Noise Reduction Technology - International Civil Aviation
Noise Reduction Technology - International Civil Aviation
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Research on Noise Reduction in Boiler Room - An Actual
According to the results of the spectrum analysis, we found the noise source and proposed noise reduction measures, namely the establishment of sound insulation room in which the drums and induced draft fan installed, and the wall of the room are appended acoustic sound--absorbing material.
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Propulsion Noise Reduction Research in the NASA Advanced
The conventional method of treatment is to use passive damping techniques or to redesign the fan. Redesign is often costly and ineffective. In the last decade, resonators and active noise control technique have emerged as a viable technology to reduce the noise levels of centrifugal fans.
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(PDF) NOISE REDUCTION OF CENTRIFUGAL FAN BY USE OF
Noise Reduction Technology - International Civil Aviation
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Boiler Making Noise? Here's What To Do - Soundproof Central
To date, noise reduction has focused mainly on reducing engine noise. Microinjection system, impacting the main jet, has shown the ability to suppress jet noise through velocity profile modifications.
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Research on Noise Reduction in Boiler Room - An Actual
As to the noise pollution of the Hebei University of Engineering north boiler room, we have conducted a series of actual research, monitoring, and analysis of the spectrum of various monitoring sites.
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Boiler Fan Fault Problems And Cures
A key technology for reducing fan noise is acoustic wall treatment, and liners in the inlet and bypass duct provide essential attenuation. Work continues to improve liner performance, but the task of maintaining current levels of liner attenuation will be challenging, given the incentives to make the intake and bypass duct shorter in relation to diameter, and to reduce nacelle length for fuel burn reasons.
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5 Technology | Technology for a Quieter America | The
There are various factors that affect the noise produced by the fan, but our team is currently researching the reduction of the noise from the interaction of the rotor and stator (hereafter, called interaction noise). As shown in figure 2, interaction noise occurs when the …
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