France Code de la Santé Publique (Public Health Code) Article L.5232-1.

France introduced specific legislation (Code de la Santé Publique (Public Health Code) Article L.5232-1.) relating to protection of consumers hearing when using portable music players with headphones.

This national requirement was later withdrawn when equivalent technical requirements were introduced to standards employed by the R&TTE (1999/5/EC) and Radio Equipment Directive (2014/53/EU).

For earlier products in scope, you can find the declaration of conformity for your legacy product via the link

Products after January 2013, the presence of the CE mark shows compliance with equivalent requirements, and no separate declaration is required.