Pys.org  June 18, 2021 Researchers in the UK have developed an ultralight graphene oxide (GO)/polyvinyl alcohol (PVA) aerogel (GPA) with hierarchical and tunable porosity embedded in a honeycomb scaffold. The aerogels have an enhanced ability to dissipate sound energy, with an extremely low density of 2.10 kg m−3. They experimentally evaluated and optimised the effects of composition and thickness on sound absorption, and sound transmission losses. Then employed a semi-analytical approach to evaluate the effect of different processing times on acoustic properties and assessed the relationships between the acoustic and non-acoustic properties of the materials. Over the 400–2500 Hz range, […]