<s>
A	O
soundbar	B-Device
,	O
sound	B-Device
bar	I-Device
or	O
media	B-Device
bar	I-Device
is	O
a	O
type	O
of	O
loudspeaker	O
that	O
projects	O
audio	O
from	O
a	O
wide	O
enclosure	B-Device
.	O
</s>
<s>
It	O
is	O
much	O
wider	O
than	O
it	O
is	O
tall	O
,	O
partly	O
for	O
acoustic	O
reasons	O
,	O
and	O
partly	O
so	O
it	O
can	O
be	O
mounted	O
above	O
or	O
below	O
a	O
display	B-Device
device	I-Device
(	O
e.g.	O
</s>
<s>
above	O
a	O
computer	B-Device
monitor	I-Device
or	O
under	O
a	O
home	O
theater	O
or	O
television	B-Device
screen	I-Device
)	O
.	O
</s>
<s>
In	O
a	O
soundbar	B-Device
,	O
multiple	O
speakers	O
are	O
placed	O
in	O
a	O
single	O
cabinet	B-Device
,	O
which	O
helps	O
to	O
create	O
stereo	O
sound	O
or	O
a	O
surround-sound	O
effect	O
.	O
</s>
<s>
A	O
separate	O
subwoofer	B-Application
is	O
typically	O
included	O
with	O
,	O
or	O
may	O
be	O
used	O
to	O
supplement	O
,	O
a	O
soundbar	B-Device
.	O
</s>
<s>
Early	O
passive	O
versions	O
simply	O
integrated	O
left	O
,	O
centre	O
and	O
right	O
speakers	O
into	O
one	O
enclosure	B-Device
,	O
sometimes	O
called	O
an	O
"	O
LCR	O
soundbar	B-Device
"	O
.	O
</s>
<s>
Altec	O
Lansing	O
introduced	O
a	O
multichannel	O
soundbar	B-Device
in	O
1998	O
called	O
the	O
Voice	O
Of	O
The	O
Digital	O
Theatre	O
or	O
the	O
ADA106	O
.	O
</s>
<s>
It	O
was	O
a	O
powered	O
speaker	O
system	O
that	O
offered	O
stereo	O
,	O
Dolby	O
Pro-Logic	O
and	O
AC3	O
surround	O
sound	O
from	O
the	O
soundbar	B-Device
and	O
a	O
separate	O
subwoofer	B-Application
.	O
</s>
<s>
The	O
soundbar	B-Device
housed	O
four	O
3″	O
full	O
range	O
drivers	O
and	O
two	O
1″	O
tweeters	O
while	O
the	O
subwoofer	B-Application
housed	O
one	O
8″	O
dual	O
voice	O
coil	O
driver	O
.	O
</s>
<s>
Soundbars	B-Device
are	O
relatively	O
small	O
and	O
can	O
be	O
easily	O
positioned	O
under	O
a	O
display	O
,	O
are	O
easy	O
to	O
set	O
up	O
,	O
and	O
are	O
usually	O
less	O
expensive	O
than	O
other	O
stereo	O
sound	O
systems	O
.	O
</s>
<s>
However	O
,	O
because	O
of	O
their	O
smaller	O
size	O
and	O
lack	O
of	O
flexibility	O
in	O
positioning	O
,	O
soundbars	B-Device
do	O
not	O
fill	O
a	O
room	O
with	O
sound	O
as	O
well	O
as	O
separate-speaker	O
stereo	O
systems	O
do	O
.	O
</s>
<s>
To	O
take	O
advantages	O
both	O
from	O
soundbar	B-Device
and	O
stereo	O
set	O
system	O
,	O
some	O
manufacturers	O
produce	O
soundbar	B-Device
hybrids	O
in	O
which	O
the	O
soundbar	B-Device
represents	O
left	O
,	O
center	O
,	O
and	O
right	O
speakers	O
plus	O
(	O
wireless	O
)	O
subwoofer	B-Application
and	O
rear-left	O
and	O
rear-right	O
speakers	O
.	O
</s>
<s>
Sometimes	O
producers	O
make	O
soundbars	B-Device
with	O
left	O
,	O
center	O
,	O
and	O
right	O
speakers	O
plus	O
detachable	O
charge	O
rear-left	O
and	O
rear-right	O
speakers	O
.	O
</s>
<s>
With	O
the	O
increasing	O
availability	O
of	O
Dolby	O
Atmos	O
content	O
since	O
2021	O
,	O
it	O
has	O
become	O
increasingly	O
important	O
for	O
soundbars	B-Device
to	O
produce	O
height	O
effects	O
.	O
</s>
<s>
To	O
deliver	O
a	O
realistic	O
sense	O
of	O
height	O
from	O
a	O
soundbar	B-Device
hybrid	O
system	O
,	O
audio	O
specialized	O
companies	O
such	O
as	O
Nakamichi	O
have	O
developed	O
proprietary	O
upmixing	O
algorithms	O
,	O
using	O
a	O
combination	O
of	O
spatial-amplification	O
,	O
phase	O
improvements	O
,	O
and	O
height	O
effect	O
sound	O
layer	O
interlacing	O
to	O
deliver	O
realistic	O
vertical	O
effects	O
.	O
</s>
<s>
Another	O
method	O
that	O
soundbars	B-Device
may	O
employ	O
to	O
deliver	O
height	O
effects	O
is	O
through	O
the	O
use	O
of	O
up-firing	O
speakers	O
,	O
which	O
rely	O
heavily	O
on	O
the	O
ceiling	O
of	O
the	O
room	O
to	O
bounce	O
height	O
effects	O
off	O
the	O
ceiling	O
,	O
towards	O
the	O
listener	O
.	O
</s>
<s>
Soundbars	B-Device
were	O
primarily	O
designed	O
to	O
generate	O
strong	O
sound	O
with	O
good	O
bass	O
response	O
.	O
</s>
<s>
Soundbar	B-Device
usage	O
has	O
increased	O
steadily	O
as	O
the	O
world	O
has	O
moved	O
to	O
flat-screen	O
displays	O
.	O
</s>
<s>
Soundbars	B-Device
help	O
to	O
bridge	O
this	O
gap	O
.	O
</s>
