Since 2008
Echo VS Reverb
In the fifth episode of the “Back to Basics” series, Dennis Foley clarifies the distinction between echo and reverberation, two terms that are often used interchangeably but have different meanings in room acoustics. He emphasizes that while they are closely related, understanding their differences is crucial for achieving optimal sound quality in a room.
”Echo is sound bouncing off surfaces, while reverberation is the quantity of this reflected sound in a room.
Dennis Foley
In Summary
Echo is the result of sound or a series of sounds reflecting off surfaces, causing repeated bouncing between the surface and the listener. A common example of this is the flutter echo, which is a rapid series of echoes caused by sound waves bouncing between parallel surfaces. On the other hand, reverberation refers to the persistence of sound in a room after the original sound has ceased.
It’s about the quantity of reflected sound in the room, and it’s measured using the RT60 time, which is the time it takes for the sound to decay by 60 decibels. While echo is about the interaction of sound with surfaces, reverberation is about the overall persistence and quantity of sound in a space.
Key Takeaways
- Echo is caused by sound reflecting off surfaces, leading to repeated bouncing.
- Flutter echo is a rapid series of echoes, often heard in small rooms.
- Reverberation is the persistence of sound in a room after the original sound stops.
- RT60 time measures the decay of sound in a room.
- Understanding the difference between echo and reverberation is crucial for room acoustics.