1. Noise definitions

The first ambiguity that characterizes the notion of noise arises from its very definition.

According to the authors, noise is both a physical and a subjective phenomenon, the latter in the perceptual as well as the cultural sense.

In the classic works (Larousse, Robert), noise is defined in reference to music, which, from the perspective of working conditions, would be hard to justify: "a set of sounds without harmony", "a phenomenon due to a superposition of various non-harmonic vibrations", or "that which, in what is perceived in the ear (sic), is not felt as musical sound".

Only the Anglo-Saxons deliberately...