23 pages matching directivity pattern in this book
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INTRODUCTION AND TERMINOLOGY
THE WAVE EQUATION AND SOLUTIONS
19 other sections not shown
absorption acoustic compliance acoustic impedance acoustic mass acoustic power acoustic resistance analogous circuit assumed average band basilar membrane cavity circuit of Fig cone crystal curve cycles per second decibels determined diameter diaphragm direct-radiator loudspeaker directivity index directivity pattern distance electrical element enclosure energy density equal equation example frequency range given by Eq horn impedance-type infinite baffle logio loudness level low frequencies magnitude measured mechanical impedance microbar microphone mks acoustic ohms mobility mobility-type mode of vibration noise normal open-circuit voltage 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 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