Wertabschätzung der MIRA (Multichannel Infant Reflex Audiometry) - Teil 1 Zur Antworterkennung aus den Aktivitätskurven
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The activity curves (sucking, breathing, eye movements) of 18 babies were inspected for alterations which might indicate reactions of hearing. In 10 cases, 4 of them also confirmed by ABR findings, we found it possible to deduce the hearing threshold from alterations of the respective activities alone even without knowledge of the occurrence of the stimulus (blind experiment, addition of the stimulus time after identification of activity alterations). Greater discrepancies are discussed with respect to the experience of the investigator and to different methods of audiometry.Keywords:
Stimulus (psychology)
Introduction The audiological evaluation has the main objective of determining the integrity of the auditory system. Pure tone audiometry is a standardized behavioral procedure that aims to investigate auditory thresholds to describe auditory sensitivity. Despite being recognized since the mid-1960s, high frequency audiometry is still little used and explored in clinical practice, and its use is more considered as an audiological monitoring tool or as a research tool. Objective To analyze the audiological thresholds of high frequency audiometry in normal hearing individuals, and to verify the predictive capacity of age in the auditory thresholds of high frequency audiometry. Methods This is a retrospective, cross-sectional, and quantitative study that was approved by the Research Ethics Committee under number 5.039.583/21. The procedures were: clinical evaluation, pure tone audiometry, acoustic immittance measurements, and high frequency audiometry. All data collected from the exams were tabulated in an Excel spreadsheet and analyzed using appropriate statistical tests in the Statistical Package Social Sciences software. Results A total of 980 medical records were analyzed. The right and left ears presented similar tonal hearing thresholds for the frequencies of 12 kHz and 16 kHz. The threshold variance of 29.8% in the 12 kHz frequency can be explained by the variance of age, while, for the frequency of 16 kHz, this percentage is of 46.4%. Conclusion For 12 kHz hearing thresholds, an increase of 1 year leads to a 0.66 dBHL increase in hearing threshold. For 16 kHz hearing thresholds, an increase of 1 year leads to a 1.02 dBHL increase in hearing threshold.
Pure tone audiometry
Audiogram
Pure tone
Statistical Analysis
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Audiogram
Pure tone
Pure tone audiometry
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To investigate the sensitivity and specificity in an automatic computer-controlled audiometric set-up, used for screening purposes.Comparison between standardized audiometry and automated audiometry performed in the same participants.In total, 100 participants (51 females and 49 males) were recruited to take part of this study the same day they visited the hearing clinic for clinical audiometry. Ages varied between 18 and 84 years (mean 45.9 in females, 52.3 in males).The participants were divided into groups, dependent of type of hearing. A total of 23 had normal hearing, 40 had sensorineural hearing loss, 19 had conductive hearing loss and 18 showed asymmetric hearing loss. The sensitivity for the automated audiometry was 86%-100% and the specificity 56%-100%. The group with conductive hearing loss showed the poorest sensitivity (86 %) and specificity (56 %). The group with sensorineural hearing loss showed the smallest variation in difference between the two methods.The results show that automated audiometry is a method suitable to screen for hearing loss. Screening levels need to be selected with respect to cause of screening and environmental factors. For patients with asymmetric hearing thresholds it is necessary to consider the effect of transcranial routing of signals.
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High-frequency audiometry can detect early changes in auditory sensitivity resulting from processes such as aging. Nonetheless its use is still limited, and additional studies are required to establish its use, particularly among older adults.To compare pure tone thresholds for frequencies from 250 Hz to 16 kHz in young and older adults, with or without audiologic complaints.Pure tone sensitivity to 250 Hz to 16 kHz was assessed with an AC-40 audiometer in 64 adults, evenly distributed in young (25 to 35 years-old) and older (45 to 55 years-old) adults of both sexes. This is a cross-sectional study.Although all participants presented normal audiometry in frequencies from 250 Hz to 8 kHz, according to clinical parameters, older adults had significantly higher thresholds compared to young adults, according to statistical parameters, with greater significance in higher frequencies (8 to 16 kHz). Presence or absence of clinical complaints did not distinguish thresholds.The process of auditory aging, including loss of sensitivity to higher frequencies, can be detected at earlier ages than those usually investigated. High frequency audiometry is an important instrument to distinguish auditory sensitivity in young and older adults, even for those considered as audiologically normal.
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This study aimed to determine hearing thresholds in an otologically normal population without occupational noise exposure aged 18 to 64 years using extended high-frequency audiometry (EHFA).Individuals from the general population who have never had hearing problems and whose job was not associated with noise exposure were included in the study and classified by age into 5 categories: 18-24 and, further, by 10 years of age. Each of these groups was further divided according to gender. All subjects underwent tympanometry, conventional pure-tone audiometry within the 0.125-8 kHz range, and extended high-frequency audiometry within the 9-16 kHz range, performed according to the standards. The significance level for statistical testing was set at 5%.Here, we established hearing thresholds in an otologically healthy population within the extended high-frequency (EHF) range (9-16 kHz). We found the EHFA to be a highly sensitive method for early detection of hearing loss, with hearing thresholds decreasing as soon as 35 years of age. In males, the hearing thresholds grew with age more rapidly than in women. The ability to respond at EHF gradually decreased with age and increasing frequency.Our results can help improve the knowledge of EHF hearing thresholds for individual sexes and age groups. So far, the standard 7029:2017 is not binding and, moreover, it only reaches up to the frequency of 12.5 kHz. EHFA is a highly sensitive method for the evaluation of hearing loss depending on age and sex.
