JVC RC-838L Service Manual page 4

RC-838L/LB
BIPHONIC SYSTEM
The BIPHONIC system is the new method of acoustical
reproduction developed by JVC.
The BIPHONIC means that the BINAURAL program is
reproduced stereophonically through the speaker systems.
1.
No. 1380
BINAURAL SYSTEM
The BINAURAL system is to reproduce programs
recorded by two microphones which are located at the
both ear positions of artificial head acoustically
simulates ahuman head. 'The direction and distance of
sound sources can be distinguished when listening to the
binaural recorded programs through headphones. The
human distinguishes the direction and distance of sound
sources by level difference and time lag of sounds which
propagate to both ears.
Sound Source
& 2s
ir'
Ear-lap Ear-lap
Fig. 8
. BIPHONIC PROCESSOR
Artificial Head
Ls Rs
Biphonic Processor
"tS Re
Fig. 9
To improve the binaural effect the crosstalk should be
acoustically cancelled and the reflected signals should
be decreased.
Fig. 10
The optimum listening position of model RC-838 is set
between 60 to 80cm from the speakers.
. EXPANDED PLAYBACK
Ta aera. |
2-Channel Stereo
Biphonic Processor
Fig. 11
The BIPHONIC PROCESSOR also widens the sound
field of 2-channel stereo programs in listening through
the headphones, this is named "STEREO WIDE PLAY-
BACK".