scholarly journals Acoustic reflex measurements and the loudness function in sensorineural hearing loss

1980 ◽  
Vol 27 (1) ◽  
Author(s):  
Sheila Uliel
Keyword(s):  
Hearing Loss ◽  
Differential Diagnosis ◽  
Sensorineural Hearing Loss ◽  
Acoustic Impedance ◽  
Pure Tone ◽  
Sensorineural Hearing ◽  
Acoustic Reflex ◽  
Reflex Responses ◽  
Loudness Function ◽  
The Individual

The suprathreshold acoustic reflex responses of forty two ears affected by sensorineural hearing loss of cochlear origin and fifty-eight ears demonstrating normal hearing, were recorded by means of an electro-acoustic impedance meter and attached X-Y recorder. The recordings were done in ascending and descending fashion,  at successively increasing and decreasing 5dB intensity levels from 90-120-90 dB HL respectively, for the individual pure-tone frequencies of 500, 1 000, 2 000 and 4 000 Hz. The contralateral mode of measurement was employed. Analysis of  these recordings indicated that the acoustic reflex  responses could be differentiated into five  characteristic patterns of  growth, which could be depicted upon a continuum of peaked, peaked-rounded, rounded, rounded-flat,  and flat  shapes. The peaked and peaked-rounded patterns were found  to predominate at all four pure-tone frequencies  in the normal ears, while the rounded-fiat  and flat  patterns were found  to predominate only at the higher pure-tone frequencies of 2 000 and 4 000 Hz in the ears affected  by sensorineural hearing loss. This latter relationship was also able to be applied to two disorders of  the loudness functio— loudness recruitment and hyperacusis. It was concluded that the flattened  acoustic reflex  patterns at the higher pure-tone frequencies  constituted a potential diagnostic cue related to the differential  diagnosis of sensorineural hearing loss, and to disorders of  the loudness function.

Prediction of Hearing Levels from Acoustic Reflex Thresholds in Persons with High-Frequency Hearing Losses

1979 ◽  
Vol 22 (4) ◽  
pp. 697-707 ◽  
Author(s):  
Shlomo Silman ◽  
Stanley A. Gelfand
Keyword(s):  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
High Frequency ◽  
Pure Tone ◽  
Noise Exposure ◽  
Normal Hearing ◽  
Sensorineural Hearing ◽  
Acoustic Reflex ◽  
Bivariate Method ◽  
Patients At Risk

This study examined the precision of the bivariate method in subjects with high-frequency sensorineural hearing loss. The current bivariate data effectively separated normal hearing subjects from those with pure tone averages of ≥32 dB HL, in a manner consistent with the results of Popelka and Trumpf (1976) and Margolis and Fox (1977b). However, for persons with high-frequency losses the prediction of hearing levels from acoustic reflex thresholds (ARTs) appears to be complicated. Moderate hearing losses involving 500, 1000 and 2000 Hz (“speech frequencies”) as well as higher frequencies were identified on the basis of elevated average ARTs for 500, 1000 and 2000 Hz. Normal ears (pure tone averages of ≤30 dB HL) were isolated from others on the basis of position on the bivariate graph. Those with (1) normal hearing in the “speech frequencies” and a high-frequency loss and (2) a mild loss in the “speech frequencies” and a high-frequency loss, could be separated from those with normal hearing by location on the bivariate graph, and from those with moderate (or worse) losses on the basis of average ART for tones. Consideration of these findings is useful in the evaluation of patients at risk for high-frequency loss, such as patients with noise exposure, and is particularly useful in cases of suspected functional impairment within this population. A modification of the bivariate method is suggested which extends its application to patient populations with a large incidence of high frequency sensorineural hearing loss.

Hearing recovery from deafness caused by bromate intoxication

2018 ◽  
Vol 132 (11) ◽  
pp. 1039-1041 ◽  
Author(s):  
J Suzuki ◽  
Y Takanashi ◽  
A Koyama ◽  
Y Katori
Keyword(s):  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
Pure Tone ◽  
Pure Tone Audiometry ◽  
Auditory Brainstem ◽  
Sensorineural Hearing ◽  
Auditory Brainstem Responses ◽  
Common Symptom ◽  
Hearing Recovery ◽  
Continuous Haemodiafiltration

