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Acoustics: Sound Fields, Transducers and Vibration, 2nd Edition
book

Acoustics: Sound Fields, Transducers and Vibration, 2nd Edition

by Leo Beranek, Tim Mellow
May 2019
Intermediate to advanced content levelIntermediate to advanced
900 pages
29h 35m
English
Academic Press
Content preview from Acoustics: Sound Fields, Transducers and Vibration, 2nd Edition

6.9. Efficiency

Medium frequencies

The efficiency of a loudspeaker is defined as 100 times the ratio of the acoustic power radiated to the power supplied by the electrical generator. In the medium frequency range between the suspension resonance and the point where the coil inductance starts to contribute to the electrical impedance, the power supplied by the generator is approximately
W E e g ( rms ) 2 R E
image (6.46)
where we are assuming that R g     R E . Using W from Eq. (6.23), the reference efficiency E ff is then given by
E f f = 100 W W E 100 B 2 l 2 S D 2 ρ 0
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Publisher Resources

ISBN: 9780128152287