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The Behavior of Sound Waves P A Franken
Mufflers T F W EmbUton
Isolation of Vibrations D Muster
7 other sections not shown
A-weighted absorption coefficient accelerometer acoustic amplitude angle approximately attenuation average band bandwidth bending waves Beranek and Newman blanket calculated critical frequency curve damping decibels density determined direction distance duct effects enclosure energy equal equation example excess attenuation excitation filter flow resistance force frequency range function given impedance incident increases insertion loss length longitudinal waves loss factor loudness m/sec mass mean-square measured mechanical meter microphone modes of vibration muffler noise level normal octave-band panel parameter piezoelectric pipe plane plate power radiated pressure propagation quency radiation ratio reflection loss region resonance frequency shown in Fig signal sound field sound level sound power sound source sound wave sound-power level sound-pressure level space spectrum speed of sound stiffness structure surface Table temperature thickness tion transmission loss tube viscoelastic viscoelastic layer voltage wall watts wavelength wavenumber