scholarly journals The Physiologic and Psychophysical Consequences of Severe-to-Profound Hearing Loss

2018 ◽  
Vol 39 (04) ◽  
pp. 349-363 ◽  
Author(s):  
Eric Hoover ◽  
Pamela Souza
Keyword(s):  
Hearing Loss ◽  
Speech Recognition ◽  
Treatment Options ◽  
Sufficient Information ◽  
Noisy Environments ◽  
Cochlear Function ◽  
Profound Hearing Loss ◽  
Sound Perception ◽  
Severe Hearing Loss ◽  
Tuning Curves

AbstractSubstantial loss of cochlear function is required to elevate pure-tone thresholds to the severe hearing loss range; yet, individuals with severe or profound hearing loss continue to rely on hearing for communication. Despite the impairment, sufficient information is encoded at the periphery to make acoustic hearing a viable option. However, the probability of significant cochlear and/or neural damage associated with the loss has consequences for sound perception and speech recognition. These consequences include degraded frequency selectivity, which can be assessed with tests including psychoacoustic tuning curves and broadband rippled stimuli. Because speech recognition depends on the ability to resolve frequency detail, a listener with severe hearing loss is likely to have impaired communication in both quiet and noisy environments. However, the extent of the impairment varies widely among individuals. A better understanding of the fundamental abilities of listeners with severe and profound hearing loss and the consequences of those abilities for communication can support directed treatment options in this population.

Speech Recognition In Hearing Aids: Used For Assessing CI Candidacy In Tonal Language Population

2021 ◽  
Author(s):  
Yu-Lin Chang ◽  
Chia-Jou Liu ◽  
Pey-Yu Chen ◽  
Hung-Ching Lin
Keyword(s):  
Hearing Loss ◽  
Speech Recognition ◽  
Recognition Test ◽  
Hearing Aids ◽  
Hearing Aid ◽  
Recognition Performance ◽  
Pure Tone Audiometry ◽  
Profound Hearing Loss ◽  
Tonal Language ◽  
Severe Hearing Loss

Abstract Objective: CI (cochlear implantation) candidacy is somewhat controversial in severe hearing loss among tonal mandarin-speaking patients. To assess the relationship between pure tone audiometry (PTA) and speech recognition score (SRS), with and without hearing aid amplification, among patients who did not meet the NIH criteria of CI candidacy in tonal language mandarian-speaking countries, especially those with severe hearing loss (70 dB HL < 4FPTA(0.5, 1, 2, 4 KHz) ≤ 90 dB HL) Materials and Methods: A total of 414 patients with sensorineural hearing loss with 774 ears were reviewed retrospectively in a tertiary referral center. The Mandarin Monosyllable Recognition Test (MMRT) was used to evaluate the SRS of these ears. Results: 31% (10/32) of the 32 ears with severe hearing loss, 70-90 dB HL, still showed poor speech recognition (SRS<30%) after hearing aid amplification, while 71% (46/65) of the 65 ears with profound hearing loss, > 90 dB HL, showed poor speech recognition with hearing aid amplification. Conclusions: The speech audiometry with Mandarin Monosyllable Recognition Test (MMRT) helped identify those patients whose 4FPTA< 90 dB HL fell outside the CI candidacy criteria of NIH in tonal language mandarin-speaking countries but showed significantly poor (SRS< 30%) speech recognition performance.

Direct drug application to the round window: A comparative study of ototoxicity in rats

2009 ◽  
Vol 141 (5) ◽  
pp. 584-590 ◽  
Author(s):  
Silvia Murillo-Cuesta ◽  
Fernando García-Alcántara ◽  
Elena Vacas ◽  
Jon Alexander Sistiaga ◽  
Guadalupe Camarero ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Cell Damage ◽  
Round Window ◽  
Drug Application ◽  
Local Drug Delivery ◽  
Saline Control ◽  
Round Window Membrane ◽  
Cochlear Function ◽  
Profound Hearing Loss ◽  
Brainstem Response

