bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Июнь 24, 2024
Neural
activity
in
auditory
cortex
tracks
the
amplitude
envelope
of
continuous
speech,
but
recent
work
counter-intuitively
suggests
that
neural
tracking
increases
when
speech
is
masked
by
background
noise,
despite
reduced
intelligibility.
Noise-related
amplification
could
indicate
stochastic
resonance
-
response
facilitation
through
noise
supports
tracking.
However,
a
comprehensive
account
sensitivity
to
and
role
cognitive
investment
lacking.
In
five
electroencephalography
(EEG)
experiments
(N=109;
box
sexes),
current
study
demonstrates
generalized
enhancement
due
minimal
noise.
Results
show
a)
enhanced
for
at
very
high
SNRs
(~30
dB
SNR)
where
highly
intelligible;
b)
this
independent
attention;
c)
it
generalizes
across
different
stationary
maskers,
strongest
12-talker
babble;
d)
present
headphone
free-field
listening,
suggesting
neural-tracking
real-life
listening.
The
paints
clear
picture
enhances
representation
envelope,
contributes
further
highlights
non-linearities
induced
make
its
use
as
biological
marker
processing
challenging.
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Фев. 9, 2024
Abstract
Amplitude
compression
is
an
indispensable
feature
of
contemporary
audio
production
and
especially
relevant
in
modern
hearing
aids.
The
cortical
fate
amplitude-compressed
speech
signals
not
well-studied,
however,
may
yield
undesired
side
effects:
We
hypothesize
that
compressing
the
amplitude
envelope
continuous
reduces
neural
tracking.
Yet,
leveraging
such
a
‘compression
effect’
on
unwanted,
distracting
sounds
could
potentially
support
attentive
listening
if
effectively
reducing
their
In
this
study,
we
examined
24
young
normal-hearing
(NH)
individuals,
19
older
hearing-impaired
(HI)
12
individuals.
Participants
were
instructed
to
focus
one
two
competing
talkers
while
ignoring
other.
Envelope
(1:8
ratio,
loudness-matched)
was
applied
or
both
streams
containing
short
repeats.
Electroencephalography
(EEG)
allowed
us
quantify
response
function
degree
With
attended
target
stream,
HI
participants
showed
reduced
behavioural
accuracy,
compressed
yielded
generally
lowered
metrics
Importantly,
found
ignored
stream
resulted
stronger
representation
uncompressed
speech.
Our
results
imply
intelligent
algorithms,
with
variable
ratios
separated
sources,
help
individuals
loss
suppress
distraction
complex
multi-talker
environments.
Significant
statement
compression,
integral
aids,
poses
underexplored
challenge.
Compressing
hypothesized
diminish
capitalizing
’compression
for
might
enhance
listening.
Studying
(NH),
(HI),
normal
dual-talker
scenarios,
streams.
Both
NH
diminished
tracking
Despite
weaker
distractor,
exhibited
concurrent
target.
This
suggests
adaptive
employing
distinct
aid
suppressing
distractions
Preserved
communication
abilities
promote
healthy
aging.
To
this
end,
the
age-typical
loss
of
sensory
acuity
might
in
part
be
compensated
for
by
an
individual’s
preserved
attentional
neural
filtering.
Is
such
a
compensatory
brain–behaviour
link
longitudinally
stable?
Can
it
predict
individual
change
listening
behaviour?
We
here
show
that
behaviour
and
filtering
ability
follow
largely
independent
developmental
trajectories
modelling
electroencephalographic
behavioural
data
N
=
105
aging
individuals
(39–82
yrs).
First,
despite
expected
decline
hearing-
threshold–derived
acuity,
listening-task
performance
proved
stable
over
2
years.
Second,
were
correlated
only
within
each
separate
measurement
timepoint
(T1,
T2).
Longitudinally,
however,
our
results
raise
caution
on
attention-guided
metrics
as
predictors
behaviour:
Neither
at
T1
nor
its
two-year
could
change,
under
combination
strategies.
Zeitschrift für Neuropsychologie,
Год журнала:
2024,
Номер
35(1), С. 1 - 25
Опубликована: Фев. 23, 2024
Zusammenfassung:
Das
akustische
Sprachsignal
lässt
sich
nicht
eindeutig
in
einzelne
Wörter
unterteilen
und
ähnelt
eher
einem
kontinuierlichen
Lautstrom.
Dennoch
gibt
es
zeitliche
Regelmäßigkeiten,
die
möglicherweise
bei
der
Wahrnehmung
genutzt
werden.
Die
Dauer
von
Sprachelementen
wie
Phonemen,
Silben
prosodischen
Phrasen
spiegelt
Hirnaktivität
Sprachwahrnehmung
wider.
Trotzdem
ist
klar,
ob
tatsächlich
ein
kausaler
Zusammenhang
zwischen
neuronalen
Antwort
Qualität
besteht.
Der
vorliegende
Übersichtsartikel
präsentiert
einleitend
relevanten
Bestandteile
des
akustischen
Sprachsignals,
beschreibt
neuronale
auf
Sprachreize
im
Gehirn
zeigt
auf,
welche
neurophysiologischen
Veränderungen
mit
Sprachfunktionsstörungen
einhergehen.
Es
werden
verschiedene
Verfahren
nichtinvasiven
Neuromodulation
vorgestellt
erste
Ergebnisse
präsentiert,
darauf
hindeuten,
dass
durch
gezielte
Sprachfunktionen
verbessern
lassen
können.
Preserved
communication
abilities
promote
healthy
ageing.
To
this
end,
the
age-typical
loss
of
sensory
acuity
might
in
part
be
compensated
for
by
an
individual’s
preserved
attentional
neural
filtering.
Is
such
a
compensatory
brain–behaviour
link
longitudinally
stable?
Can
it
predict
individual
change
listening
behaviour?
We
here
show
that
behaviour
and
filtering
ability
follow
largely
independent
developmental
trajectories
modelling
electroencephalographic
behavioural
data
N
=
105
ageing
individuals
(39–82
y).
First,
despite
expected
decline
hearing-threshold-derived
acuity,
listening-task
performance
proved
stable
over
2
y.
Second,
were
correlated
only
within
each
separate
measurement
timepoint
(T1,
T2).
Longitudinally,
however,
our
results
raise
caution
on
attention-guided
metrics
as
predictors
behaviour:
neither
at
T1
nor
its
2-year
could
change,
under
combination
strategies.
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Июнь 24, 2024
Neural
activity
in
auditory
cortex
tracks
the
amplitude
envelope
of
continuous
speech,
but
recent
work
counter-intuitively
suggests
that
neural
tracking
increases
when
speech
is
masked
by
background
noise,
despite
reduced
intelligibility.
Noise-related
amplification
could
indicate
stochastic
resonance
-
response
facilitation
through
noise
supports
tracking.
However,
a
comprehensive
account
sensitivity
to
and
role
cognitive
investment
lacking.
In
five
electroencephalography
(EEG)
experiments
(N=109;
box
sexes),
current
study
demonstrates
generalized
enhancement
due
minimal
noise.
Results
show
a)
enhanced
for
at
very
high
SNRs
(~30
dB
SNR)
where
highly
intelligible;
b)
this
independent
attention;
c)
it
generalizes
across
different
stationary
maskers,
strongest
12-talker
babble;
d)
present
headphone
free-field
listening,
suggesting
neural-tracking
real-life
listening.
The
paints
clear
picture
enhances
representation
envelope,
contributes
further
highlights
non-linearities
induced
make
its
use
as
biological
marker
processing
challenging.