Source google image: https://fff.ch/sites/default/files/styles/large/public/SEC_schallschutz_f05_fr_0.jpg?itok=offzMLDQ
Isolation acoustique 34
Source google image: https://fff.ch/sites/default/files/styles/large/public/SEC_schallschutz_f05_fr_0.jpg?itok=offzMLDQ