Duration: 04:52 | After a concert, you find it difficult to hear your friend rave about the show. It sounds like they're speaking from across the room, and it's tough to make out their voice over the ringing in your ears. But, by the next morning, the effect has mostly worn off. So what caused these symptoms? And can you go to concerts without damaging your ears? Heather Malyuk explores the properties of sound. [Directed by Anne Beal, narrated by Bethany Cutmore-Scott, music by Michael MacDonald].