The performance of a stereophonic sound reproduction system is considered in terms of its wavefront reconstruction capabilities. A new theory of image localization is proposed and used to develop a more general stereophonic sine law which is valid at higher frequencies. The phenomenon of central image disappearance is considered, and the resulting analysis is shown to conform with subjective experience. A criterion is established for the frequency above which a stereophonic system can no longer provide high-fidelity reproduction. Practical results are provided to substantiate the proposed theories.
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