Objective: To assess the validity of inducing ototoxicity in rats by applying a sponge soaked in kanamycin and furosemide on the round window. Study Design: Basic, randomized, nonblind experimental study. Setting: Animal models of cochlear damage and reliable methods of local drug delivery are fundamental to study hearing loss and to design new therapies. Subjects and Methods: Four experimental groups of six Wistar rats with different methods of drug administration were used: (1) injection of subcutaneous kanamycin (400 mg/kg) and intravenous furosemide (100 mg/kg); (2) local application of a sponge soaked in saline close to the round window; (3) animals for which the sponge was soaked in a solution containing kanamycin (200 mg/mL) and furosemide (50 mg/mL); and (4) sham-operated rats. The tympanic bulla was exposed using a ventral approach, and a bullostomy was performed to visualize the round window membrane. Cochlear function was assessed by measuring the auditory brainstem response, and hearing thresholds in response to click and tone burst stimuli were determined as peak and interpeak latencies. At the end of the study, cochlear histology was analyzed. Results: Systemic administration of kanamycin and furosemide induced profound hearing loss and severe hair cell damage. Local delivery of these ototoxic drugs caused comparable damage but avoided the systemic side effects of the drug. Sham-operated and saline control animals did not experience functional alterations. Conclusion: Situating a sponge soaked in kanamycin and furosemide on the round window membrane through the ventral approach is a reliable method to provoke local ototoxicity in rats.

scholarly journals Evidence of Acclimatization in Persons with Severe-to-Profound Hearing Loss

2003 ◽  
Vol 14 (02) ◽  
pp. 084-099 ◽  
Author(s):  
Francis K. Kuk ◽  
Lisa Potts ◽  
Michael Valente ◽  
Lidia Lee ◽  
Jay Picirrillo
Keyword(s):  
Hearing Loss ◽  
Speech Recognition ◽  
Hearing Aids ◽  
Hearing Aid ◽  
Profound Hearing Loss ◽  
Secondary Purpose ◽  
Objective Performance ◽  
Recognition Testing ◽  
The One ◽  
Better Than

The present study examined the phenomenon of acclimatization in persons with a severe-to-profound hearing loss. A secondary purpose was to examine the efficacy of a digital nonlinear power hearing aid that has a low compression threshold with expansion for this population. Twenty experienced hearing aid users wore the study hearing aids for three months and their performance with the study hearing aids was evaluated at the initial fitting, one month, and three months after the initial fitting. Performance of their current hearing aids was also evaluated at the initial fitting. Speech recognition testing was conducted at input levels of 50 dB SPL and 65 dB SPL in quiet, and 75 dB SPL in noise at a +10 SNR. Questionnaires were used to measure subjective performance at each evaluation interval. The results showed improvement in speech recognition score at the one-month evaluation over the initial evaluation. No significant improvement was seen at the three-month evaluation from the one-month visit. In addition, subjective and objective performance of the study hearing aids was significantly better than the participants' own hearing aids at all evaluation intervals. These results provided evidence of acclimatization in persons with a severe-to-profound hearing loss and reinforced the precaution that any trial of amplification, especially from linear to nonlinear mode, should consider this phenomenon.

scholarly journals Audio-Visual Speech Recognition Using Convolutive Bottleneck Networks for a Person with Severe Hearing Loss

2015 ◽  
Vol 7 (0) ◽  
pp. 64-68 ◽  
Author(s):  
Yuki Takashima ◽  
Yasuhiro Kakihara ◽  
Ryo Aihara ◽  
Tetsuya Takiguchi ◽  
Yasuo Ariki ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Speech Recognition ◽  
Visual Speech ◽  
Severe Hearing Loss ◽  
Visual Speech Recognition

scholarly journals Cochlear Implants in Patients with Fluctuant or Progressive Hearing Loss on the Better Ear

