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Extending sharpness calculation for an alternative loudness metric input.

Sound quality metrics help improve the psychoacoustic acceptability of devices and environments by modeling and thus enabling deliberate improvement of perceptual attributes. Sharpness as defined in DIN 45692 [(2009). Deutsches Institut für Normung, Berlin] requires inputs from Zwicker's loudness metric [ISO 532-1 (2017). International Organization for Standardization, Geneva]. This letter demonstrates that sharpness can be formulated to accept specific loudness values from Moore and Glasberg's loudness metric [ISO 532-2 (2017). International Organization for Standardization, Geneva; ANSI S3.4 (2007). American National Standards Institute, Inc., Washington, DC]. Sharpness calculations using the two loudness metrics produce similar results. This method thus enables evaluation of sharpness as a straightforward add-on to standard loudness calculations using Moore and Glasberg's metric, for which sharpness calculations were not previously available.

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