Positional Acoustic Analysis of Noise Attenuation in Louver Window Configurations
摘要
With the onset of global climate change, conventional air circulation systems are gradually being replaced by louver designs. Apart from their primary function of regulating airflow and sunlight into a closed space, louvers also help in noise attenuation. The current study is a numeric acoustic analysis of sound attenuation over louver window designs with regard to variation in positions of the sound source and microphone. The horizontal and vertical positions of the microphone and the source are varied with respect to the louver panel, with the sound transmitted being measured at each configuration. The results obtained from the various frequency plots and pressure plots show that the sound perceived by varying the vertical positions of the microphone and source depends on their relative position with respect to the angular orientation of the louvers. A gradual decrease in sound pressure levels is seen as the horizontal distance of the microphone and source increases from the louver panel. This occurs because the intensity of the pressure waves decreases with an increase in distance between the source and the point of perception. A digression in trend is seen for angular orientation of 90° when the distance between source and louver panel is increased from 1 to 2 m. This occurs due to the change in the pattern of sound transmission across the louver setup.