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 Bordwell's &Thompson's  Terminology 
Acoustic properties: 


The sound we hear results from vibration in the air. The amplitude, or breadth, of vibrations produces our sense of loudness, or volume. Film sound constantly manipulates sound volume. For example, in many films a long shot of a busy street is accompanied by loud traffic noises, but when two people meet and start to speak, the loudness of the noise is characterized as much by the difference in volume as by the substance of the talk. 

Loudness is also related to perceived distance; often the loader the sound, the closer we take it to be. The couple's dialogue, being louder, is sensed as in the acoustic "foreground", while the traffic noise sinks to the background.  

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