SURROUND SOUND
- It is stereophonic sound
- You feel surrounded by sound
- It provides the three-dimensional image and the presence
or ambience by giving the information of
direction and distance. [Japanese
Society of Acoustics]
- Natural sound that we experience is recognized from all
directions.
- Binaural hearing, or having two ears, gives clues of the
direction of sound.
(front ,rear ,left, right, upper, below)
- With surround sound, a listener who listens to the
playback of a recorded sound without
the actual real sound source can feel as
if he/she listens in a certain spot of the real original sound field.
That
means the localization cues were added to the sound.
- Surround sound is to reproduce a natural sound field in
space as the real sound source produces,
using binaural hearing with more than
two channels.
- Surround sound has not only pitches but localization cues
and reproduces
the original sound field abundantly.
- The auditory sense from surround sound system gives the
spatial sense to recognize
the information of image consequently.
SRS stereophonic
sound
Principle: We equalize
difference signals selectively according to ‘Perspective Curve’.
Difference signals of L-R and R-L have spatial cues. ‘Perspective
Curve’ takes into account the
characteristics of the ear shape that decides the ear’s frequency response according
to directions
and the constant-loudness contours
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