<s>
Delayed	B-Architecture
Auditory	I-Architecture
Feedback	I-Architecture
(	O
DAF	O
)	O
,	O
also	O
called	O
delayed	O
sidetone	O
,	O
is	O
a	O
type	O
of	O
altered	O
auditory	O
feedback	O
that	O
consists	O
of	O
extending	O
the	O
time	O
between	O
speech	O
and	O
auditory	O
perception	O
.	O
</s>
<s>
It	O
can	O
consist	O
of	O
a	O
device	O
that	O
enables	O
a	O
user	O
to	O
speak	O
into	O
a	O
microphone	B-Application
and	O
then	O
hear	O
their	O
voice	O
in	O
headphones	B-Device
a	O
fraction	O
of	O
a	O
second	O
later	O
.	O
</s>
<s>
Some	O
DAF	O
devices	O
are	O
hardware	O
;	O
DAF	O
computer	B-Application
software	I-Application
is	O
also	O
available	O
.	O
</s>
<s>
Delayed	B-Architecture
auditory	I-Architecture
feedback	I-Architecture
devices	O
are	O
used	O
in	O
speech	O
perception	O
experiments	O
in	O
order	O
to	O
demonstrate	O
the	O
importance	O
of	O
auditory	O
feedback	O
in	O
speech	O
perception	O
as	O
well	O
as	O
in	O
speech	O
production	O
.	O
</s>
<s>
Electronic	B-Application
fluency	I-Application
devices	I-Application
use	O
delayed	B-Architecture
auditory	I-Architecture
feedback	I-Architecture
and	O
have	O
been	O
used	O
as	O
a	O
technique	O
to	O
aid	O
with	O
stuttering	O
.	O
</s>
<s>
Indirect	O
effects	O
of	O
delayed	B-Architecture
auditory	I-Architecture
feedback	I-Architecture
in	O
people	O
who	O
do	O
not	O
stutter	O
include	O
a	O
reduction	O
in	O
the	O
rate	O
of	O
speech	O
,	O
an	O
increase	O
in	O
intensity	O
,	O
and	O
an	O
increase	O
in	O
fundamental	O
frequency	O
that	O
occur	O
to	O
overcome	O
the	O
effects	O
of	O
the	O
feedback	O
.	O
</s>
<s>
In	O
delayed	B-Architecture
auditory	I-Architecture
feedback	I-Architecture
,	O
the	O
delay	O
is	O
artificially	O
disrupted	O
.	O
</s>
<s>
Continuous	O
delayed	B-Architecture
auditory	I-Architecture
feedback	I-Architecture
in	O
zebra	O
finch	O
songbirds	O
caused	O
them	O
to	O
change	O
their	O
song	O
syllable	O
timing	O
,	O
indicating	O
that	O
DAF	O
can	O
change	O
the	O
motor	O
program	O
of	O
syllable	O
timing	O
generation	O
during	O
short	O
periods	O
of	O
time	O
in	O
zebra	O
finches	O
,	O
similar	O
to	O
the	O
effects	O
observed	O
in	O
humans	O
.	O
</s>
