When binaural sound signals are presented with loudspeakers, the system inversion involved gives rise to a number of problems such as a loss of dynamic range and a lack of robustness to small errors of control performance. These problems for such systems are investigated and a new system concept is proposed. The system overcomes these fundamental problems by means of a conceptual pair of monopole transducers whose span varies continuously as a function of frequency. A practical solution for the realization of a variable transducer span by discretization is also described.

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