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Vibro Acoustics Three-dimensional Drum Silencers

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By Author: Kevin Richard
Total Articles: 242
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When low frequency sound travels through a duct in which a segment of hard walls is replaced by the membranes backed by side branch cavities, they are reflected as a result of sound radiation by the induced membrane vibration.
The reflection is effective over a wide frequency band when high tension is applied in the avail direction of the duct. The device is thereby known as a drum silencer, and its existing Vibro acoustics theory is based on a two-dimensional model in which the membrane behaves like a string. This study extends over the theory of three dimensions, in which the membrane covers a finite rectangular activity with all edges fixed. It is shown analytically and validated experimentally that the fixed edges of the drum silencer have no impact on the silencing performance of the device working in the cutoff frequency duct range and when there is no tension in the transverse direction. Finite element method is used to stimulate the complete fluid membrane coupling and the results are validated by known solutions. The validated numerical technique is ...
... then applied to display the acoustic advantage of using a circular activity for a rectangular duct.
O’Neill Engineered Systems is the leader in mobile temporary noise abatement solutions, offering impeccable acoustic proficiency for more than a decade.
Painstaking noise abatement is required for any large scale construction project near residential and business areas. Neighborhood complaints and also legal challenges can restrict working hours and cause interference that may cost money and prolong the time necessary to finish the project.
Cost-efficient and simple to implement construction site acoustic barriers can palliate those irritations and enable your company to maintain cost-efficient noise control without hampering progress.
Impacts of noise pollution
The presence of endured loud noises in any setting is not only irritating to those nearby people, but scientists have explored that continual exposure can result in severe health problems. These may include stress and anxiousness, heightened blood pressure and also heart disease.
Over 30% of the population is regularly exposed to noise that has a negative effect on well-being, with cardiovascular disease and stress among the associated hazards.
Considerations for reducing noise levels on the construction sites:
Durable and weatherproof: The barrier should be durable and certified waterproof enough to withstand all the climate conditions.   
Create a positive organization presence: IES 2000 products can be personalized with graphics to display your business branding and logo or even some specific community oriented messages. 
Contractors of all sizes and types should thrive to support endurable work trends, mainly to soften the impact of construction noise that is a normal by-product of intricate construction projects. Using Ketchum and Walton acoustic panels will save money and enhance the image of your organization and reputation as a positive corporate citizen while creating a much better working ambience.

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