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INTRODUCTION AND TERMINOLOGY
THE WAVE EQUATION AND SOLUTIONS
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absorption acoustic compliance acoustic impedance acoustic mass acoustic power acoustic resistance analogous circuit assumed average band Bimorph capacitance cavity circuit of Fig cone crystal curve cycles per second decibels determined diameter diaphragm direct-radiator loudspeaker directivity index directivity pattern displacement distance electrical element enclosure energy density equal equation example frequency range function given by Eq horn impedance-type infinite baffle length logio low frequencies magnitude measured mechanical impedance microbar microphone mks acoustic ohms mobility mobility-type mode of vibration noise particle displacement particle velocity piston plane power level quantity quency radiation impedance radius ratio reactance resonance frequency response reverberant Rochelle salt shown in Fig side sound energy sound energy density sound field sound pressure level sound source sound wave specific acoustic spherical square meter surface temperature throat transducer tube unit voice coil volume velocity wall wavelength zero