Remote microphone hearing aid systems assist children with autism spectrum disorder

This article is one among a growing body of research showing the benefits of auditory training and remote microphone hearing aid systems for children and adolescents with ASD.

Schafer, E. C., Wright, S., Anderson, C., Jones, J., Pitts, K., Bryant, D., … & Reed, M. P. (2016). Assistive technology evaluations: Remote-microphone technology for children with Autism Spectrum Disorder. Journal of communication disorders, 64, 1-17.

https://www.sciencedirect.com/science/article/abs/pii/S0021992416301009

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Children diagnosed with auditory processing disorder and their parents: a qualitative study about perceptions of living with APD

The aim of this study by Sarah Lawton, speech-language therapist at SoundSkills APD Clinic, was to explore the emotional and psychological consequences of living with APD as perceived by children with the disorder and their parents.

Lawton, S., Purdy, S. C., & Kalathottukaren, R. T. (2017). Children diagnosed with auditory processing disorder and their parents: a qualitative study about perceptions of living with APD. Journal of the American Academy of Audiology, 28(7), 610-624.

Background: Negative psychosocial consequences have been reported for children with auditory processing disorder (APD). The current literature surrounding APD does not sufficiently address the emotional and psychological consequences of living with the disorder. It is recommended that data be collected from multiple sources, including the child living with APD. Subjective reports of the perceptions of children with APD and their families have real-life validity and can inform clinical decisions and guide future research.

Purpose: The aims of this study were to explore the psychosocial consequences of APD as perceived by children with the disorder and their parents.
Research Design: Qualitative cross-sectional study.
Study Sample: Thirteen participants were interviewed: six children with APD, aged 10–12 yr, and one parent for each child (in one case, two parents participated in the interview).
Data Collection and Analysis: Semi structured interviews were used to examine the social, emotional, and educational well-being of children with APD. Inductive thematic analysis was conducted to develop themes that illustrated the experiences of living with APD.

Results: Three themes were identified forming a causal network conceptual framework that is reciprocal in nature: (1) external factors, (2) internal problems, and (3) coping. The themes revealed how APD impacted negatively on children’s psychosocial well-being (internal problems: covert thoughts, overt behaviors) and described the basis for these outcomes (external factors: environmentally based problems, dissatisfaction with support) and the ability of children and their parent(s) to manage the impact of APD (coping: positive, negative).

Conclusions: The three themes identified in this research provide a novel understanding of the experience of APD. The themes reflect the psychosocial consequences of external factors that are created internally through ‘‘thought’’ and expressed externally through ‘‘behaviour.’’ Pathways to support positive coping strategies while discouraging negative coping strategies will enable children to overcome problems and improve their psychosocial well-being.

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A European perspective on auditory processing disorder – current knowledge and future research focus

This consensus statement on auditory processing disorder (APD) by experts on APD from 17 European countries was led by Professors Vivian Iliadou (Greece) and Doris Eva-Bamiou (UK).

Iliadou, V. V., Ptok, M., Grech, H., Pedersen, E. R., Brechmann, A., Deggouj, N., … & Veuillet, E. (2017). A European perspective on auditory processing disorder-current knowledge and future research focus. Frontiers in neurology, 8, 622.

Current notions of “hearing impairment,” as reflected in clinical audiological practice, do not acknowledge the needs of individuals who have normal hearing pure tone sensitivity but who experience auditory processing difficulties in everyday life that are indexed by reduced performance in other more sophisticated audiometric tests such as speech audiometry in noise or complex non-speech sound perception. This disorder, defined as “Auditory Processing Disorder” (APD) or “Central Auditory Processing Disorder” is classified in the current tenth version of the International Classification of diseases as H93.25 and in the forthcoming beta eleventh version. APDs may have detrimental effects on the affected individual, with low esteem, anxiety, and depression, and symptoms may remain into adulthood. These disorders may interfere with learning per se and with communication, social, emotional, and academic-work aspects of life. The objective of the present paper is to define a baseline European APD consensus formulated by experienced clinicians and researchers in this specific field of human auditory science. A secondary aim is to identify issues that future research needs to address in order to further clarify the nature of APD and thus assist in optimum diagnosis and evidence-based management. This European consensus presents the main symptoms, conditions, and specific medical history elements that should lead to auditory processing evaluation. Consensus on definition of the disorder, optimum diagnostic pathway, and appropriate management are highlighted alongside a perspective on future research focus.

Read the full article here

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Remote microphone hearing aid systems drive beneficial neuroplastic change in the auditory systems of children with dyslexia and associated auditory processing weaknesses

This study provides strong evidence of beneficial neuroplastic change, measured through improvements in the electrophysiological responses of the brain to speech sounds, in children with auditory processing deficits, as a result of use of mild amplification with remote microphone hearing aid systems.