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The etiology of hearing misfortune is multifactorial which makes the analysis a difficult exercise and frequently an unsolved puzzle. While unadulterated tone audiometry is an obligatory examination, others, for example, research facility and radiology depend on clinical assessment. This current report's on the examination of connection between self-detailed commotion presentation amid relaxation activities and audiological indicators including measured hearing threshold levels (HTL) and tinnitus. The research was conducted by cross sectional survey of 1432 individuals from 11 to 35 years old. Methodology included of a full audiometric assessment including otoscopy, pure tone audiometry (PTA), otoacoustic emission (OAE) and tympanometry, hearing loss investigation, diagnosis, evoked response audiometry radiology, deafness.
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Objective: This study was designed to evaluate an automated pure-tone audiometric procedure (AMTAS®) for 4–8 year-old children, and a quality assessment method (QUALIND®) that predicts the accuracy of the test. Design: Children were tested with AMTAS and conventional manual air-conduction audiometry. A group of adults was tested for comparison. Study sample: Eighty-one 4–8 year-old children and 15 adults. Most had normal hearing. Results: For most subjects (93% of adults and 91% of children) differences between AMTAS and manual thresholds were similar to differences that occur when two experienced audiologists test the same subjects. QUALIND detected the inaccurate audiograms with a sensitivity of 71% and a specificity of 91%. When inaccurate audiograms identified by QUALIND are excluded, the accuracy of AMTAS is similar to the accuracy of manual audiometry. Conclusions: AMTAS produces accurate air-conduction audiograms in a high proportion of 4–8 year-old children and adults. QUALIND successfully identified most inaccurate AMTAS audiograms. The method can decrease the cost and increase efficiency and accessibility of hearing testing.SumarioObjetivo: Este estudio fue diseñado para evaluar un procedimiento automatizado de evaluación audiométrica de tonos puros (AMTAS®) para niños de 4-8 años y un método de evaluación de calidad (QUALIND™) que predice la exactitud de la prueba. Diseño: Los niños fueron evaluados con el AMTAS y con audiometría convencional manual de conducción aérea. Un grupo de adultos fue evaluado como comparación. Muestra de estudio: Ochenta y un niños de 4–8 años de edad y 15 adultos. La mayoría tenían audición normal. (“la mayoría”: COMO PUEDEN DECIR ESTO, ASI, EN UN ESTUDIO CIENTÍFICO?) Resultados: En la mayoría de los sujetos (93% de los adultos y 91% de los niños) la diferencia entre el AMTAS y los umbrales manuales fue similar a las diferencias que ocurren cuando dos audiólogos de experiencia evalúan al mismo sujeto. QUALIND detectó los audiogramas inexactos con una sensibilidad del 71% y una especificidad del 91%. Cuando se excluyen los audiogramas inexactos identificados por QUALIND, la exactitud de AMTAS es similar a la exactitud de la audiometría manual. Conclusiones: AMTAS produce audiogramas de conducción aérea exactos en una alta proporción de niños de 4–8 años de edad y en adultos. QUALIND identifica con éxito las mayor parte de los audiogramas inexactos obtenidos por AMTAS. El método puede disminuir el costo y aumentar la eficiencia y la accesibilidad para pruebas auditivas.
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Extended high-frequency (EHF) audiometry (8-16 kHz) has an important role in audiological assessments such as ototoxicity monitoring, and for speech recognition and localization. Accurate and reliable EHF testing with smartphone technologies has the potential to provide more affordable and accessible hearing-care services, especially in underserved contexts.To determine the accuracy and test-retest reliability of EHF audiometry with a smartphone application, using calibrated headphones.Air-conduction thresholds (8-16 kHz) and test-retest reproducibility, recorded with conventional audiometry (CA) and smartphone audiometry (SA), using audiometric (Sennheiser HDA 300 circumaural) and nonstandard audiometric (Sennheiser HD202 II supra-aural) headphones, were compared in a repeated-measures design.A total of 61 participants (122 ears) were included in the study. Of these, 24 were adults attending a tuberculosis clinic (mean age = 36.8, standard deviation [SD] = 14.2 yr; 48% female) and 37 were adolescents and young adults recruited from a prospective students program (mean age = 17.6, SD = 3.2 yr; 76% female). Of these, 22.3% (n = 326) of EHF thresholds were ≥25 dB HL.Threshold comparisons were made between CA and SA, with audiometric headphones and nonstandard audiometric headphones. A paired samples t-test was used for comparison of threshold correspondence between conventional and smartphone thresholds, and test-retest reproducibility of smartphone thresholds.Conventional thresholds corresponded with smartphone thresholds at the lowest intensity (10 dB HL), using audiometric and nonstandard audiometric headphones in 59.4% and 57.6% of cases, respectively. Conventional thresholds (exceeding 10 dB HL) corresponded within 10 dB or less, with smartphone thresholds in 82.9% of cases using audiometric headphones and 84.1% of cases using nonstandard audiometric headphones. There was no significant difference between CA and SA, using audiometric headphones across all frequencies (p > 0.05). Test-retest comparison also showed no significant differences between conditions (p > 0.05). Smartphone test-retest thresholds corresponded within 10 dB or less in 86.7% and 93.4% of cases using audiometric and nonstandard audiometric headphones, respectively.EHF smartphone testing with calibrated headphones can provide an accurate and reliable option for affordable mobile audiometry. The validity of EHF smartphone testing outside a sound booth as a cost-effective and readily available option to detect high-frequency hearing loss in community-based settings should be established.
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