Trends in AmplificationPub Date : 2009-09-01Epub Date: 2009-08-26DOI: 10.1177/1084713809346160
Susan Nittrouer, Christopher Chapman
{"title":"The effects of bilateral electric and bimodal electric--acoustic stimulation on language development.","authors":"Susan Nittrouer, Christopher Chapman","doi":"10.1177/1084713809346160","DOIUrl":"https://doi.org/10.1177/1084713809346160","url":null,"abstract":"<p><p>There is no doubt that cochlear implants have improved the spoken language abilities of children with hearing loss, but delays persist. Consequently, it is imperative that new treatment options be explored. This study evaluated one aspect of treatment that might be modified, that having to do with bilateral implants and bimodal stimulation. A total of 58 children with at least one implant were tested at 42 months of age on four language measures spanning a continuum from basic to generative in nature. When children were grouped by the kind of stimulation they had at 42 months (one implant, bilateral implants, or bimodal stimulation), no differences across groups were observed. This was true even when groups were constrained to only children who had at least 12 months to acclimatize to their stimulation configuration. However, when children were grouped according to whether or not they had spent any time with bimodal stimulation (either consistently since their first implant or as an interlude to receiving a second) advantages were found for children who had some bimodal experience, but those advantages were restricted to language abilities that are generative in nature. Thus, previously reported benefits of simultaneous bilateral implantation early in a child's life may not extend to generative language. In fact, children may benefit from a period of bimodal stimulation early in childhood because low-frequency speech signals provide prosody and serve as an aid in learning how to perceptually organize the signal that is received through a cochlear implant.</p>","PeriodicalId":48972,"journal":{"name":"Trends in Amplification","volume":"13 3","pages":"190-205"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1084713809346160","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28369329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
David S Haynes, Jadrien A Young, George B Wanna, Michael E Glasscock
{"title":"Middle ear implantable hearing devices: an overview.","authors":"David S Haynes, Jadrien A Young, George B Wanna, Michael E Glasscock","doi":"10.1177/1084713809346262","DOIUrl":"https://doi.org/10.1177/1084713809346262","url":null,"abstract":"<p><p>Hearing loss affects approximately 30 million people in the United States. It has been estimated that only approximately 20% of people with hearing loss significant enough to warrant amplification actually seek assistance for amplification. A significant interest in middle ear implants has emerged over the years to facilitate patients who are noncompliant with conventional hearing aides, do not receive significant benefit from conventional aides, or are not candidates for cochlear implants. From the initial studies in the 1930s, the technology has greatly evolved over the years with a wide array of devices and mechanisms employed in the development of implantable middle ear hearing devices. Currently, these devices are generally available in two broad categories: partially or totally implantable using either piezoelectric or electromagnetic systems. The authors present an up-to-date overview of the major implantable middle ear devices. Although the current devices are largely in their infancy, indications for middle ear implants are ever evolving as promising studies show good results. The totally implantable devices provide the user freedom from the social and practical difficulties of using conventional amplification.</p>","PeriodicalId":48972,"journal":{"name":"Trends in Amplification","volume":"13 3","pages":"206-14"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1084713809346262","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28408738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Frequency-lowering devices for managing high-frequency hearing loss: a review.","authors":"Andrea Simpson","doi":"10.1177/1084713809336421","DOIUrl":"10.1177/1084713809336421","url":null,"abstract":"<p><p>Frequency-lowering technology has been around for decades. The primary aim--namely, that of providing high-frequency information to those with severe high-frequency hearing loss--addresses a clinical need most conventional hearing devices are still unable to provide. Early studies with frequency-lowering technology reported mostly unfavorable results, and the devices never gained clinical popularity. However, as hearing aid (HA) technology becomes ever more sophisticated, it is appropriate to reconsider whether frequency-lowering HAs should be an amplification choice in those with high-frequency hearing loss. Recent research is yielding promise with people who wear frequency-lowering devices showing improved speech perception. Questions remain regarding patient candidacy and whether auditory training may result in better outcomes. The author also discusses future clinical directions and research needs for frequency lowering.</p>","PeriodicalId":48972,"journal":{"name":"Trends in Amplification","volume":"13 2","pages":"87-106"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4111525/pdf/10.1177_1084713809336421.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28179631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rosalie M Uchanski, Lisa S Davidson, Sharon Quadrizius, Ruth Reeder, Jamie Cadieux, Jerrica Kettel, Richard A Chole
