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Chapter Four

Room Acoustics and Means of Control

[The negative aspects of an isolation shell. Basic wave acoustics. Reflexions. Resonant modes and forced modes. The pressure and velocity components of sound waves. Modal patterns. Flutter echoes. Reverberation. Absorption. The speed of sound in gases and the ratio of the specific heats. Porous absorbers, resonant absorbers and membrane absorbers. Q and damping. Diffusion, diffraction and refraction.]

As explained in the previous chapter, the main means by which we achieve the necessary sound isolation in recording studios is by reflexion, because absorption is very inefficient as a means of isolation. In typical isolation shells, the sound produced within the rooms is almost all reflected ...

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