Hornickel, J., Zecker, S. G., Bradlow, A. R., & Kraus, N. (2012). Assistive listening devices drive neuroplasticity in children with dyslexia. Proceedings of the National Academy of Sciences, 109(41), 16731-16736.

https://www.pnas.org/content/109/41/16731.short

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“Hidden hearing loss” is more likely due to APD than cochlear synaptopathy

Hearing loss due to abnormality of neural connections between the inner ear (cochlea) and, or in, the auditory nerve has been dubbed “hidden hearing loss” and is the subject of considerable recent research. Like APD, it is not detected by basic hearing tests. However APD is a far more prevalent condition than cochlear synaptopathy.

Musiek, F. E., Chermak, G. D., Bamiou, D. E., & Shinn, J. (2018). CAPD: The Most Common ‘Hidden Hearing Loss’ Central auditory processing disorder—and not cochlear synaptopathy—is the most likely source of difficulty understanding speech in noise (despite normal audiograms). The ASHA Leader, 23(3), 6-9.

Read the full article at the link below.

https://leader.pubs.asha.org/doi/full/10.1044/leader.FMP.23032018.6

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Terminology for Auditory Processing Deficits and Difficulties

Disability terminology: Are we listening?

This opinion article published by Hearing Health Matters contributes to current discussion on terminology to describe various types and degrees of auditory processing disorder. It points out that one of the terms being strongly promoted may not be acceptable to people with a hearing disability who, under our CRPD (Convention on the Rights of Persons with Disabilities) obligations should be involved in the discussion.

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Impairment of speaking rate perception in children with dyslexia

This study identifies a new type of temporal perception deficit in children with dyslexia; speaking rate perception.

There is considerable evidence suggesting auditory processing deficits may be a major contributor to dyslexia. Impaired perception of subtle components of speech sounds (phonemes) impairs phonological awareness which is thought to be a key underlying cause of dyslexia. Various temporal (timing) perception deficits in particular have been shown to be associated with dyslexia. These deficits are also common in children with APD. This study identifies a new type of temporal perception deficit in children with dyslexia; speaking rate perception. Appreciating speaking rate assists us to categorise the relative length of sounds. Some speech sounds, usually vowels, will be longer in a slow speaker than a fast speaker. Our brain normally allows for this in determining whether a speech sound is relatively short or long. This study shows that children with dyslexia are less able to compensate for speaking rate when trying to understand spoken speech. The authors conclude:

“Individuals with developmental dyslexia (DD) are impaired not only in tasks involving direct temporal processing, as shown in previous studies but also in the use of temporal information of a context that impacts the perception of subsequent target words. This inability to fully utilize rate normalization processes may influence the formation of abstract phonological representations in individuals with DD.”

Gabay, Y., Najjar, I. J., & Reinisch, E. (2019). Another Temporal Processing Deficit in Individuals With Developmental Dyslexia: The Case of Normalization for Speaking Rate. Journal of Speech, Language, and Hearing Research, 62(7), 2171-2184.

https://pubs.asha.org/doi/full/10.1044/2019_JSLHR-S-18-0264

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Auditory Training Effects on the Listening Skills of Children with Auditory Processing Disorder

Broad speech-based auditory training leads to improvement in functional hearing in children with APD.

Loo, J. H. Y., Rosen, S., & Bamiou, D. E. (2016). Auditory training effects on the listening skills of children with auditory processing disorder. Ear and hearing, 37(1), 38-47.

The authors examined, in a group of children with APD, whether a 12-week computer-based auditory training program with speech material improved the perception of speech-in-noise test performance, and functional listening skills as assessed by parental and teacher listening and communication questionnaires. … Broad speech-based auditory training led to improved auditory processing skills as reflected in speech-in-noise test performance and in better functional listening in real life. The observed correlation between improved functional listening with improved speech-in-noise perception in the trained group suggests that improved listening was a direct generalization of the auditory training.

https://www.ingentaconnect.com/content/wk/aud/2016/00000037/00000001/art00009

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Are Specific Language Impairment and APD distinguishable?

Specific language impairment (SLI) and APD appear intertwined, with the suggestion that differential diagnosis may be influenced by whether a child is assessed by an audiologist or speech-language therapist. Multi-disciplinary assessment (as occurs at SoundSkills) is advisable.

Ferguson, M. A., Hall, R. L., Riley, A., & Moore, D. R. (2011). Communication, listening, cognitive and speech perception skills in children with auditory processing disorder (APD) or specific language impairment (SLI). Journal of Speech, Language, and Hearing Research.

https://pubs.asha.org/doi/abs/10.1044/1092-4388%282010/09-0167%29

Miller, C. A., & Wagstaff, D. A. (2011). Behavioral profiles associated with auditory processing disorder and specific language impairment. Journal of communication disorders, 44(6), 745-763.

https://www.sciencedirect.com/science/article/abs/pii/S0021992411000232

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Evidence of differences in electrophysiological recordings from the brain to sound in children with APD

Electrophysiological recordings of responses to sound in children with APD show differences at brainstem and cortical levels of the brain.

Mattsson, T. S., Lind, O., Follestad, T., Grøndahl, K., Wilson, W., Nicholas, J., … & Andersson, S. (2019). Electrophysiological characteristics in children with listening difficulties, with or without auditory processing disorder. International journal of audiology, 58(11), 704-716.

https://www.tandfonline.com/doi/abs/10.1080/14992027.2019.1621396

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