Noise control

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SUSTAINABLE PRINCIPLES APPLIED TO NOISE CONTROL MANAGEMENT: A METHODOLOGICAL APPROACH

SUSTAINABLE PRINCIPLES APPLIED TO NOISE CONTROL MANAGEMENT: A METHODOLOGICAL APPROACH

... to noise control policies? Along the last decades, technologies have improved information requirements for inputs and outputs of environmental impacts, that includes noise, since is considered as ...

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ACTIVE NOISE CONTROL IN A TRANSMISSION SURFACE

ACTIVE NOISE CONTROL IN A TRANSMISSION SURFACE

... A procedure to avoid that sound pressure level increases inside the room, consists of placing a secondary source next to the error microphone, so that the cancellation point is within the direct field of the secondary ...

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Analysis and implementation of active noise control strategies using Piezo and EAP actuators

Analysis and implementation of active noise control strategies using Piezo and EAP actuators

... In many offices and buildings an adequate ventilation system is needed, in order to get a pleasant environment for people who are working or living inside. Nevertheless, the disadvantage of ventilation systems using is ...

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ACTIVE NOISE CONTROL APPLIED TO BUILDINGS COMPONENTS

ACTIVE NOISE CONTROL APPLIED TO BUILDINGS COMPONENTS

... active noise control system, based on a FXLMS algorithm. Several control parameters such as number of inputs and outputs, filter taps, factor of convergence and leakage, can be ...when noise ...

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ARTIFICIAL NEURAL NETWORK ALGORITHMS FOR ACTIVE NOISE CONTROL APPLICATIONS

ARTIFICIAL NEURAL NETWORK ALGORITHMS FOR ACTIVE NOISE CONTROL APPLICATIONS

... This paper shows the use of several methods commonly applied to training Artificial Neural Networks (ANN) in Active Noise Control (ANC) systems. Although ANN are usually focused on off-line training, ...

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ENVIRONMENTAL NOISE CONTROL IN THE PULP AND PAPER INDUSTRY

ENVIRONMENTAL NOISE CONTROL IN THE PULP AND PAPER INDUSTRY

... external noise sources of a paper making line is typically around 80 ...The noise control targets will dictate the scope and costs of sound ...the noise control design starts at the ...

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Assessing digital micromirror devices for speckle noise control in digital holography

Assessing digital micromirror devices for speckle noise control in digital holography

... Fig. 3 shows the experimental results in the holographic reconstructions when applying the proposed methodology. The images in this figure are arranged by number of superposed images (ūĚĎĀ) and GS used to generate the ...

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THE ULTIMATE GOAL OF NOISE CONTROL AT SOURCE

THE ULTIMATE GOAL OF NOISE CONTROL AT SOURCE

... observation can be made that the noise limits for the same cases seem have m uch in comm on. Exact comparisons however are difficult due to differences in the noise indicator used and in the way the limit ...

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NOISE MAPPING AND NOISE ACTION PLANS IN LARGE URBAN AREAS

NOISE MAPPING AND NOISE ACTION PLANS IN LARGE URBAN AREAS

... low noise pavements (porous or porous-elastic) type, reductions, limitations or restrictions on traffic (types of vehicles, speed, hours of access, for ...of noise control devices, such as acoustical ...

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Noise Mapping and Noise Quota Application to an Industrial Park

Noise Mapping and Noise Quota Application to an Industrial Park

... Typical noise assessment of industrial sites are made by means of short term noise measurements, at a limited number of points within a certain area around the ...reduce noise, as it does not enable ...

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HOW ACOUSTIC EXPERTS TALK TO ‚ÄúNORMAL PEOPLE‚ÄĚ

HOW ACOUSTIC EXPERTS TALK TO ‚ÄúNORMAL PEOPLE‚ÄĚ

... In noise control research we can apply powerful analysis tools of signal theory and ...of noise situations. These noise situations can be studied further in listening tests in the laboratory ...

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Estudos em Ru√≠do Aeroportu√°rio do Grupo de Ac√ļstica Ambiental da Universidade Federal do Rio de Janeiro

Estudos em Ru√≠do Aeroportu√°rio do Grupo de Ac√ļstica Ambiental da Universidade Federal do Rio de Janeiro

... airport noise control have been developped by the Environmental Acoustics Group of the Federal University of Rio de ...of noise footprints using the softwares INM (Integrated Noise Model), HNM ...

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THE ROLE OF INTERAURAL TIME AND LEVEL DIFFERENCES WHEN LOCALIZING NOISE IN NOISE

THE ROLE OF INTERAURAL TIME AND LEVEL DIFFERENCES WHEN LOCALIZING NOISE IN NOISE

... The reliability of ITD and ILD cues of a broadband-noise target within a broadband-noise masker was investigated utilizing two localization algorithms: (i) an interaural cross-correlation algorithm (ICC), ...

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Tourist Influence on Nightlife Noise

Tourist Influence on Nightlife Noise

... Between 2001 and 2002 an acoustic research on the island of Menorca was done. The island of Menorca is characterized as a family destination, where tourist attractions are the tranquility, beaches, nature and ...

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Environmental Noise Directive in Germany

Environmental Noise Directive in Germany

... Municipality populations range from 0 to 3.4 million inhabitants for each municipality that has reported noise action planning. The median is around 6,700, while the arithmetic mean is around 23,400 inhabitants. ...

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ULTRASONIC NOISE FROM ULTRASONIC DRILLS

ULTRASONIC NOISE FROM ULTRASONIC DRILLS

... ultrasonic noise is defined as the broadband noise containing high audible and low ultrasonic frequencies include the 1/3 octave band with the central frequency from 10 kHz to 40 ...for noise ...

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CAVITATION NOISE MODELING AND ANALYZING

CAVITATION NOISE MODELING AND ANALYZING

... Cavitation noise represents a useful source of information on physical processes accompanying bubble oscillations in ...cavitation noise and an appropriate method for signal analysis are ...Cavitation ...

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Noise Effects in Kerr Frequency Combs

Noise Effects in Kerr Frequency Combs

... The cases discussed, plus the not yet detailed long wavelength fluctuations schemes, show that not always is feasible a close form of the algorithm. Rather different approaches can numerically being held to achieve the ...

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Desarrollo y aplicaciones de radares de alta resolución en bandas milimétricas

Desarrollo y aplicaciones de radares de alta resolución en bandas milimétricas

... Currently, SiGe HBT and complementary metal-oxide-semiconductor (CMOS) are the emerging technologies, mainly reported in the design of low-noise amplifiers [Sam11]. In particular, THz CMOS is a promising ...

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MODELLING AIRCRAFT NOISE INSIDE DWELLINGS

MODELLING AIRCRAFT NOISE INSIDE DWELLINGS

... The good agreement between simulation and measurements in the case of single glazing shows the potential of the GRIM approach when applied to airport noise, in particular to estimate directivity effects on sound ...

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