Sound is a fundamental aspect of the environment and critical to ecosystems. Research has found that plants perceive sound as a mechanical stimulus that can encourage the flow of nutrients, promote growth, and strengthen their immune systems. Now, a new study by Flinders University in South Australia suggests the same might be true of soil. The researchers investigated how acoustic stimulation affected a soil-resident, plant-growth-promoting fungus and whether it's possible to use sound to restore a damaged ecosystem.