Soundproofing your garage correctly can help prevent a fluttering echo in the space. Such echos can be an undesirable sound effect that alter your acoustics. You can tell you have a fluttering echo problem by standing in your empty space and clapping your hands. If the sound of your clap echos around the room, you have a fluttering echo. There are two easy thing you can do in addition to soundproofing your walls to prevent this pesky sound.
Why Fluttering Echo Exists
Echoes happen when sound bounces off a hard surface and reflects back toward you. When you make a sound, the sound travels outward and away from you—the sound will then either be absorbed or reflected. When sound is absorbed, it doesn't create an echo. When sound is reflected, you get an echo effect. If you're in a space with reflective surfaces, you will get an echo. A fluttering echo can occur between any two reflective surfaces. It can be reflected from horizontal surfaces or vertical surfaces. Anywhere that sound vibrations can bounce off a surface, you can have a fluttering echo.
Tip 1 - Its Not Just Your Walls
Flutter echo is common in rooms or spaces that have absorbent walls but also have reflective floors and ceilings. Simply creating a soundproof room, with soundproof absorbent walls is not enough when you are looking to achieve a good acoustic sound within your space. When trying to rid fluttering echo from your space, you need to think about all of the surfaces that sound can reflect back from.
Soundproofing walls will absorb the sound, creating a soundproof room. As well, the absorption of the sound prevents the walls from reflecting the sound vibrations back toward you. However, unless you also do something with your floors and ceiling to prevent sound reflection, you will still have a fluttering echo of the sound reflecting off the floors and ceiling and bouncing back to you. To prevent the floors and ceilings from creating a fluttering echo, you need to insulate or cover them with an absorbing material.
Tip 2 - Shape Matters
Another good idea to prevent fluttering echo and improve acoustics in a soundproof room is to minimize the parallel surfaces in your room. Typically, a room is square with walls parallel to each other and the floor and ceiling parallel to each other. To lessen the fluttering echo effect and improve overall acoustics, you should think about altering the room shape. Any trapezoid shape will work, as long as it alters the parallel walls.
Imagine if you were standing in a perfectly square room and you threw a ball against the wall. Chances are the ball will come bouncing right back at you. Now, imagine you are in a trapezoid shaped room that does not have parallel walls. If you throw the ball against a wall, depending on where it hit, it could fly off in varying directions. The ball could bounce off any wall and will move freely around the room. This is the effect you're going for to prevent the fluttering echo effect of sound bouncing back and forth off parallel surfaces.