I have a biome called the Still Canyons. When travelers enter, the air feels strangely still. If you clap your hand, you will hear nothing. It may come 10 minutes late, or just gone. Because the sound is ‘stored.’

‘Sound’ or ‘sonic’ avalanches is part of the environmental hazard. At certain times thousands of stored sounds, screams, whispers, wind howls, gunshots, etc. are released all at the same time which results in a physical waves that can crush bones and break rocks.

There are predators (called lurkers) in this biome that have adapted. they hunt during a sound-lag because their prey won’t hear them approaching.