نتایج جستجو برای: sound power
تعداد نتایج: 584980 فیلتر نتایج به سال:
This paper discusses noise generation mechanisms and techniques for noise reduction in fluid power units. Major noise sources in fluid power units can be identified with a sound intensity method. It has been proved that components of power units with larger sound radiating surfaces such as an electric motor and an oil reservoir produce a major part of global noise radiation.
Introduction: Noise is one of hazardous agents of workplaces in industries. Electric industries and power plants are among industries in which noise pollution should be taken into account. This study aimed to develop and verify a statistical model for acoustic wave propagation in an indoor environment for noise related risk reduction management. . Material and Method: This theoretical-experime...
This paper describes the estimation of the sound power radiated from a modified structure using an aluminum plate es asimple example. The modal parameters of the original, unmodified aluminum plate are first determined by the experimental modal analysis. Second, those of the modified aluminum plate are calculated by the Modal Synthesis Method. Using these obtained modal parameters, the three fa...
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