A method and apparatus for determining masked thresholds for a perceptual auditory model used, for example, in a perceptual audio coder, which makes use of a filter bank structure comprising a plurality of filter bank stages which are connected in series, wherein each filter bank stage comprises a plurality...http://www.google.de/patents/US20020147595?utm_source=gb-gplus-sharePatent US20020147595 - Cochlear filter bank structure for determining masked thresholds for use in perceptual audio coding