Calculation of sound pressure level of marine propeller in low frequency
نویسندگان
چکیده
منابع مشابه
Calculation of the drop in sound pressure level and frequency analysis of aerospace engine test cell (Research Article)
Aerospace engines testing is a source of noise pollution and determining the low frequency acoustic characteristics of the test cell, plays an important role in optimally control of the sound field and reducing the level of sound pressure and pollution. In this study, the drop in average sound pressure level is numerically predicted by constructing a test cell according to ISO 140 standard. To ...
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15 صفحه اولLow-Frequency Loudspeaker Assessment by Nearfield Sound-Pressure Measurement*
GLOSSARY OF SYMBOLS r distance from pressure sample point to center of piston a radius of circular radiator R_ dc resistance of driver voice coil ao radius of diaphragm, = _/SD/_r E surface area ay radius of circular vent, = 5/Sv/_r SD effective projected surface area of driver diaphragm c velocity of sound in air, = 343 m/s Sv cross-sectional area of vent ein voltage applied to driver input SP...
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ژورنال
عنوان ژورنال: Journal of Low Frequency Noise, Vibration and Active Control
سال: 2018
ISSN: 1461-3484,2048-4046
DOI: 10.1177/1461348418757884