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The Wave Theory of Sound l
Quantitative Measures of Sound
Reflection Transmission and Excitation
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absorption coefficient acoustic energy acoustic field acoustic impedance acoustic inertance acoustic power acoustic pressure amplitude analogous angle angular frequency applies approximation asymptotic average axis band boundary condition caustic complex amplitude component Consequently constant constant-frequency coordinates corresponding creeping wave decibels decreases derived described determine diffraction direction discussed distance duct energy density Euler's equation example expression factor finite flow fluid velocity Fourier function geometrical-acoustics Green's function Helmholtz Helmholtz equation Helmholtz resonator incident wave inhomogeneous integral interface limit mass medium muffler nonlinear normal oscillating phase Phys piston plane wave plane-wave power output prediction quantity radiation radius ratio ray path Rayleigh reflected relation replaced resonance reverberation rigid satisfies scattering shock solution sound speed sound-pressure level spatial spectral density sphere spherical surface theorem tion transducer transmission tube variable vibrating viscosity volume velocity wall wave equation waveform wavefront wavelength yields zero