Employing all the techniques described in the preceding sections, it is possible to analyze large speech corpora with the VokalJäger in a fully automated way. This was done in Keil (2018, p. 112-165) for the Kiel PHONDAT Corpus, which serves as a reference for High German [Kohler 1994].
High German formants in the F1/F2 plane
The results show the patterns, which are expected for High German. Below diagram documents the distribution of the formants in the F1/F2-plane as measured with the VokalJäger [Keil 2017, figure 56, p. 151; colored version]. The ellipses plotted are idealized areas to contain 50% of the respective measurements. Note that the values are after normalization and are re-projected to the hypothesized androgenic speaker of High German – as such they are across the data of both genders within one chart. The patterns align nicely with those published in other studies, most notably those reported by Pätzold/Simpson (1997), which investigated the Kiel PHONDAT Corpus as well [Keil 2017, p. 159-164]. There is one exception to the expected pattern: a centralization of [uː] respectively a backing of [oː]. That may be related to the words selected – respectively to the consonant conditions for those utterances – in the Kiel corpus [Keil 2017, p. 150; Pätzold/Simpson 1997, p. 13].
Tabulated High German formants
As reference, the measured High German formant values are documented in the following tables (with key formant statistics listed: median F1/F2 and lower plus upper quartiles). The first table documents the original F1/F2 values by gender, before any normalization was applied:
The second table shows the F1/F2 values after normalization (those being the values corresponding to above F1/F2 plot). The results are re-projected (German: “rückprojiziert”) to the vowel-space occupied by both sexes. Hence the values correspond to those of a hypothesized androgenic speaker of High German and there is no distinction between male and female speakers [Keil 2017, p. 92].
Much more results can be found in chapter 5 of Keil (2017), which is available here in in its entirety.