Betrachtungen zum musikalischen Zusammenklang

Owing to the limited time constant and the non-linear distortion of the human ear the sound impression does not only depend upon the amplitudes, but also upon the phases of the harmonics, i.e. on the envelope of the sound phenomena. This hearing of the envelope is not only important for the sensation of distance and direction, but also plays a fundamental role in musical acoustics. It is the cause of numerous acoustic illusions. Th e hearing of the envelope and the frequency dependence of the internal friction of timber used for musical instruments offer a natural explanation for the quality of old violins.