{"title":"Two ears and two (or more?) devices: a pediatric case study of bilateral profound hearing loss.","authors":"Rosalie M Uchanski, Lisa S Davidson, Sharon Quadrizius, Ruth Reeder, Jamie Cadieux, Jerrica Kettel, Richard A Chole","doi":"10.1177/1084713809336423","DOIUrl":"https://doi.org/10.1177/1084713809336423","url":null,"abstract":"<p><p>Advances in technology and expanding candidacy guidelines have motivated many clinics to consider children with precipitously sloping high-frequency hearing loss as candidates for cochlear implants (CIs). A case study is presented of a pediatric CI patient whose hearing thresholds were preserved within 10 dB of preimplant levels (125-750 Hz) after receiving a fully inserted 31.5-mm electrode array at one ear. The primary goal of this study was to explore the possible benefit of using both a hearing aid (HA) and a CI at one ear while using a HA at the opposite ear. The authors find that although the use of bilateral hearing aids with a CI may only provide a slight benefit, careful attention must be paid to the coordinated fitting of devices, especially at the ear with two devices.</p>","PeriodicalId":48972,"journal":{"name":"Trends in Amplification","volume":"13 2","pages":"107-23"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1084713809336423","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28179632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effects of high-rate pulse trains on electrode discrimination in cochlear implant users.","authors":"Christina L Runge-Samuelson","doi":"10.1177/1084713809336739","DOIUrl":"https://doi.org/10.1177/1084713809336739","url":null,"abstract":"<p><p>Overcoming issues related to abnormally high neural synchrony in response to electrical stimulation is one aspect in improving hearing with a cochlear implant. Desynchronization of electrical stimuli have shown benefits in neural encoding of electrical signals and improvements in psychophysical tasks. In the present study, 10 participants with either CII or HiRes 90k Advanced Bionics devices were tested for the effects of desynchronizing constant-amplitude high-rate (5,000 Hz) pulse trains on electrode discrimination of sinusoidal stimuli (1,000 Hz). When averaged across the sinusoidal dynamic range, overall improvements in electrode discrimination with high-rate pulses were found for 8 of 10 participants. This effect was significant for the group (p = .003). Nonmonotonic patterns of electrode discrimination as a function of sinusoidal stimulation level were observed. By providing additional spectral channels, it is possible that clinical implementation of constant-amplitude high-rate pulse trains in a signal processing strategy may improve performance with the device.</p>","PeriodicalId":48972,"journal":{"name":"Trends in Amplification","volume":"13 2","pages":"76-86"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1084713809336739","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28179630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"From the editor.","authors":"Charles J Limb","doi":"10.1177/1084713809335819","DOIUrl":"https://doi.org/10.1177/1084713809335819","url":null,"abstract":"","PeriodicalId":48972,"journal":{"name":"Trends in Amplification","volume":"13 2","pages":"75"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1084713809335819","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32838054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Soft cochlear implantation: rationale for the surgical approach.","authors":"David R Friedland, Christina Runge-Samuelson","doi":"10.1177/1084713809336422","DOIUrl":"10.1177/1084713809336422","url":null,"abstract":"<p><p>Recent advances in cochlear implant technology have focused renewed attention on the preservation of residual hearing. The focus on preservation of residual hearing is driven by the concept of electroacoustic stimulation. This option depends on the insertion of a short cochlear implant electrode into the basal region of the cochlea while preserving native function in the apical region. The desire to preserve residual hearing has led to the development of the soft-surgery cochlear implantation technique. Here, the authors evaluate its various components. Avoiding entry of blood into the cochlea and the use of hyaluronate seem to be reasonably supported, whereas the use of topical steroids is unlikely to be beneficial. The site of entry into the cochlea, the use of contoured or straight devices, and the depth of insertion are also evaluated. The authors highlight the importance of systematic recording of outcomes and surgical events.</p>","PeriodicalId":48972,"journal":{"name":"Trends in Amplification","volume":"13 2","pages":"124-38"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4111526/pdf/10.1177_1084713809336422.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28179633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Trends in AmplificationPub Date : 2009-03-01Epub Date: 2008-12-11DOI: 10.1177/1084713808325412
Charlotte M Reed, Louis D Braida, Patrick M Zurek