2020 ◽  
Author(s):  
Pedro Luiz Mangabeira-Albernaz ◽  
Andrea Felice dos Santos Malerbi
Keyword(s):  
Hearing Loss ◽  
Cochlear Implants ◽  
Sound Localization ◽  
Unilateral Hearing Loss ◽  
Speech Understanding ◽  
Noisy Environments ◽  
Progressive Hearing Loss ◽  
Profound Hearing Loss ◽  
Unilateral Deafness ◽  
Definite Improvement

Abstract Introduction Cochlear implants have been proposed for cases of unilateral hearing loss, especially in patients with tinnitus impairment. Several studies have shown that they result in definite improvement of sound localization and speech understanding, both in quiet and noisy environments. On the other hand, there are few references regarding cochlear implants in patients whose better ears present hearing loss. Objective To report the audiological outcomes of three patients with unilateral deafness, in whom the better ears presented hearing losses, submitted to cochlear implants. Methods Three patients with unilateral profound hearing loss underwent a cochlear implant performed by the same surgeon. Results The patients' data are presented in detail. Conclusion The indications for cochlear implants are becoming more diverse with the expansion of clinical experience and the observation that they definitely help patients with special hearing problems.

Efficacy of Hearing-Aid Based Telephone Strategies for Listeners with Moderate-to-Severe Hearing Loss

2013 ◽  
Vol 24 (01) ◽  
pp. 059-070 ◽  
Author(s):  
Erin M. Picou ◽  
Todd A. Ricketts
Keyword(s):  
Hearing Loss ◽  
Speech Recognition ◽  
Sensorineural Hearing Loss ◽  
Hearing Aid ◽  
Recognition Performance ◽  
Sensorineural Hearing ◽  
Subjective Ratings ◽  
Severe Hearing Loss ◽  
Acoustic Coupling ◽  
Wireless Routing

Background: Understanding speech over the telephone when listening in noisy environments may present a significant challenge for listeners with moderate-to-severe hearing loss. Purpose: The purpose of this study was to compare speech recognition and subjective ratings across several hearing aid-based telephone listening strategies for individuals with moderate-to-severe sensorineural hearing loss. Research Design: Speech recognition and subjective ratings were evaluated for a simulated telephone signal. The strategies evaluated included acoustic telephone, unilateral telecoil, unilateral wireless streaming, and bilateral wireless streaming. Participants were seated in a noisy room for all evaluations. Study Sample: Eighteen adults, aged 49–88 yr, with moderate-to-severe sensorineural hearing loss participated. Data Collection and Analysis: Speech recognition scores on the Connected Speech Test were converted to rationalized arcsine units and analyzed using analysis of variance testing and Tukey post hoc analyses. Subjective ratings of ease and comfort were also analyzed in this manner. Results: Speech recognition performance was poorest with acoustic coupling to the telephone and best with bilateral wireless routing. Telecoil coupling resulted in better speech recognition performance than acoustic coupling, but was significantly poorer than bilateral wireless routing. Furthermore, unilateral wireless routing and telecoil coupling generally led to similar speech recognition performance, except in lower-level background noise conditions, for which unilateral routing resulted in better performance than the telecoil. Conclusions: For people with moderate-to-severe sensorineural hearing loss, acoustic telephone listening with a hearing aid may not lead to acceptable performance in noise. Although unilateral routing options (telecoil and wireless streaming) improved performance, speech recognition performance and subjective ratings of ease and comfort were best when bilateral wireless routing was used. These results suggest that wireless routing is a potentially beneficial telephone listening strategy for listeners with moderate-to-severe hearing loss who are fitted with limited venting if the telephone signal is routed to both ears. Unilateral wireless routing may provide similar benefits to traditional unilateral telecoil. However, the newer wireless systems may have the advantage for some listeners in that they do not include some of the positioning constraints associated with telecoil use.

