Meringue-like material could make aircraft as quiet as a hairdryer: Extremely low-density graphene-based aerogel 'meringue' can improve passenger comfort and reduce noise up to 80%

An incredibly light new material can reduce aircraft engine noise and improve passenger comfort. The graphene oxide-polyvinyl alcohol aerogel weighs just 2.1kg per cubic meter, making it the lightest sound insulation ever manufactured.