THEORY, DESIGN AND TESTS OF FLEXIBLE WALL ACOUSTIC FILTERS.
HYDRONAUTICS INC LAUREL MD
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The theory for flexible wall liquid-filled acoustic filters of two different types is presented. Equations are derived for the performance prediction of volume resonators in infinite pipelines and in finite pipelines with arbitrary termination. The effect of noise on filter performance is studied and illustrated. An experimental determination of the performance of a volume resonator filter indicates good agreement with theory. Equations are presented for the performance of expansion chamber filters. Their advantages and disadvantages for different situations are discussed. For the special case of high pressure pipe systems, it is concluded that volume resonators are more suitable than expansion chamber filters. Author