Quote Originally Posted by walpurgis View Post
When I was decorating the bathroom and it was empty, I tried clapping my hands to listen to the reverb and it was very noticeable. I hung only one thick bath towel on a rail and clapped again and the reverb was gone. Illustrates the principle.
Used to call it 'flutter echoes', probably still do. Many of my jobs involved working in bare empty rooms, where conversation was more difficult sometimes to follow when the radio was on, the sounds all bled into each other.