{"title":"Review article: review of the literature on temporal resolution in listeners with cochlear hearing impairment: a critical assessment of the role of suprathreshold deficits.","authors":"Charlotte M Reed, Louis D Braida, Patrick M Zurek","doi":"10.1177/1084713808325412","DOIUrl":"10.1177/1084713808325412","url":null,"abstract":"<p><p>A critical review of studies of temporal resolution in listeners with cochlear hearing impairment is presented with the aim of assessing evidence for suprathreshold deficits. Particular attention is paid to the roles of variables-such as stimulus audibility, overall stimulus level, and participant's age-which may complicate the interpretation of experimental findings in comparing the performance of hearing-impaired (HI) and normal-hearing (NH) listeners. On certain temporal tasks (e.g., gap detection), the performance of HI listeners appears to be degraded relative to that of NH listeners when compared at equal SPL (sound pressure level). For other temporal tasks (e.g., forward masking), HI performance is degraded relative to that of NH listeners when compared at equal sensation level. A relatively small group of studies exists, however, in which the effects of stimulus audibility and level (and occasionally participant's age) have been controlled through the use of noise-masked simulation of hearing loss in NH listeners. For some temporal tasks (including gap-detection, gap-duration discrimination, and detection of brief tones in modulated noise), the performance of HI listeners is well reproduced in the results of noise-masked NH listeners. For other tasks (i.e., temporal integration), noise-masked hearing-loss simulations do not reproduce the results of HI listeners. In three additional areas of temporal processing (duration discrimination, detection of temporal modulation in noise, and various temporal-masking paradigms), further studies employing control of stimulus audibility and level, as well as age, are necessary for a more complete understanding of the role of suprathreshold deficits in the temporal-processing abilities of HI listeners.</p>","PeriodicalId":48972,"journal":{"name":"Trends in Amplification","volume":"13 1","pages":"4-43"},"PeriodicalIF":0.0,"publicationDate":"2009-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2880464/pdf/10.1177_1084713808325412.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"27893491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"From the editor.","authors":"Charles J Limb","doi":"10.1177/1084713808331221","DOIUrl":"https://doi.org/10.1177/1084713808331221","url":null,"abstract":"The Army Lawyer is published monthly by The Judge Advocate General's School for the official use of Army lawyers in the performance of their legal responsibilities. The opinions expressed by the authors in the articles, however, do not necessarily reflect the view of The Judge Advocate General or the Department of the Army. Masculine or feminine pronouns appearing in this pamphlet refer to both genders unless the context indicates another use.","PeriodicalId":48972,"journal":{"name":"Trends in Amplification","volume":"13 1","pages":"3"},"PeriodicalIF":0.0,"publicationDate":"2009-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1084713808331221","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32838055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Zekveld, S. Kramer, J. Kessens, M. Vlaming, T. Houtgast
{"title":"User Evaluation of a Communication System That Automatically Generates Captions to Improve Telephone Communication","authors":"A. Zekveld, S. Kramer, J. Kessens, M. Vlaming, T. Houtgast","doi":"10.1177/1084713808330207","DOIUrl":"https://doi.org/10.1177/1084713808330207","url":null,"abstract":"This study examined the subjective benefit obtained from automatically generated captions during telephone-speech comprehension in the presence of babble noise. Short stories were presented by telephone either with or without captions that were generated offline by an automatic speech recognition (ASR) system. To simulate online ASR, the word accuracy (WA) level of the captions was 60% or 70% and the text was presented delayed to the speech. After each test, the hearing impaired participants (n = 20) completed the NASA-Task Load Index and several rating scales evaluating the support from the captions. Participants indicated that using the erroneous text in speech comprehension was difficult and the reported task load did not differ between the audio + text and audio-only conditions. In a follow-up experiment (n = 10), the perceived benefit of presenting captions increased with an increase of WA levels to 80% and 90%, and elimination of the text delay. However, in general, the task load did not decrease when captions were presented. These results suggest that the extra effort required to process the text could have been compensated for by less effort required to comprehend the speech. Future research should aim at reducing the complexity of the task to increase the willingness of hearing impaired persons to use an assistive communication system automatically providing captions. The current results underline the need for obtaining both objective and subjective measures of benefit when evaluating assistive communication systems.","PeriodicalId":48972,"journal":{"name":"Trends in Amplification","volume":"13 1","pages":"44 - 68"},"PeriodicalIF":0.0,"publicationDate":"2009-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1084713808330207","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"65775593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}