noise emissions Articles

This paper discusses some recent developments that make the existing standards on the emission of high-frequency noise in power systems need to be reconsidered. It is shown that it is possible for an equipment to remain below the emission limits while at the same time the disturbance level increases beyond what was intended by the standard document. Further, the change from analog to digital ...

Jan. 3, 2006

By Inderscience Publishers

Dynamic mapping helps Madrid improve the quality of life for her citizens and visitors alike. With its 3 000 000 inhabitants and 2500 km of streets, Madrid is an excellent example of what can be done to improve human comfort related to urban noise. Since the late 60s, Madrid City Council has been working on noise problems. During this period, global environmental analysis has focused on how ...

Feb. 13, 2006

By Brüel & Kjær Sound & Vibration Measurement A/S

The increasing awareness of the public of environmental issues such as CO2 emissions, carbon footprints and waste recycling has brought the issue of environmental noise to the fore. Many of the demands of modern society result in the creation of noise sources such as larger airports, additional power stations and higher road traffic levels. In addition to this, the expansion of towns and cities, ...

Jun. 1, 2008

By Cirrus Research plc

Over the last decade, Indonesia’s largest and most successful state-owned oil and gas enterprises faced significant problems with excess light, heat, noise and environmental pollutions. The facility, located in Mudi, Tuban, has grown to produce huge amounts of toxic and sour gas, making emissions a growing concern. The traditional, large pipe flares historically used to mediate the ...

Jul. 11, 2013

By ABUTEC LLC

Nowadays, one of the most valuable criteria of vehicle quality assessment is based on acoustic emission levels. A vehicle is judged comfortable depending on the noise levels transmitted inside. Consequently, there is a general attention to the design criteria aimed at improving the structural acoustic behaviour, to comply with the increasingly restrictive ergonomic standard. Therefore, it is ...

Jan. 22, 2013

By Inderscience Publishers

Turbochargers are now commonly used in passenger cars especially in application with diesel engines because of their numerous advantages. The use of this machine greatly improves engine performance, while at the same time allowing pollutant emissions to be reduced. However, one of the important issues to take into account when a turbocharger is used in passenger cars is the whistling noise due to ...

Dec. 29, 2005

By Inderscience Publishers

Summary: Increasing requirements of the environmental standards and planning permission conditions create more challenges to the equipment providers. Environment Agency guidance demands low emission levels and local planners put low noise levels in their conditions for landfill sites. Achieving both at the same time with conventional equipment was found problematic. Biogas Technology has ...

Jun. 30, 2014

By Biogas Technology Limited

The Company Aircraft engine manufacturer, NPO Saturn, was established on July 5, 2001 through the merger of Rybinsk Motors JSC and A. Lyulka-Saturn, a leading Russian aircraft engine design bureau. The company, founded by Pavel Aleksandrovich Soloviev, has its headquarters in the town of Rybinsk and holds a 50% stake in the PowerJet joint venture with Snecma. NPO Saturn is the leading Russian ...

Dec. 10, 2010

By Brüel & Kjær Sound & Vibration Measurement A/S

Disposing of nearly 1 million pounds of medical waste a month is no easy task. The wet electrostatic precipitator, installed at Rochester, MN-based Mayo Clinic, seems to be just what the doctor ordered. While the medical waste incinerator at Mayo Clinic in Rochester, MN, consistently met state and federal emission requirements, facility leadership recognized that installing a wet electrostatic ...

Oct. 1, 2012

By Bionomic Industries Inc.

8. Mathematical algorithms   The mathematical model that the software uses provides options to model noise emissions from a wide range of sources that might be present at industrial areas and urban areas.   The basis of the model is the linear sound propagation  equation, which is used to model simple point source emissions from vehicles, industries, aircrafts,… ...

Nov. 19, 2011

By Canarina Environmental Software

Untitled Document Executive Summary Railway noise can be reduced considerably in the ...

Dec. 1, 2003

By European Commission, Environment DG

Abstract Silence is the main noise management system for the Dutch highways and is used by the Dutch Ministry of Transport. The Silence system comprises IT infrastructure, environmental data, noise management software, an organisation, procedures and maintenance. Typical noise management system tasks involve data management, setup noise management software, software customisation, ...

May 14, 2015

By Softnoise GmbH

With reactive silencers, AERZEN reduces the noise emissions on the discharge side of its screw compressors, positive displacement blowers, and rotary lobe compressors. The innovative concept of these reactive silencers is superior to classic dissipative silencers in many respects. The sound waves developing on the discharge side of a Delta Screw compressor made by AERZEN can reach 170 to 190 dB. ...

Apr. 21, 2017

By Aerzener Maschinenfabrik GmbH

Good Neighbours Limit their Noise Impact Long-term noise monitoring has taken place in various applications for many years. Business such as airports, power stations, refineries, mines, etc., may be required to perform continuous noise monitoring to ensure legal operating conditions are not breached, and to demonstrate to local authorities and communities that the business continues to be a good ...

Apr. 23, 2010

By Brüel & Kjær Sound & Vibration Measurement A/S

The next generations of direct injection diesel engines have greatly improved their performances compared with petrol engines. However, one of the pending subjects is the noise and vibration levels, due to working cycle itself. The design effort to reduce the emissions of noise and vibration transmitted to the vehicle's driver could be lessened because of the assembly process variation. In this ...

Aug. 3, 2005

By Inderscience Publishers

Casella‘s BOUNDARY Guardian is helping to ensure noise compliance and control of air quality at BSkyB’s campus redevelopment site, bringing peace of mind to site operators, the client and the local community. The BOUNDARY Guardian is a system for web-based remote monitoring of noise and/or dust emissions that ensures compliance ...

Jan. 12, 2016

By Casella

EPA is a Cabinet level executive agency responsible for protecting and conserving the environment in the Republic of China including air quality, noise control, monitoring and inspection of the environment, solid waste, recycling, sustainable development and international cooperation. It is led by the Minister for Environment, Stephen Shu-hung Shen. The Environmental Protection Agency has evolved ...

Dec. 9, 2010

By Brüel & Kjær Sound & Vibration Measurement A/S

This paper presents simulation and experimental discussions on conducted electromagnetic interference (EMI) emissions for a single-phase full-bridge sinusoidal pulse width modulated (SPWM) and hybrid pulse width modulated (HPWM) inverters. The influences of input dc link voltage, modulation depth and carrier frequency on the conducted noise are studied through ICAP simulation software. HPWM ...

Jul. 19, 2010

By Inderscience Publishers

This paper describes a green design strategies applied on a residential building "House E3" – an eco-compatible and energy efficient building near Turin airport. High noise level, elevated humidity and severe summer climate of the site were key considerations when creating the envelope with emphasis on inside comfort. Correct use of materials based on a previous research work, integrated design ...

Jul. 14, 2008

By Inderscience Publishers

A hand-held, battery-powered Fourier transform infrared spectroradiometer weighing 12.5 kg has been developed for the field measurement of spectral radiance from the Earth’s surface and atmosphere in the 3–5-µm and 8–14-µm atmospheric windows, with a 6-cm21 spectral resolution. Other versions of this instrument measure spectral radiance between 0.4 and 20 ...

Apr. 1, 1996

By D&P Instruments, Inc