Abstract
Audio sound reproduction using the nonlinear interaction of sound waves is investigated. Special emphasis is given to the sum and difference frequencies generated by the nonlinear interaction of two sound waves in a duct. The numerical and experimental results for scattered sum and difference frequency sound are presented and compared. The relationship between the difference frequency and the two primary sound waves are studied. It is found that the flat frequency response of the difference frequency can be achieved by adjusting the amplitudes of two primary waves. Finally, the sound reproduction using a single bi-frequency source is also investigated. The results for sum and difference frequency generation of this case are compared with those of the dual sources.
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