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Direct Sound and Reflected Sound
[Sound Perspective]
Direct sound issues from the source itself, such as those frequencies coming from an actors mouth. 

When a person is close to us, we hear essentially direct sound including low-frequency chest tones.

As the person moves farther away, we hear more of the reflected sound. 

Unfortunatly "direct sound" is also synonym for the original production sound

Reflected sound is produced by the direct sound bouncing off the walls, floor etc. Reflected sound s much more complex in character than direct sound because the surfaces are at different distances from the source and have widely varying reflective properties. 

Interiors that contains a lot of hard surfaces - glass, stone, metal, etc. - are said to be "live" because their high reflectivity. Soft or porous materials, like carpeting, draperies and upholstered furniture, are sound deadening. As furniture is moved into a empty room, the acoustics became "dead". 

Sound Perspective

Close perspective sound contains a high ratio of direct sound to reflected sound

Distant perspective sound contains a high ratio of reflected sound to direct sound

More about Sound Perspektiv at Queen's Film Studies (Audiomovies in Quicktime)

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Updated 22/3 1997 by Sven E Carlsson




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