Simulation of the psycho-acoustical vowel space for linguistic applications

Despite of the the remarks concerning the perceptual formant integration and some other factors, it is assumed that an Fl/F2plot based on Bark-scale, in which the vowel points can be plotted according to a continuous scale, is capable to show in the most cases the psycho-acoustical vowel differences concerning the features front/ back, closejopen, and rounded/ unrounded (with some consideration also tense/lax). About 50 vowel symbols have been used for the description of the vowel systems of the world. About the same nurober of 1 Bark sized circles have room on the physiologically possible Fl/F2-space. This nurober seems to be near the general Fl/F2 vowel resolution. Different scales of the Fl/F2-plot for the psycho-acoustical simulation, exemplified by German vowel material, are compared with each other: full logarithmic (A); linear up to 510Hz, logarithmic above 510 Hz (B); technical mel-scale (C); Fl/F2'plot (D).