 The affectedness of the medium is a feature which is mostly evident, and almost pervasive in the case of sounds, because of the relatively similar size of the phenomena involved at the source and in the medium proper. Vibrations in the sounding objects are macroscopic phenomena, of a size which is fairly comparable to the size of the sounding object itself. Therefore the interaction of these vibrations with the surrounding medium can easily be a source of misperception, for their impact on the medium brings about processes which are of the same order of magnitude of the object involved.