Because sound and noise are ultimately judged by humans, measurement systems should yield information that relates to the way humans hear. In addition to providing for the binaurally complex technical properties of human hearing with an aurally correct recording system, parameters corresponding to psychoacoustic responses of human hearing can be measured. Binaural recording captures the attributes of directional hearing. Binaural signal processing takes advantage of the directional hearing, selectivity, and noise suppression in human responses to obtain parameters such as loudness, masking, roughness, sharpness, and tonality. These approaches are especially important for quantifying complex sound situations, such as sound fields with several spatially distributed sound sources. The power of a binaural psychoacoustic workstation is applicable to evaluation of equipment as well as acoustical environments.
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