Technics SH-8055

i PINK NOISE
ePink noise is used for measurement and correction of the
sound field frequency response because it is mostly within the
audible range, its energy distribution is uniform, and it has a
the
Response of white noise
oB
(oso
Response of filter
wide frequency band. oy
Because pink noise has large instantaneous level fluctuations, —3dB/oct
display
may
fluctuate.
aes
<Frequency response of pink noise> 3dB/oct
—> 1 —> |
98 1 Response of pink noise
a a 7
Frequency (Hz)
Mi HOW TO USE THE REAL-TIME SPECTRUM ANALYZER
@
With
the
sound
volume
of
amplifier
set
at
minimum,
the
frequency
characteristics
of
sound
sources
such
as
human
voice,
live
music
and
noise
can
be
measured
(displayed
on
spectrum
analyzer)
through
operations
in
numerical
order
as
shown
below.
@
As
the
sound
volume
of
amplifier
is
increased
through
operations
as
shown
below,
the
sound
volume
of
pink
noise
increases,
and then the sound field frequency characteristics can be measured (displayed on spectrum analyzer).
—)
Speaker
Speaker
®
Adjust
the
system
system
volume
to
an
(Left)
(Right)
appropriate
level.
Volume control: “0”
Balance control: “center position”
Excessively
raising
the
amplifier
©
Tone
controls:
O/elt
Ps
aatan|
i
ee
aéidlh
mode
selector
volume
or
the
band
level
controls
of
this
“center
position”
at
‘ie
it
ea
Sion
a
unit
during
measurement
or
correction
input
Suleclor
anak
“tape”
i ici oitetaien yt
aedaroy
er
ete
sa
shasiste
elf
the
amplifier
has
a
tape-monitor
selector
and
the
sound
will
approach
the
limits
of
the
-
input
isan
eat
audible range and be difficult to hear, det cael ee P
thus increasing the likelihood of a be on” (Ma)
mistaken assumption that there is no =
output. i
Recommended
microphone:
RP-3800E
(sold
separately)
©
“on”
(M.
=)
“off?
© “0dB” (mB)
Set
the
switch
on
the
microphone
to
(Change
it
over
according
to
the
“on. sensitivity of microphone.)
(Position
the
microphone
at
the
place
and
Select
the
channel
for
sound
field
measurement
by
height
at
which
you
usually
listen
to
your
setting
to
“on”
(M_
=).
audio equipment.)
@® Adjust the display so that it is easy to see (approximately
the 20-dB level).
(The display at this time shows the sound field frequency
response.)
—