Acoustics for Engineers: Troy Lectures

By Jens Blauert

Blauert's and Xiang's "Acoustics for Engineers" offers the cloth for an introductory path in engineering acoustics for college students with easy wisdom in arithmetic. within the moment, enlarged version, the instructing facets of the e-book were considerably enhanced. conscientiously chosen examples illustrate the appliance of acoustic ideas and difficulties are supplied for training.

"Acoustics for Engineers" is designed for vast educating on the college point. lower than the suggestions of a tutorial instructor it's adequate because the sole textbook for the topic. each one bankruptcy offers with a good outlined subject and represents the fabric for a two-hour lecture. The 15 chapters exchange among extra theoretical and extra application-oriented concepts.

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124 nine. four Line Arrays of Monopoles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . a hundred twenty five nine. five Analogy to Fourier Transforms as utilized in sign concept . . . . . 127 nine. 6 Directional Equivalence of Sound Emitters and Receivers . . . . . a hundred thirty Contents IX 10 Piston Membranes, Diffraction and Scattering . . . . . . . . . . . . 133 10. 1 The Rayleigh indispensable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134 10. 2 Fraunhofer’s Approximation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . one hundred thirty five 10. three The a long way box of Piston Membranes . . . . . . . . . . . . . . . . . . . . . . . . 136 10. four The close to box of Piston Membranes . . . . . . . . . . . . . . . . . . . . . . 138 10. five normal feedback on Diffraction and Scattering . . . . . . . . . . . . . . 142 eleven Dissipation, mirrored image, Refraction, and Absorption . . . . . . . . a hundred forty five eleven. 1 Dissipation in the course of Sound Propagation in Air . . . . . . . . . . . . . . . 147 eleven. 2 Sound Propagation in Porous Media . . . . . . . . . . . . . . . . . . . . . . . 148 eleven. three mirrored image and Refraction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151 eleven. four Wall Impedance and measure of Absorption . . . . . . . . . . . . . . . . . . 152 eleven. five Porous Absorbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . one hundred fifty five eleven. 6 Resonance Absorbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158 12 Geometric Acoustics and Diffuse Sound Fields . . . . . . . . . . . . 161 12. 1 replicate Sound assets and Ray Tracing . . . . . . . . . . . . . . . . . . . . . 162 12. 2 Flutter Echoes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . one hundred sixty five 12. three Impulse Responses of oblong Rooms . . . . . . . . . . . . . . . . . . 167 12. four Diffuse Sound Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169 12. five Reverberation-Time Formulae . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172 12. 6 program of Diffuse Sound Fields . . . . . . . . . . . . . . . . . . . . . . . . 173 thirteen Isolation of Air- and Structure-Borne Sound . . . . . . . . . . . . . . 177 thirteen. 1 Sound in Solids – Structure-Borne Sound . . . . . . . . . . . . . . . . . . . 177 thirteen. 2 Radiation of Airborne Sound by way of Bending Waves . . . . . . . . . . . . . 179 thirteen. three Sound-Transmission lack of Single-Leaf partitions . . . . . . . . . . . . . . . 181 thirteen. four Sound-Transmission lack of Double-Leaf partitions . . . . . . . . . . . . . . 184 thirteen. five The Weighted Sound-Reduction Index . . . . . . . . . . . . . . . . . . . . . 186 thirteen. 6 Isolation of Vibrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189 thirteen. 7 Isolation of flooring with reference to affect Sounds . . . . . . . . . . . 192 14 Noise keep watch over – A Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195 14. 1 Origins of Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196 14. 2 Radiation of Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196 14. three Noise relief as a procedure challenge . . . . . . . . . . . . . . . . . . . . . . 2 hundred 14. four Noise aid on the resource . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203 14. five Noise aid alongside the Propagation Paths . . . . . . . . . . . . . . 204 14. 6 Noise relief on the Receiver’s finish . . . . . . . . . . . . . . . . . . . . . 208 15 Appendices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211 15. 1 complicated Notation for Sinusoidal indications . . . . . . . . . . . . . . . . . . . . 211 15. 2 advanced Notation for strength and depth . . . . . . . . . . . . . . . . . . 212 15. three Supplementary Textbooks for Self examine . . . . . . . . . . . . . . . . . . . 214 15. four routines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215 15. five Letter Symbols, Notations and devices . . . . . . . . . . . . . . . . . . . . . . . 234 Index . . . . . . . . . . . . . . . .

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