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Ear and Hearing

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https://www.readbyqxmd.com/read/27879487/electrocochleography-in-cochlear-implant-recipients-with-residual-hearing-comparison-with-audiometric-thresholds
#1
Kanthaiah Koka, Aniket A Saoji, Leonid M Litvak
OBJECTIVES: To determine whether electrocochleography (ECoG) thresholds, especially cochlear microphonic and auditory nerve neurophonic thresholds, measured using an intracochlear electrode, can be used to predict pure-tone audiometric thresholds following cochlear implantation in ears with residual hearing. DESIGN: Pure-tone audiometric thresholds and ECoG waveforms were measured at test frequencies from 125 to 4000 Hz in 21 Advanced Bionics cochlear implant recipients with residual hearing in the implanted ear...
November 22, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27861251/fast-click-rate-electrocochleography-and-auditory-brainstem-response-in-normal-hearing-adults-using-continuous-loop-averaging-deconvolution
#2
Wafaa A Kaf, Kelly M Lewis, Erdem Yavuz, Samantha M Dixon, Mark Van Ess, Abdullah M Jamos, Rafael E Delgado
OBJECTIVES: Using the continuous loop averaging deconvolution (CLAD) technique for conventional electrocochleography (ECochG) and auditory brainstem response (ABR) recordings, the effects of testing at high stimulus rates may have the potential to diagnose disorders of the inner ear and auditory nerve. First, a body of normative data using the CLAD technique must be established. DESIGN: Extratympanic click ECochG and ABR to seven stimulus rates using CLAD were measured simultaneously from a tympanic membrane electrode and surface electrodes on the forehead and mastoid of 42 healthy individuals...
November 16, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27828788/sequential-bilateral-cochlear-implantation-in-children-outcome-of-the-second-implant-and-long-term-use
#3
Marte Myhrum, Henrik Strøm-Roum, Mariann Gjervik Heldahl, Arne Kirkhorn Rødvik, Beth Eksveen, Borghild Landsvik, Kjell Rasmussen, Ole Edvard Tvete
OBJECTIVES: The aim of this retrospective cohort study was to assess speech perception outcomes of second-side cochlear implants (CI2) relative to first-side implants (CI1) in 160 participants who received their CI1 as a child. The predictive factors of CI2 speech perception outcomes were investigated. In addition, CI2 device use predictive models were assessed using the categorical variable of participant's decision to use CI2 for a minimum of 5 years after surgery. Findings from a prospective study that evaluated the bilateral benefit for speech recognition in noise in a participant subgroup (n = 29) are also presented...
November 8, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27787395/comparison-of-different-electrode-configurations-for-the-ovemp-with-bone-conducted-vibration
#4
Robby Vanspauwen, Floris L Wuyts, Stefanie Krijger, Leen K Maes
OBJECTIVES: This study was performed to compare three electrode configurations for the ocular vestibular evoked myogenic potentials (oVEMPs)-"standard," "sternum," and "nose"-by making use of bone-conducted stimuli (at the level of Fz with a minishaker). In the second part, we compared the test-retest reliability of the standard and nose electrode configuration on the oVEMP parameters. DESIGN: This study had a prospective design. Fourteen healthy subjects participated in the first part (4 males, 10 females; average age = 23...
October 26, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27787394/toward-automated-cochlear-implant-fitting-procedures-based-on-event-related-potentials
#5
Mareike Finke, Martin Billinger, Andreas Büchner
OBJECTIVES: Cochlear implants (CIs) restore hearing to the profoundly deaf by direct electrical stimulation of the auditory nerve. To provide an optimal electrical stimulation pattern the CI must be individually fitted to each CI user. To date, CI fitting is primarily based on subjective feedback from the user. However, not all CI users are able to provide such feedback, for example, small children. This study explores the possibility of using the electroencephalogram (EEG) to objectively determine if CI users are able to hear differences in tones presented to them, which has potential applications in CI fitting or closed loop systems...
October 26, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27787393/the-relationship-between-intensity-coding-and-binaural-sensitivity-in-adults-with-cochlear-implants
#6
Ann E Todd, Matthew J Goupell, Ruth Y Litovsky
OBJECTIVES: Many bilateral cochlear implant users show sensitivity to binaural information when stimulation is provided using a pair of synchronized electrodes. However, there is large variability in binaural sensitivity between and within participants across stimulation sites in the cochlea. It was hypothesized that within-participant variability in binaural sensitivity is in part affected by limitations and characteristics of the auditory periphery which may be reflected by monaural hearing performance...
October 26, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27787392/spatial-release-from-masking-in-children-effects-of-simulated-unilateral-hearing-loss
#7
Nicole E Corbin, Emily Buss, Lori J Leibold
OBJECTIVES: The purpose of this study was twofold: (1) to determine the effect of an acute simulated unilateral hearing loss on children's spatial release from masking in two-talker speech and speech-shaped noise, and (2) to develop a procedure to be used in future studies that will assess spatial release from masking in children who have permanent unilateral hearing loss. There were three main predictions. First, spatial release from masking was expected to be larger in two-talker speech than in speech-shaped noise...
