Number of Significant Harmonics       Highest Frequency

Bright Sound                 11                                5280

Dark Sound                    8                                3520

                 Number of Significant Harmonics       Highest Frequency

Bright Sound                 17                                7480

Dark Sound                    4                                1760

The data for the poor sounds is much more difficult to show in a table or other graphic form. Therefore I will describe the results.

The puffed cheeks exercises produced very bright sounds and poor attacks, but a relatively characteristic tone without too much distortion. In fact the puffed cheeks experiment results for trumpet 1 were very similar to the bright sound results for trumpet 2.

In the experiments done with a closed jaw, both trumpets produced a large number of non-harmonic pitches in the range between 4500 Hz and 5200 Hz. This came across graphically as a large block of 20 dB harmonics instead of the normal formation which shows a series of stalagmite projections at regular intervals.

In the experiments done where the instrumentalists were asked to make a bad sound, the results were very similar to the closed jaw exercises, except that the noise harmonics were lower in range, more in the 750 Hz to 2000 Hz area.

Back to the Data Page.

Back to the Home Page

Back to the Outline