Sensory pleasantness is computable from sharpness, roughness, tonality, and loudness.

Evidence

The relationship between relative values of sensory pleasantness and those of sensation sharpness, roughness, tonality, and loudness can be approximated using equations. A model for the calculation of sharpness has already been given. The sensation of roughness can also be calculated (see Chap. 11). A procedure for calculating the sensation of tonality does not yet exist so that it may be subjectively estimated as a first approximation, while loudness can be calculated relatively precisely. Therefore, it is possible to put the dependencies given in Fig. 9.4 into an equation that contains relative values of sharpness, roughness, tonality, and loudness. The result leads also to a relative value, P / Po, of sensory pleasantness. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1375

Categorization

• QUESTION: Tonality still lacks a calculation procedure and relies on subjective estimation, so the pleasantness formula is only partially objective.