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Sound waves in one dimension
Sound waves in three dimensions
Transmission through layered media
5 other sections not shown
20 logio absorbed absorption coefficient acoustic impedance amplitude angle of incidence average boundary conditions calculated centre frequency characteristic impedance complex algebra cos2 cross-sectional area dB(A decibels dimensions displacement energy density equal exponential fluid frequency bands function given gives gradients harmonic Helmholtz resonator high frequencies illustrated in Fig imaginary incidence absorption coefficient incident wave intensity level longitudinal waves loudness low frequencies measured medium modal density Nm~z noise level normal impedance normal incidence obtained octave band one-dimensional particle velocity particular phase phons pipe piston poc2 pressure and particle pressure fluctuation pzcz radiation ratio rectangular reflected wave resonant frequency reverberation rms pressure shown in Fig side branch solid solution sones sound field sound pressure level sound wave spherical standing wave substitution surface transmitted tube values velocity of sound vibrations volume velocity wave equation Wave number wave travelling wavelength weighting network zero