equivalent sound level that existed before the introduction of the new noise, provided that its fluctuation is small relative to the maximum value of the new noise level.
ENVIRONMENTAL NOISE: FW0 - FW1 - FW2 - FW3 - FW4 - FW5 - 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28 - 29 - 30 - 31 - 32 - 33 - 34 - 35 - 36 - 37 - a1 - a2 - a3 - a4 - a5 - a6 - a7 - a8 - a9 - a10 - a11 - a12 - a13 - a14 - a15 - a16 - a17 - a18 - a19 - a20 - a21 - a22 - a23 - a24 - a25 - a26 - b1 - b2 - b3 - b4 - b5 - b6 - b7 - b8 - b9 - b10 - b11 - b12 - c1 - c2 - c3 - c4 - c5 - c6 - c7 - c8 - c9 - c10 - c11 - c12 - c13 - c14 - c15 - c16 - c17 - c18 - c19 - c20 - d1 - d2 - d3 - d4 - d5 - d6 - d7 - d8 - d9 - d10 - d11 - d12 - d13 - d14 - d15 - d16 - d17 - d18 - d19 - d20 - d21 - d22 - d23 - d24 - d25 - d26 - d27 - d28 - d29 - d30 - d31 - d32 - d33 - d34 - d35 - d36 - d37 - d38 - d39 - e1 - e2 - e3 - e4 - e5 - e6 - e7 - f1 - f2 - g1 - g2 - g3 - g4 - g5 - g6 - g7 - g8 - g9 - g10 - g11 - g12 - g13 - g14 - g15
Canarina Algoritmos Numéricos, S.L.
Environmental software solutions
Software para impacto del medio ambiente
38300 LA OROTAVA, ,
Islas Canarias,
Españae-mail: contact us
European network on pollution · European Union
Member of MAPO: European network on Marine Pollution.
Project funded by the European Commission
through the 6th Framework Programme for Research and Development
highway noise barriers
CANARINA: Home - Air pollution · DISPER - Noise pollution · CUSTIC - Water pollution · DESCAR - Contact us
CUSTIC: Noise pollution · CUSTIC - Software solutions - Software advantages - Price - DEMO download
DATA: Input data I - Input data II - Input data III - Input data IV - Input data V - Import and export data - Software commands
ENVIRONMENTAL NOISE: FW0 - FW1 - FW2 - FW3 - FW4 - FW5 - 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28 - 29 - 30 - 31 - 32 - 33 - 34 - 35 - 36 - 37 - a1 - a2 - a3 - a4 - a5 - a6 - a7 - a8 - a9 - a10 - a11 - a12 - a13 - a14 - a15 - a16 - a17 - a18 - a19 - a20 - a21 - a22 - a23 - a24 - a25 - a26 - b1 - b2 - b3 - b4 - b5 - b6 - b7 - b8 - b9 - b10 - b11 - b12 - c1 - c2 - c3 - c4 - c5 - c6 - c7 - c8 - c9 - c10 - c11 - c12 - c13 - c14 - c15 - c16 - c17 - c18 - c19 - c20 - d1 - d2 - d3 - d4 - d5 - d6 - d7 - d8 - d9 - d10 - d11 - d12 - d13 - d14 - d15 - d16 - d17 - d18 - d19 - d20 - d21 - d22 - d23 - d24 - d25 - d26 - d27 - d28 - d29 - d30 - d31 - d32 - d33 - d34 - d35 - d36 - d37 - d38 - d39 - e1 - e2 - e3 - e4 - e5 - e6 - e7 - f1 - f2 - g1 - g2 - g3 - g4 - g5 - g6 - g7 - g8 - g9 - g10 - g11 - g12 - g13 - g14 - g15
ALGORITHMS: Algorithms I - Algorithms II
CUSTIC software solutions: This application has been used in great number of environmental reports, noise courses and noise studies in the last years. We currently have users in more than 10 countries. Noise reports in Spain:
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Madrid: highway noise pollution modeling - noise pollution modeling course - pollution noise from roads report - plant noise pollution modeling - the noise pollution in railways study - sound and air pollution in airports report - control noise pollution in industries study - sources of noise pollution and noise modeling course - airport noise pollution modeling - roads noise pollution modeling - railway noise pollution modeling |
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Málaga: noise model and noise mapping software course - noise reduction software applications - plant noise pollution modeling - effects of noise pollution study - sources of noise pollution report - airport noise pollution modeling - roads noise pollution modeling - railway noise pollution modeling - noise pollution modeling in the coast - highway noise pollution modeling |
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Barcelona: highway noise pollution modeling - noise pollution modeling course - plant noise pollution modeling - study of sound pollution, pollution prevention and abatement - air and noise pollution report in airports - council noise pollution study - noise pollution caused by roads report - effects of noise pollution in schools study - airport noise pollution modeling - roads noise pollution modeling - railway noise pollution modeling - noise pollution modeling in the coast |
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Mallorca: noise pollution effects - plant noise pollution modeling - elaboration of a 130db 50db and 85db decibel map in the city - low frequency and noise reduction study - how to reduce noise and noise prevention report in industries - airport noise pollution modeling - roads noise pollution modeling - railway noise pollution modeling - noise pollution modeling in the coast - highway noise pollution modeling |
