Royal Decree 424/2005, of April 15, which approves the Regulation on the conditions for the provision of electronic communications services, universal service and user protection
UNE-EN ISO 24504:2016 (Ratified) Ergonomics. Accessible design. Sound pressure levels of vocal advertisements for sound products and systems (English)
UNE-EN ISO 24501:2010 (Ratified) Ergonomics. Accessible design. Sound pressure levels of auditory signals for consumer products (English)
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