The Mus?e national des arts et traditions populaires in Paris - now the MuCEM, to open shortly in Marseilles - and the Mus?e des musiques populaires de Montluçon recently built up collections based on sociological field research over long periods. These collections concern material and immaterial cultures relative to the emergence of electro-amplified musics in French lifestyles. The question of paroxysmal sound (both auditory and vibratory), of the culture of the potentiometer, of decibelism and vibrationism, are new anthropological dimensions in museology. Working with museums enables the researcher to envisage original ways in which research can turn back to publics.