October 26, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27768611/spectral-ripple-discrimination-in-normal-hearing-infants
#8
David L Horn, Jong Ho Won, Jay T Rubinstein, Lynne A Werner
OBJECTIVES: Spectral resolution is a correlate of open-set speech understanding in postlingually deaf adults and prelingually deaf children who use cochlear implants (CIs). To apply measures of spectral resolution to assess device efficacy in younger CI users, it is necessary to understand how spectral resolution develops in normal-hearing children. In this study, spectral ripple discrimination (SRD) was used to measure listeners' sensitivity to a shift in phase of the spectral envelope of a broadband noise...
October 20, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27764002/smartphone-based-hearing-screening-at-primary-health-care-clinics
#9
Christine Louw, De Wet Swanepoel, Robert H Eikelboom, Hermanus C Myburgh
OBJECTIVE: To evaluate the performance of smartphone-based hearing screening with the hearScreen™ application in terms of sensitivity, specificity, referral rates, and time efficiency at two primary health care clinics. DESIGN: Nonprobability purposive sampling was used at both clinics. A total of 1236 participants (mean age: 37.8 ± SD 17.9 and range 3 to 97 years; 71.3% female) were included in the final analysis. Participants were screened using the hearScreen™ application following a two-step screening protocol and diagnostic pure-tone audiometry to confirm hearing status...
October 19, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27764001/visual-temporal-acuity-is-related-to-auditory-speech-perception-abilities-in-cochlear-implant-users
#10
Kelly N Jahn, Ryan A Stevenson, Mark T Wallace
OBJECTIVES: Despite significant improvements in speech perception abilities following cochlear implantation, many prelingually deafened cochlear implant (CI) recipients continue to rely heavily on visual information to develop speech and language. Increased reliance on visual cues for understanding spoken language could lead to the development of unique audiovisual integration and visual-only processing abilities in these individuals. Brain imaging studies have demonstrated that good CI performers, as indexed by auditory-only speech perception abilities, have different patterns of visual cortex activation in response to visual and auditory stimuli as compared with poor CI performers...
October 19, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27755139/performance-intensity-function-and-aided-improvement-in-individuals-with-late-onset-auditory-neuropathy-spectrum-disorder
#11
Jijo Pottackal Mathai, Asha Yathiraj
OBJECTIVES: The purpose of the study was to explore the effect of intensity on speech perception in individuals with late-onset auditory neuropathy spectrum disorder (ANSD) by obtaining their performance-intensity (PI) function. Additionally, the study investigated the effect of PI function on aided speech perception. It was hypothesized that speech perception abilities of individuals with ANSD vary with intensity and may provide information regarding their aided performance. DESIGN: A factorial research design was used to obtain the PI function and aided performance...
October 13, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27749521/characterizing-speech-intelligibility-in-noise-after-wide-dynamic-range-compression
#12
Koenraad S Rhebergen, Thijs H Maalderink, Wouter A Dreschler
OBJECTIVES: The effects of nonlinear signal processing on speech intelligibility in noise are difficult to evaluate. Often, the effects are examined by comparing speech intelligibility scores with and without processing measured at fixed signal to noise ratios (SNRs) or by comparing the adaptive measured speech reception thresholds corresponding to 50% intelligibility (SRT50) with and without processing. These outcome measures might not be optimal. Measuring at fixed SNRs can be affected by ceiling or floor effects, because the range of relevant SNRs is not know in advance...
October 4, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27748664/processing-mechanisms-in-hearing-impaired-listeners-evidence-from-reaction-times-and-sentence-interpretation
#13
Rebecca Carroll, Verena Uslar, Thomas Brand, Esther Ruigendijk
OBJECTIVE: The authors aimed to determine whether hearing impairment affects sentence comprehension beyond phoneme or word recognition (i.e., on the sentence level), and to distinguish grammatically induced processing difficulties in structurally complex sentences from perceptual difficulties associated with listening to degraded speech. Effects of hearing impairment or speech in noise were expected to reflect hearer-specific speech recognition difficulties. Any additional processing time caused by the sustained perceptual challenges across the sentence may either be independent of or interact with top-down processing mechanisms associated with grammatical sentence structure...
September 28, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27779518/change-in-psychosocial-health-status-over-5-years-in-relation-to-adults-hearing-ability-in-noise
#14
Mariska Stam, Jan H Smit, Jos W R Twisk, Ulrike Lemke, Cas Smits, Joost M Festen, Sophia E Kramer
OBJECTIVES: The aim of this study was to establish the longitudinal relationship between hearing ability in noise and psychosocial health outcomes (i.e., loneliness, anxiety, depression, distress, and somatization) in adults aged 18 to 70 years. An additional objective was to determine whether a change in hearing ability in noise over a period of 5 years was associated with a change in psychosocial functioning. Subgroup effects for a range of factors were investigated. DESIGN: Longitudinal data of the web-based Netherlands Longitudinal Study on Hearing (NL-SH) (N = 508) were analyzed...
