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Acoustics: Sound Fields, Transducers and Vibration, 2nd Edition by Tim Mellow, Leo Beranek

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4.19. Plane circular piston in infinite baffle

The specific impedance in N·s/m3 of the air load on one side of a plane piston mounted in an infinite baffle (see Fig. 13.3) and vibrating sinusoidally is given by Eqs. (13.116)–(13.118). Plots of the real and imaginary parts of
Z s ρ 0 c = R s + j X s ρ 0 c
image (4.145)
are shown in Fig. 4.35 as a function of ka. Similar graphs of the real and imaginary parts of the specific admittance
Y s ρ 0 c = ρ 0 c ( G s + j B s ) = ρ 0 c ( R s R s 2 + X X s j X s R s 2 + X s 2 )
(4.146)
are shown in Fig. 4.36

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