by 3 hours ago
ANSWERS: 3
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There are a few reasons, but one of the biggest is that some rooms have something that absorbs/dampens the sound instead of reflecting it. Sometimes it's obvious (acoustic foam padding), others times less obvious (cloth couch), and sometimes subtle. And of course, there is also the shape of the space. Most of your decent old theatre (pre-electricity) were designed to reflect the sound clearly to the audience, whereas your average bathroom was not.
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My observation, whenever there is nothing inside a room, it echoes. Except of course for recording studios. =)
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Small rooms will not house echoes because the reflections come too quickly, and end up either strengthening or distorting the origanal source. Large rooms on the other hand can house delayed refections, such as between the stage and rear wall of a concert hall. These delayed reflections can be classed as echoes. Flutter echoes can occur in small spaces between parellel walls, where a sound repeatedly reflects back and forth.
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