November 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27779517/factors-affecting-speech-perception-improvement-post-implantation-in-congenitally-deaf-adults
#15
Suzanne J O'Gara, Helen E Cullington, Mary L Grasmeder, Maria Adamou, Emily S Matthews
OBJECTIVES: To identify factors preimplantation associated with postimplantation speech perception improvement in the adult congenitally deaf population. DESIGN: Forty-four adult cochlear implant (CI) patients who had a severe to profound hearing loss from birth were identified from this centre's database. Eight preimplantation factors, speech intelligibility, preimplantation hearing levels, communication mode, preimplantation speech perception scores, progression of hearing loss, age at implantation, hearing aid use preimplantation, and gender, were recorded during the CI assessment process...
November 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27579988/electrically-evoked-auditory-event-related-responses-in-patients-with-auditory-brainstem-implants-morphological-characteristics-test-retest-reliability-effects-of-stimulation-level-and-association-with-auditory-detection
#16
Shuman He, Tyler C McFayden, Holly F B Teagle, Matthew Ewend, Lillian Henderson, Craig A Buchman
OBJECTIVE: This study aimed to (1) characterize morphological characteristics of the electrically evoked cortical auditory event-related potentials (eERPs) and explore the potential association between onset eERP morphology and auditory versus nonauditory stimulation; (2) assess test-retest reliability of onset eERPs; (3) investigate effects of stimulation level on onset eERPs; and (4) explore the feasibility of using the onset eERP to estimate the lowest stimulation level that can be detected for individual stimulating electrodes in patients with auditory brainstem implants (ABIs)...
November 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27560492/binaural-hearing-ability-with-bilateral-bone-conduction-stimulation-in-subjects-with-normal-hearing-implications-for-bone-conduction-hearing-aids
#17
Mehrnaz Zeitooni, Elina Mäki-Torkko, Stefan Stenfelt
OBJECTIVES: The purpose of this study is to evaluate binaural hearing ability in adults with normal hearing when bone conduction (BC) stimulation is bilaterally applied at the bone conduction hearing aid (BCHA) implant position as well as at the audiometric position on the mastoid. The results with BC stimulation are compared with bilateral air conduction (AC) stimulation through earphones. DESIGN: Binaural hearing ability is investigated with tests of spatial release from masking and binaural intelligibility level difference using sentence material, binaural masking level difference with tonal chirp stimulation, and precedence effect using noise stimulus...
November 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27556529/neonate-auditory-brainstem-responses-to-ce-chirp-and-ce-chirp-octave-band-stimuli-i-versus-click-and-tone-burst-stimuli
#18
Kensi M Cobb, Andrew Stuart
OBJECTIVES: The purpose of the study was to generate normative auditory brainstem response (ABR) wave component peak latency and amplitude values for neonates with air- and bone-conducted CE-Chirps and air-conducted CE-Chirp octave band stimuli (i.e., 500, 1000, 2000, and 4000 Hz). A second objective was to compare neonate ABRs to CE-Chirp stimuli with ABR responses to traditional click and tone burst stimuli with the same stimulus parameters. DESIGN: Participants were 168 healthy neonates...
November 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27556524/neonate-auditory-brainstem-responses-to-ce-chirp-and-ce-chirp-octave-band-stimuli-ii-versus-adult-auditory-brainstem-responses
#19
Kensi M Cobb, Andrew Stuart
OBJECTIVES: The purpose of the study was to examine the differences in auditory brainstem response (ABR) latency and amplitude indices to the CE-Chirp stimuli in neonates versus young adults as a function of stimulus level, rate, polarity, frequency and gender. DESIGN: Participants were 168 healthy neonates and 20 normal-hearing young adults. ABRs were obtained to air- and bone-conducted CE-Chirps and air-conducted CE-Chirp octave band stimuli. The effects of stimulus level, rate, and polarity were examined with air-conducted CE-Chirps...
November 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27438873/effects-of-self-generated-noise-on-estimates-of-detection-threshold-in-quiet-for-school-age-children-and-adults
#20
Emily Buss, Heather L Porter, Lori J Leibold, John H Grose, Joseph W Hall
OBJECTIVES: Detection thresholds in quiet become adult-like earlier in childhood for high than low frequencies. When adults listen for sounds near threshold, they tend to engage in behaviors that reduce physiologic noise (e.g., quiet breathing), which is predominantly low frequency. Children may not suppress self-generated noise to the same extent as adults, such that low-frequency self-generated noise elevates thresholds in the associated frequency regions. This possibility was evaluated by measuring noise levels in the ear canal simultaneous with adaptive threshold estimation...
November 2016: Ear and Hearing
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