.
connects to any oudio,
Video,
TV
Set,
or PC
with
a headphones or
line
output;
0
provides
perfett
Sound
reproduction,
full
mobility,
and
Signal
transmission
through
Walls
and
ceilings
over a
distance
of
up
ta
330 feet (100 m);
.
uses proprietary IVA
technology
for exceptionally
realistic,
threedimensional
listening;
l features an
integrated
Dolby Surround Pro
togic
decoder
for
perfett
reproduction of
hi-ft,
TV, PC, or
Video
Sound
in
Dolby
surround format;
.
provides an analog
line
output for connecting an external headphones amplifer for hardwire headphones.
The Hearo 777
System
is
available for three different
LPD
frequency bands: 9 14 MHz for the US, 434 MHz and 864 MHz for
vorious
European
countries (434 MHz
version
shown on the
cover).
The Hearo 777
System
lets
you share your listening
enjoyment
with
other persons. You
tan
operate your
transmitter
with several
head-
phones
simultaneously. Make
Sure
to
use wireless headphones operating in the same
UHF
frequency band
as
the Hearo 777,
e-g.,
K
355
UHF
or
K
455
UHF
from AKG.
3.2
IVA
-
Individual
Virtual
Acoustics
One drowback of headphone
listening
is
the psychoocoustic phenomenon of.“inside localization”: the
orchestra
seems
to
play
inside
your
head
rather than in the
room.AKG
developed o
binaurol
audio processing
technique
called
IVA
(Individual
Virtual
Acoustics) that
models the woy the
head
and
pinnae
Change
the arriving
Sound
waves
(ear
motching
function).
Thus, the various
Sound
sources
will
seem to be located
outside
your
head
even when you ore
using
headphones.
A:
Notural
hearing: Due to the
effect
of the
head
and pinnoe,
Sound
waves arriving at one ear
differ from those arriving at the other. Amplitude and phose differentes
creote
a sense of
spa-
tiol
heoring.
B:
Listeneng
through headphones. Amplitude ond
Phase
differentes
are
eliminoted.
Sound
sour-
ces are
locolized
inside
the
head
rother thon in the room.
tistenrng
through heodphones
with
IVA processing: The eor
motching
function
modifies the
oudio
Signals
at the eors
to
resemble diagram
A.
This
restores
naturol,
spatrol
heoring.
3.3
Dolby
Surround
Pro
logic
Decoder
T%
Dolby Surround Pro
Logic
decsder
integroted
in the tronsmitter
uses
the stereo
input
signoi
to
derive
two
odditional Signals, o
cen’er
and o surround
channel
?he
IVP
clrcuitry
generotes from these
Signals
c
brnaurol
signol
equivalent
to reproduction through
fiie
high
quolity
Ioudspeokers
(3 front
2
reor speokers).
This
ollows
you to
enjov
all
the
benefirs
of Dolby surround
Sound
even through
heaconones
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