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Training changes processing of speech cues in older adults with hearing loss.

Anderson S, White-Schwoch T, Choi HJ, Kraus N - Front Syst Neurosci (2013)

Bottom Line: Aging results in a loss of sensory function, and the effects of hearing impairment can be especially devastating due to reduced communication ability.Importantly, changes in speech processing were accompanied by improvements in speech perception.Thus, central processing deficits associated with hearing loss may be partially remediated with training, resulting in real-life benefits for everyday communication.

View Article: PubMed Central - PubMed

Affiliation: Auditory Neuroscience Laboratory, Department of Communication Sciences and Disorders, Northwestern University Evanston, IL, USA ; Department of Communication Sciences, Northwestern University Evanston, IL, USA.

ABSTRACT
Aging results in a loss of sensory function, and the effects of hearing impairment can be especially devastating due to reduced communication ability. Older adults with hearing loss report that speech, especially in noisy backgrounds, is uncomfortably loud yet unclear. Hearing loss results in an unbalanced neural representation of speech: the slowly-varying envelope is enhanced, dominating representation in the auditory pathway and perceptual salience at the cost of the rapidly-varying fine structure. We hypothesized that older adults with hearing loss can be trained to compensate for these changes in central auditory processing through directed attention to behaviorally-relevant speech sounds. To that end, we evaluated the effects of auditory-cognitive training in older adults (ages 55-79) with normal hearing and hearing loss. After training, the auditory training group with hearing loss experienced a reduction in the neural representation of the speech envelope presented in noise, approaching levels observed in normal hearing older adults. No changes were noted in the control group. Importantly, changes in speech processing were accompanied by improvements in speech perception. Thus, central processing deficits associated with hearing loss may be partially remediated with training, resulting in real-life benefits for everyday communication.

No MeSH data available.


Related in: MedlinePlus

Mean F0ADD and H2ADD amplitudes are displayed for individual pre- (open circles) and post-data (closed circles) for the auditory training (red) and active control (blue) groups. Visual observation of the data reveals that there is greater pre-training variability in both groups with hearing loss and in the degree of change in the auditory training group with hearing loss.
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Figure 6: Mean F0ADD and H2ADD amplitudes are displayed for individual pre- (open circles) and post-data (closed circles) for the auditory training (red) and active control (blue) groups. Visual observation of the data reveals that there is greater pre-training variability in both groups with hearing loss and in the degree of change in the auditory training group with hearing loss.

Mentions: In the group with hearing loss, we found a training group × test session interaction [F(1, 30) = 4.351, p = 0.023], with a significant reduction in envelope encoding (F0ADD to H2ADD) occurring within the auditory training group [F(1, 14) = 3.843, p = 0.049] but not the active control group [F(1, 14) = 0.381, p = 0.691] (see Figures 4A,B). We also analyzed the pre and post data of the groups with normal hearing and found no training group × test session interaction [F(1, 27) = 0.803, p = 0.459] and no changes in either group (all p's > 0.1) (see Figures 4C,D). Although there was no training group × hearing group × test session interaction [F(1, 57) = 2.239, p = 0.117], there was a hearing group × test session interaction in the auditory training group [F(1, 29) = 3.573, p = 0.043] that was not present in the active control group [F(1, 29) = 0.136, p = 0.874] (see Figures 4E,F), suggesting that the auditory training effect was specific to the participants with hearing loss. Representation of the TFS (H3SUB–H6SUB) did not change for either hearing impaired or normal hearing participants of either training group (all p's > 0.1) (Figure 5). Figures 6, 7 display mean F0ADD and H2ADD and mean H3SUB–H6SUB amplitudes, respectively, for individual participants. It is evident from these figures that individuals with hearing loss have greater variability than individuals with normal hearing.


Training changes processing of speech cues in older adults with hearing loss.

Anderson S, White-Schwoch T, Choi HJ, Kraus N - Front Syst Neurosci (2013)

Mean F0ADD and H2ADD amplitudes are displayed for individual pre- (open circles) and post-data (closed circles) for the auditory training (red) and active control (blue) groups. Visual observation of the data reveals that there is greater pre-training variability in both groups with hearing loss and in the degree of change in the auditory training group with hearing loss.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3842592&req=5

Figure 6: Mean F0ADD and H2ADD amplitudes are displayed for individual pre- (open circles) and post-data (closed circles) for the auditory training (red) and active control (blue) groups. Visual observation of the data reveals that there is greater pre-training variability in both groups with hearing loss and in the degree of change in the auditory training group with hearing loss.
Mentions: In the group with hearing loss, we found a training group × test session interaction [F(1, 30) = 4.351, p = 0.023], with a significant reduction in envelope encoding (F0ADD to H2ADD) occurring within the auditory training group [F(1, 14) = 3.843, p = 0.049] but not the active control group [F(1, 14) = 0.381, p = 0.691] (see Figures 4A,B). We also analyzed the pre and post data of the groups with normal hearing and found no training group × test session interaction [F(1, 27) = 0.803, p = 0.459] and no changes in either group (all p's > 0.1) (see Figures 4C,D). Although there was no training group × hearing group × test session interaction [F(1, 57) = 2.239, p = 0.117], there was a hearing group × test session interaction in the auditory training group [F(1, 29) = 3.573, p = 0.043] that was not present in the active control group [F(1, 29) = 0.136, p = 0.874] (see Figures 4E,F), suggesting that the auditory training effect was specific to the participants with hearing loss. Representation of the TFS (H3SUB–H6SUB) did not change for either hearing impaired or normal hearing participants of either training group (all p's > 0.1) (Figure 5). Figures 6, 7 display mean F0ADD and H2ADD and mean H3SUB–H6SUB amplitudes, respectively, for individual participants. It is evident from these figures that individuals with hearing loss have greater variability than individuals with normal hearing.

Bottom Line: Aging results in a loss of sensory function, and the effects of hearing impairment can be especially devastating due to reduced communication ability.Importantly, changes in speech processing were accompanied by improvements in speech perception.Thus, central processing deficits associated with hearing loss may be partially remediated with training, resulting in real-life benefits for everyday communication.

View Article: PubMed Central - PubMed

Affiliation: Auditory Neuroscience Laboratory, Department of Communication Sciences and Disorders, Northwestern University Evanston, IL, USA ; Department of Communication Sciences, Northwestern University Evanston, IL, USA.

ABSTRACT
Aging results in a loss of sensory function, and the effects of hearing impairment can be especially devastating due to reduced communication ability. Older adults with hearing loss report that speech, especially in noisy backgrounds, is uncomfortably loud yet unclear. Hearing loss results in an unbalanced neural representation of speech: the slowly-varying envelope is enhanced, dominating representation in the auditory pathway and perceptual salience at the cost of the rapidly-varying fine structure. We hypothesized that older adults with hearing loss can be trained to compensate for these changes in central auditory processing through directed attention to behaviorally-relevant speech sounds. To that end, we evaluated the effects of auditory-cognitive training in older adults (ages 55-79) with normal hearing and hearing loss. After training, the auditory training group with hearing loss experienced a reduction in the neural representation of the speech envelope presented in noise, approaching levels observed in normal hearing older adults. No changes were noted in the control group. Importantly, changes in speech processing were accompanied by improvements in speech perception. Thus, central processing deficits associated with hearing loss may be partially remediated with training, resulting in real-life benefits for everyday communication.

No MeSH data available.


Related in: MedlinePlus