AbstractObjectivesSodium bromate is a strong oxidant, and bromate intoxication can cause irreversible severe-to-profound sensorineural hearing loss. This paper reports the first case in the English literature of bromate-induced hearing loss with hearing recovery measured by formal audiological assessment.Case reportA 72-year-old woman was admitted to hospital with complaints of profound hearing loss, nausea, diarrhoea and anuria after bromate ingestion in a suicide attempt. On admission, pure tone audiometry and auditory brainstem responses showed profound bilateral deafness. Under the diagnosis of bromate-induced acute renal failure and sensorineural hearing loss, continuous haemodiafiltration was performed. When dialysis was discontinued, pure tone audiometry and auditory brainstem responses showed partial threshold recovery from profound deafness.ConclusionSevere-to-profound sensorineural hearing loss is a common symptom of bromate intoxication. Bromate-induced hearing loss may be partially treated, and early application of continuous haemodiafiltration might be useful as a treatment for this intractable condition.

Otologics Fully Implantable Hearing Device Phase II Results

2008 ◽  
Vol 139 (2_suppl) ◽  
pp. P57-P57
Author(s):  
Drew M Horlbeck ◽  
Herman A Jenkins ◽  
Ben J Balough ◽  
Michael E Hoffer
Keyword(s):  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
Phase Ii ◽  
Hearing Aids ◽  
Repeated Measures ◽  
Pure Tone ◽  
Sound Field ◽  
Sensorineural Hearing ◽  
Significant Difference ◽  
Hearing Device

Objective The efficacy of the Otologics Fully Implantable Hearing Device (MET) was assessed in adult patients with bilateral moderate to severe sensorineural hearing loss. Methods Surgical insertion of this totally implanted system was identical to the Phase I study. A repeated-measures within-subjects design assessed aided sound field thresholds and speech performances with the subject's own, appropriately fit, walk-in hearing aid(s) and the Otologics Fully Implantable Hearing Device. Results Six- and 12-month Phase II data will be presented. Ten patients were implanted and activated as part Phase II clinical trial. Three patients were lost to long term follow-up due to two coil failures and one ossicular abnormality preventing proper device placement. No significant differences between preoperative (AC = 59 dB, BC = 55 dB) and postoperative (AC = 61 dB, BC = 54 dB) unaided pure tone averages were noted (p < 0.05). Pure tone average implant aided thresholds (41 dB) were equivalent to that of walk-in-aided (37 dB) condition with no significant difference (p < 0.05) between patients’ walk-in-aided individual frequency thresholds and implant-aided thresholds. Word recognition scores and hearing in noise scores were similar between the walk-in-aided and for the implant-aided condition. Patient benefit scales will be presented at all end points. Conclusions Results of the Otologics MET Fully Implantable Hearing Device Phase II trial provide evidence that this fully implantable device is a viable alternative to currently available hearing aids in patients with sensorineural hearing loss.

scholarly journals A Smartphone-Based Approach to Screening for Sudden Sensorineural Hearing Loss: Cross-Sectional Validity Study

10.2196/23047 ◽  
2020 ◽  
Vol 8 (11) ◽  
pp. e23047
Author(s):  
Heng-Yu Haley Lin ◽  
Yuan-Chia Chu ◽  
Ying-Hui Lai ◽  
Hsiu-Lien Cheng ◽  
Feipei Lai ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
Gold Standard ◽  
Pure Tone ◽  
Pure Tone Audiometry ◽  
Sudden Sensorineural Hearing Loss ◽  
Sensorineural Hearing ◽  
Clinical Settings ◽  
Cross Sectional ◽  
Scale Difference

Background Sudden sensorineural hearing loss (SSNHL) is an otologic emergency that warrants urgent management. Pure-tone audiometry remains the gold standard for definitively diagnosing SSNHL. However, in clinical settings such as primary care practices and urgent care facilities, conventional pure-tone audiometry is often unavailable. Objective This study aimed to determine the correlation between hearing outcomes measured by conventional pure-tone audiometry and those measured by the proposed smartphone-based Ear Scale app and determine the diagnostic validity of the hearing scale differences between the two ears as obtained by the Ear Scale app for SSNHL. Methods This cross-sectional study included a cohort of 88 participants with possible SSNHL who were referred to an otolaryngology clinic or emergency department at a tertiary medical center in Taipei, Taiwan, between January 2018 and June 2019. All participants underwent hearing assessments with conventional pure-tone audiometry and the proposed smartphone-based Ear Scale app consecutively. The gold standard for diagnosing SSNHL was defined as the pure-tone average (PTA) difference between the two ears being ≥30 dB HL. The hearing results measured by the Ear Scale app were presented as 20 stratified hearing scales. The hearing scale difference between the two ears was estimated to detect SSNHL. Results The study sample comprised 88 adults with a mean age of 46 years, and 50% (44/88) were females. PTA measured by conventional pure-tone audiometry was strongly correlated with the hearing scale assessed by the Ear Scale app, with a Pearson correlation coefficient of .88 (95% CI .82-.92). The sensitivity of the 5–hearing scale difference (25 dB HL difference) between the impaired ear and the contralateral ear in diagnosing SSNHL was 95.5% (95% CI 87.5%-99.1%), with a specificity of 66.7% (95% CI 43.0%-85.4%). Conclusions Our findings suggest that the proposed smartphone-based Ear Scale app can be useful in the evaluation of SSNHL in clinical settings where conventional pure-tone audiometry is not available.

