Det er IKKE nødvendigt at lydisoler alt.

Her er et svar fra fx. deadening.co.uk

We recommend a minimum coverage of 50% across the panel. This is enough to remove vibration and resonance from the metal and stop the noise amplifying and "booming". Some areas will respond well to 100% coverage though such as wheel arches, floor, footwells etc. 100% coverage will help block airbourne noise passing through the panel. Kind Regards, Matt — Sound Deadening Shop / Silent Coat UK / Dodo Mat CAD Distribution Ltd