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

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6.6. Sound pressure produced at distance r

We show in Eq. (13.104) that the far-field on-axis pressure produced by a plane circular piston in an infinite baffle is given by
p ˜ ( r ) = j f ρ 0 U ˜ c e j k r r = ρ 0 S D a ˜ c e j k r 2 π r
image (6.31)
where a ˜ c image is given by Eqs. (6.8), (6.9), and (6.13) so that
p ˜ ( r ) = e ˜ g B l S D ρ 0 ( R g + R E ) M M S · e j k r 2 π r α c
(6.32)
The frequency response ...

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