The audibility of variations of decay parameters in plucked string synthesis was studied by a listening test. The decay was described by an overall time constant and a frequency-dependent parameter. Two fundamental frequencies, tone durations, and types of excitations were used for both parameters. The results indicate that variations between 25 and 40% in the time constant are inaudible. This suggests large perceptual tolerances for the decay parameters. The results are applied in model-based audio processing.
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