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Voiceover Technology FAQ > STUDIO ACOUSTICS/SOUND PROOFING > How can I best treat my room acoustically to make a great sounding recording?

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This is a very deep subject, but we'll give you a couple  of quick pointers.

1-  Absorbtion - When you clap your hands and listen to the reverb (echo), the longer it takes to decay (disappear), the more absorbtion you require.  A proper voiceover recording space should have very little reverb.  You want your room to  have a lot of objects or materials that absorb all parts of the audio spectrum.  This can mean heavy drapery, a closet full of clothing, acoustic panels made of specially designed foam or fiberglass wrapped in fabric, or furniture.

2-  Diffusion - While it can really make a room sound great, it's more challenging to get diffusion right, so we recommend focusing on absorbtion. Random objects of different shapes reflect different audio frequencies and diffuse them about the room.  Book shelves full of different sized books can do a great job of this.  You can buy diffusion panels but they tend to be very expensive. 

3-  Sound "proofing" - Do you hear cars, aircraft, leaf blowers, birds, dogs and other noises in your recording space?  The first two things above will not help you with these problems.  Sealing your room from outside noise, the way you would for weather proofing, helps, but it may be necessary to increase the density of the walls, windows, floors and ceiling, as well.  Adding mass is one of the only true ways to reduce noise. 

Last updated on November 5, 2009 by George Whittam