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Cartagena: decibelmeter and vibration study - plant noise pollution modeling - noise cancellation report - airport noise intensity study - reducing noise and noisy roads reports - noise pollution modeling in the coast - highway noise pollution modeling |
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Cádiz: highway noise pollution modeling - plant noise pollution modeling - noise abatement and attenuation study - study of noise suppression, noise levels and noise fluctuations in railways - cause and effect of noise course - noise pollution modeling in the coast |
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Murcia: highway noise pollution modeling - noise attenuating and sources of noise course - noise level map elaboration - causes of noise in hospitals report - noise pollution modeling in the coast - plant noise pollution modeling |
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Valencia: highway noise pollution modeling - plant noise pollution modeling - noises caused by industries report - elaboration of a noise power level map - noise cancelling and eliminating in roads report - soundlevel and sound control study in airports - airport noise pollution modeling - roads noise pollution modeling - railway noise pollution modeling - noise pollution modeling in the coast |
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Galicia: plant noise pollution modeling - road sound controller study - control sound and active noise control in industries report - airport noise pollution modeling - roads noise pollution modeling - railway noise pollution modeling - noise pollution modeling in the coast - noise pollution modeling in Pontevedra - noise pollution modeling in highways |
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Asturias: highway noise pollution modeling - engineering noise control in industrial complex study - control noise and vibration in cement plant report - sound and vibration in railways study - noise cancellation and reduction in hospitals report - noise pollution modeling in the coast - plant noise pollution modeling |
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Vigo: plant noise pollution modeling - reduce noise and euronoise study - noise sources in hospitals report - how eliminate noise course - airport noise pollution modeling - roads noise pollution modeling - railway noise pollution modeling - noise pollution modeling in the coast - highway noise pollution modeling |
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Orense: highway noise pollution modeling - reducing loud noise in airports report - attenuation and suppression of traffic noise study - noise attenuators and attenuating railway noise study - plant noise pollution modeling |
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Andalucia: highway noise pollution modeling - plant noise pollution modeling - denoising, noise suppressor and how to reduce noises near hospitals report - noise cancellation and noise cancellers in roads report - noise fluctuation study in airports - noise elimination and silencing near resident areas report - noise pollution modeling in Seville - noise pollution modeling in Málaga - noise pollution modeling in Huelva - noise pollution modeling in Cádiz - noise pollution modeling in Granada - noise pollution modeling in Almería - noise pollution modeling in the coast |
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Cantabria: plant noise pollution modeling - highway noise pollution modeling - noise cancelling near highways study - quieting and eliminating noise in industries report - airport noise impact assessment - noise pollution modeling in Santander - noise pollution modeling in Laredo - noise pollution modeling in the coast |
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Vizcaya: noise suppressors near hospitals study - noise disturbance and abatement near highway report - how to reduce noise course - noise sensor study - noise pollution modeling in Bilbao - noise pollution modeling in Santurce - noise pollution modeling in Baracaldo - noise pollution modeling in the coast - highway noise pollution modeling - plant noise pollution modeling |
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Canarias: noise pollution modeling in La Orotava - noise pollution modeling in Puerto - noise pollution modeling in Santa Cruz - noise pollution modeling in Los Cristianos - noise pollution modeling in Isla Baja - airport noise pollution modeling - roads noise pollution modeling - railway noise pollution modeling - noise pollution modeling in the coast - highway noise pollution modeling - plant noise pollution modeling |
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