Acoustics of ducts and mufflers with application to exhaust and ventilation system design
A complete presentation and analysis of the major topics in sound suppression and noise control for the analysis and design of acoustical mufflers, air conditioning and ventilation duct work. Both fundamentals and the latest technology are discussed, with an emphasis on applications. Deals with reactive mufflers, dissipative silencers, the frequency-domain approach, and the time-domain approach.
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PROPAGATION OF WAVES IN DUCTS
THEORY OF ACOUSTIC FILTERS
AEROACOUSTICS OF EXHAUST MUFFLERS
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Acous acoustic filter acoustic impedance acoustic mass velocity acoustic particle velocity acoustic pressure acoustically lined aeroacoustic amplitude area discontinuities attenuation constant axial boundary conditions calculated cavity Chapter characteristic impedance circular ducts convective coordinates corresponding cross section cylinder diameter downstream effect of mean engine exhaust entropy evaluation exhaust mufflers exhaust pipe exhaust system expansion chamber experimental Figure finite element method finite wave analysis function hence impedance tube inlet insertion loss internal combustion engine length linear lined duct M. L. Munjal Mach number mean flow measured microphone moving medium nodes one-dimensional outlet particle velocity perforated element plane wave radiation impedance rectangular ducts reflection coefficient shown in Fig solution Sound and Vibration source impedance stagnation pressure standing wave stationary medium tail pipe temperature theory transfer matrix relation transmission loss upstream values variables wall wave number wave propagation yields zero