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Some S1mple Propert1es of Acoust1c WavesFundamental
I4 Spherical Waves
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acoustic impedance amplitude angle apply approximately architectural acoustics attenuation binaural boundary branch capacitance coefficient conical consider constant corresponding cross section curves cycles cylindrical decrease denoted density diaphragm difference direction discussion displacement distance effect electrical equation of motion excess pressure expression figure Fig filter fluid G. W. Stewart given Helmholtz resonator Hence high frequencies horn incident increase indicated inertance intensity longitudinal wave low frequencies mass maximum measured medium membrane method microphone normal orifice oscillations particle displacement phase Phys plane wave plate problem quantity radiation radiation of sound Rayleigh reactance receiver reflected wave resonance frequency reverberation sound waves source of sound specific acoustic resistance spherical waves stethoscope substitution surface temperature theoretical theory tion tube velocity of sound velocity potential vibration viscosity volume current wave front wave length whence zero