Les methodes de determination de la sonie des bruits

For some considerable time now specialists have taken an interest in the measurement and analysis of noise. They quickly understood that the process of perception of sounds by the ear was very complex and that it was difficult to relate a physical level or a sound level to people's impression of nuisance or loudness. Therefore several authors such as, for example, Stevens, Kryter and Zwicker, proposed different methods and different units. In a general way, these methods apply to continuous noise but they cannot be applied without care to discontinuous impulsive or transitory noise. Speech and music come into this latter category. The known methods according to the present author cannot be used for dealing with this type of noise.