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Topic: Suggestions on EQ-inga small room
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Christos Mitsakis
Expert Film Handler
Posts: 242
From: Ag.Paraskevi, ATHENS, GREECE
Registered: Sep 1999
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posted 12-13-2008 03:03 AM
quote: Scott Norwood
some setups and rooms seem to sound really great for music and lousy for dialogue, while others are the opposite. Why? Is it the extend to which the room is "too live" or "too dead" (what is the technical term for this?)?
Scott,
"Reverberant" and "non reverberant" but "live" and "dead" are also terms used in evry day practice. Music produced from acoustical instruments benefits from a room with a certain amount of reverberation. This is also dependent on how the sound is produced ie bowed instruments "prefer" a higher reverberation time than brass. There is always a point of "golden" balance for rooms that will stage a symphony orchestra, also rooms that reverberation can be raised or lowered by adding panels, curtains, or movable stage fixtures, to accommodate different ensembles or opera.
Rooms for speech have to be non reverberant as the high reverberation kills speech intelligibility, but at the same time makes music sound dull.
quote: Scott Norwood
Large rooms also seem to have low-frequency issues. I'm familiar with one (large 1920s house) that has a nasty bump at around 200-250Hz. How does one go about fixing something like this?
By using Bass traps tuned to a specific center frequency. They absorb (actually transform) the energy reducing its overall impact in the room. Bass traps can be either simple Helmholz resonators (like a bottle) or passive panels that vibrate, thus absorbing - transforming acoustical energy to thermal.
C.
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