EXAMPLES OF APPLICATIONS UTILIZING THE SH-8066 FUNCTIONS
The sound level of the 12 frequency divisions
in
the 25
Hz-16
kHz frequency range can be easily and selectively corrected by
means of the band
level control
of
this unit.
1.
Complete audio room
correction-including
the correction of
both stereo equipment and room acoustics.
2.
Personalized sound quality control.
3. Creating an original tape collection of tapes tailored to your
car stereo, or tapes of
live recordings, etc.
4.
Reduction of noise, prevention of howling. These are merely
a few
of
the possibilities that sound quality and room acoustic
correction open up for the serious
listener.
•
Correcting
room
acoustics
Each room has its own particular effects on frequency character-
istics. These effects are determined by a number of conditions,
such as rooms size, furnishings, etc.
The 12 separate divisions of the band
level control on the
SH-8066 make it possible to selectively correct only the
frequency ranges necessary to suit the conditions of each
listening room .
An
example
of
room
acoustics
correction
In
order to correct the peaks and dips in bass sounds caused by
reflection, reduce the 250
Hz
level 4- 6
dB
and then, raise the
level of sounds below 63 Hz and above 4 kHz slightly.
"
+02
--------------
dB
-
30
-
25
- 20
_,
8-
• • •
-5
-
12
-o
25
40
63
100 160 250 500
lk
2k 4k 8k
16k
lull range
•
Cutting
the
noise
from
live
recording
tapes
Live tapes recorded outdoors generally contain popping noises
caused by wind and various other noises from the surrounding
area.
In
order to effectively eliminate wind noise, cut bass
sounds
below 63 Hz and raise the level of sounds
in
the 250
Hz- 500
Hz range. Then control sounds made by birds, etc
.,
with
a 4 kHz and
or
8 kHz adjustment.
dB
+
02
--------------
·-
·-
"
-
30
- 20
-•5
-
00
- 5
- 12 - 0
25
40
63
100 160
250
500
lk
2k
4k
8k
16k
tu
M range
• Making
tapes
for
car
stereos
Tapes can be made exc
lu
sively for the
li
stening conditions inside
a
vehicle. Merely raise the 63 Hz level 4 dB and completely cut
the
levels below 40 Hz that are so troublesome for car stereo
reproduction. For medium and
low frequencies, centering on the
250
Hz
vicinity, lower the modulating effect by raising the 4
kHz- 8 kHz vicinity by 2- 4 dB.
"
+02
------·------
dB
-
30
·-
- 25
- o
25
40
63
100 1M
2~
~
lk 2k 4k 8k
1~
fuP~nge
- 15 -
•
Cutting
noise
from
discs
Noises from warped discs are low frequency noise components.
Lowering the sound
level of the 63 Hz vicinity can eliminate
these.
To cut noise
in
old discs, set all direct-equalization level controls
to the " flat" (center) position, and then move them individually to
the
-12
dB position to find the noise component.
Then, working from this
clue, cut the noise so as not to
deteriorate the tone
quality.
dB
+02--------------
·-
·-
dB
-30
-25
-20
-0
25
40
63
100 160
250
500
lk..
2k
4k
Bk
16k
lu
i range
•
Reducing
tape
hiss
Tape hiss can be effectively reduced by slightly raising the level
of high frequency (above 2 kHz) sounds during tape deck
recording, and then lowering them during playback.
Note:
If sounds above 8 kHz are raised too much, distortion may result
in the tape deck. Prevent this by watching the level meters of the
tape deck and setting the recording
levels appropriately.
recording
playback
"
+02
·-
·-
"
+02
·-
·-
-
02
25
<0
25
<0
63
000
,.0
250
500
..
63
•oo
••o
250
500
..
,.
"
..
'"
=-
-
-
,.
"
..
.•.
lu
i
range
lui
range
"
-
30
-25
-20
-•5
-00
- o
"
-
30
-
20
_,
-
•o
- 5
- o
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