---
title: The Sound of Aerogel – World’s Lightest Material — HIGH T3CH
url: https://hight3ch.com/the-sound-of-aerogel-worlds-lightest-material/
date: 2015-03-06
---

# The Sound of Aerogel – World’s Lightest Material

Aerogel is a synthetic porous ultralight material derived from a gel, in which the liquid component of the gel has been replaced with a gas. The result is a solid with extremely low density[1] and low thermal conductivity. Nicknames include frozen smoke,[2] solid smoke, solid air, or blue smoke owing to its translucent nature and the way light scatters in the material. It feels like fragile expanded polystyrene (Styrofoam) to the touch.