You could soon be wearing earplugs made out of…..fungus

Next time the neighbors are blaring their music too loud, and you’re at a loss for earplugs or noise-cancelling headphones, just shove mushrooms in your ears.

Wait — what? Would that even work, and would it give you ear fungus? Probably not (to the ear fungus too), but scientists have figured out how to make earplugs and other sound-absorbing stuff from mycelium (above). You know it has to be effective when it’s the same stuff being considered for habitats on Mars. Fungus has an advantage over other materials. Its structure is strong enough to need less of it to absorb blasting music, motors and everything else. It could eventually be used as an insulator in everything from furniture to electrical appliances to clothes.

Whether it’s your neighbor’s radio cranked up to eleven or the incessant symphony of rush-hour traffic, ambient sound actually does affect your health. There isn’t much we can currently do about it. Soundproofing materials that currently exist are mostly synthetic mineral fibers or foams that don’t absorb sound that well and are usually not recyclable or sustainable. Fraunhofer Institute for Environmental, Safety and Energy Technology UMSICHT is now collaborating with the Franunhofer Institute for Building Physics IBP to see how they can merge mycelium with other organic materials and 3D-print it into earplugs and other things you would probably never associate fungus with.

“The material, which is permeated by mycelium, has a solid structure,” said Roman Wack, a project partner with Fraunhofer IBP, in a press release. “This means that much thinner layers of it could be used to make sound absorbers.”

Mycelium is the larger underlying body for fungi that may or may not spawn mushrooms. If a mushroom could be compared to a tree, then mycelium would be the tree’s vast subsurface network of roots. Fungi spread spores everywhere. These spores eventually land somewhere and germinate into what will turn into mycelium. The mycelium continues to grow by releasing enzymes from the tips of its hyphae, which are long filaments that branch out undergorund much like tree roots do, though they look more like spiderwebs.

There is such an interest in taking myco-materials to Mars because you don’t need much to start with, meaning next to no added weight on the payload except the minimal nutrients needed to grow them. These materials are surprisingly strong in their final state. Habitats created from them will absorb the killer radiation that strikes the Red Planet to keep it from getting to the astronauts inside. The same thinking is behind using such materials as sound absorbers. When mycelium is mixed with other eco-friendly materials like wood, straw and food waste, what comes out of the 3D printer is solid because it has hyphae spread everywhere. It is then heated in a kiln to kill the fungus that would otherwise keep growing almost infinitely.

What comes out of this process is a substance that has open cell walls that absorb sound. 3D printing actually makes the material even more effective because it can be programmed to give the sound-absorbing material a porous structure that will keep being advanced as the research teams continue to develop it. Not only will this material be renewable, but it is expected to outperform whatever we rely on to keep noise at a minimum right now. Earplugs and insulating materials made of mycelium is more effective at keeping the sounds of screaming kids, roaring leaf blowers and whatever the neighbors are doing where they belong.

This isn’t it for myco-materials. Besides Mars, they are also headed to everything from furniture and electoral appliances to plastics and even faux leather.

“There’s currently a focus on vegetal substrates and mycelium for the development of new materials,” said Julia Krayer, project manager at Fraunhofer UMSICHT, in the same press release. “The end products could probably be used as insulating material, but this would require more intensive research.”

This article was first featured at https://www.syfy.com/syfywire/you-could-soon-be-wearing-earplugs-made-of-fungus on January 5, 2021 at 11:35AM by Elizabeth Rayne