scholarly journals The Characteristics of Adults with Severe Hearing Loss

2018 ◽  
Vol 29 (08) ◽  
pp. 764-779 ◽  
Author(s):  
Pamela Souza ◽  
Eric Hoover ◽  
Michael Blackburn ◽  
Frederick Gallun
Keyword(s):  
Hearing Loss ◽  
Speech Recognition ◽  
Assistive Technology ◽  
Spectral Resolution ◽  
Hearing Aids ◽  
Technology Use ◽  
Hearing Aid ◽  
Published Data ◽  
Severe Hearing Loss ◽  
Wide Range

AbstractSevere hearing loss impairs communication in a wide range of listening environments. However, we lack data as to the specific objective and subjective abilities of listeners with severe hearing loss. Insight into those abilities may inform treatment choices.The primary goal was to describe the audiometric profiles, spectral resolution ability, and objective and subjective speech perception of a sample of adult listeners with severe hearing loss, and to consider the relationships among those measures. We also considered the typical fitting received by individuals with severe loss, in terms of hearing aid style, electroacoustic characteristics, and features, as well as supplementary device use.A within-subjects design was used.Participants included 36 adults aged 54–93 yr with unilateral or bilateral severe hearing loss.Testing included a full hearing and hearing aid history; audiometric evaluation; loudness growth and dynamic range; spectral resolution; assessment of cochlear dead regions; objective and subjective assessment of speech recognition; and electroacoustic evaluation of current hearing aids. Regression models were used to analyze relationships between hearing loss, spectral resolution, and speech recognition.For speech in quiet, 60% of the variance was approximately equally accounted for by amount of hearing loss, spectral resolution, and number of dead regions. For speech in noise, only a modest proportion of performance variance was explained by amount of hearing loss. In general, participants were wearing amplification of appropriate style and technology for their hearing loss, but the extent of assistive technology use was low. Subjective communication ratings depended on the listening situation, but in general, were similar to previously published data for adults with mild-to-moderate loss who did not wear hearing aids.The present data suggest that the range of abilities of an individual can be more fully captured with comprehensive testing. Such testing also offers an opportunity for informed counseling regarding realistic expectations for hearing aid use and the availability of hearing assistive technology.

scholarly journals A study of brainstem evoked response audiometry in children with severe hearing loss

2019 ◽  
Vol 5 (3) ◽  
pp. 678
Author(s):  
Rakhi Kumari ◽  
Rajiv Kumar Jain ◽  
Dhananjay Kumar
Keyword(s):  
Risk Factors ◽  
Hearing Loss ◽  
Evoked Response ◽  
Profound Hearing Loss ◽  
Cross Sectional ◽  
Prolonged Stay ◽  
Severe Hearing Loss ◽  
Brainstem Evoked Response Audiometry ◽  
History Of ◽  
Evoked Response Audiometry

<p class="abstract"><strong>Background:</strong> Brainstem evoked response audiometry (BERA) is a non-invasive diagnostic tool which can be used to assess the early hearing loss. The objectives of the study were to find out the risk factors for severe hearing loss in children and to evaluate the role of BERA in early diagnosis of severe hearing loss in children.</p><p class="abstract"><strong>Methods:</strong> The present hospital based cross sectional study was conducted on 105 children suffering from severe hearing loss. Risk factors of hearing loss was assessed in these children and brainstem evoked response audiometry was performed.  </p><p class="abstract"><strong>Results:</strong> Out of 105 children studied risk factors for hearing loss were present in 69 cases (65.71%) in which several cases had multiple risk factors. History of prolonged stay at NICU was present in 23 cases (21.9%). 11 (10.5%) cases had suffered from meningitis while history of cerebral malaria was present in 2 cases (1.9%). History of cerebral palsy was present in 5.7% cases. The family history of hearing loss was present in 15 patients (14.3%). Bilateral severe hearing loss was present in 76 cases (72.4%) while in 13 cases (12.4%) there was bilateral severe to profound hearing loss assessed using BERA test.</p><p class="abstract"><strong>Conclusions:</strong> Early detection and timely intervention can not only help prevent this silent handicap of deafness but also contribute to social and economic productivity of a community.</p>

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