Diplomarbeit - Institut für Elektronische Musik und Akustik - IEM

The "thin" timbre showed a completely different graph. Some of the partials were much more prominent, and the"noise" (broad band signal) was reduced considerably. The screen shot has a much more edgy appearance, thesharp peaks being the harmonic partials of the pitch frequency. I still play a C6, but I raise the palate as much aspossible, mimicking a giant yawn while playing.If one compares the shape of the graphs, it changes considerably around 5 kHz, and this isapparently where the most audible change of timbre takes place. The "thick" tone has a broad bandsignal (which in my vocabulary corresponds to "noise" or "white noise"). This signal is present overmost of the range up to 10 kHz and is considerable greater than that in the "thin" tone. The partialswere present but the the noise was almost never large enough to obscure harmonic partials. The"thin" tone has stronger partials in range 6-8 kHz, over a wide range of notes over the range of theinstrument. The difference in broad band signal is easy to hear and to identify as a significant change5