Significance of 1 kHz Pure-tone Threshold in Acute Low-frequency Sensorineural Hearing Loss

2018 ◽  
Vol 39 (10) ◽  
pp. e950-e955
Author(s):  
Chi Kyou Lee ◽  
Jong Bin Lee ◽  
Kye Hoon Park ◽  
Ho Yun Lee ◽  
Mi-Jin Choi ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
Pure Tone ◽  
Low Frequency ◽  
Sensorineural Hearing ◽  
Pure Tone Threshold

Validation of multi-channel auditory steady-state response in adults with sensorineural hearing loss

2008 ◽  
Vol 123 (1) ◽  
pp. 38-44 ◽  
Author(s):  
Y-H Lin ◽  
P-R Chen ◽  
C-J Hsu ◽  
H-P Wu
Keyword(s):  
Hearing Loss ◽  
Steady State ◽  
Sensorineural Hearing Loss ◽  
Pure Tone ◽  
Sensorineural Hearing ◽  
Steady State Response ◽  
Academic Medical Centre ◽  
State Response ◽  
Auditory Steady State Response ◽  
Response Thresholds

AbstractObjective:For various medico-legal and financial reasons, some patients may clinically demonstrate an exaggerated hearing loss that varies in degree, nature and laterality. The purpose of this study was to evaluate whether multi-channel auditory steady-state response measurement can be used as an objective test of auditory thresholds in adults with sensorineural hearing loss.Study design and setting:This was a prospective, comparative, experimental research design study conducted in an academic medical centre. From January to June 2007, 142 subjects (284 ears) with varying degrees of sensorineural hearing loss were included. Four commonly used frequencies (500, 1000, 2000 and 4000 Hz) were evaluated. Both pure tone thresholds and multi-channel auditory steady-state response thresholds were obtained for each ear in all subjects. The correlation of auditory steady-state response thresholds and pure tone thresholds was assessed. The time taken for multi-channel auditory steady-state response testing was also recorded.Results:Results for multi-channel auditory steady-state response thresholds and pure tone thresholds were compared for each test frequency. A difference of less than 15 dB was found in 71 per cent of patients, while a difference of less than 20 dB was found in 83 per cent. Correlation between auditory steady-state response thresholds and pure tone thresholds, expressed as the correlation coefficient (r), was 0.89, 0.95, 0.96 and 0.97 at 500, 1000, 2000 and 4000 Hz, respectively. The strength of the relationship between auditory steady-state response thresholds and pure tone thresholds increased with increasing frequency and increasing degree of hearing loss. The recorded auditory steady-state response thresholds were used to calculate regression lines predicting pure tone threshold results. The mean estimated pure tone thresholds calculated from these regression lines were all within 10 dB of the actual recorded pure tone thresholds. The average multi-channel auditory steady-state response test duration was 42 minutes per patient.Conclusion:Measurement of multi-channel auditory steady-state response could be a powerful, convenient electro-physiological examination with which to objectively certify clinical hearing impairment in adults.

Comparison of wideband and clinical acoustic reflex thresholds in patients with normal hearing and sensorineural hearing loss

2018 ◽  
Vol 144 (3) ◽  
pp. 1834-1834
Author(s):  
M. P. Feeney ◽  
Kim Schairer ◽  
Douglas H. Keefe ◽  
Denis Fitzpatrick ◽  
Daniel Putterman ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
Normal Hearing ◽  
Sensorineural Hearing ◽  
Acoustic Reflex
Sign in / Sign up

Export Citation Format

Share Document