Tone Decay and Hearing Threshold Level in Sensorineural Loss

1971 ◽  
Vol 14 (2) ◽  
pp. 345-349
Author(s):  
Donald G. Doehring ◽  
Linda P. Swisher
Keyword(s):  
Hearing Threshold ◽  
Threshold Level ◽  
Threshold Effects ◽  
Frequency Effects ◽  
Tone Decay ◽  
Retrocochlear Pathology ◽  
Sensorineural Loss

Tone decay was assessed by the Bekesy and modified Rosenberg procedures in audiological patients with sensorineural-type loss for whom there was no neurological evidence of retrocochlear pathology. Thirty-five subjects were tested at 500 Hz, 97 at 2000 Hz, and 92 at 4000 Hz. Tone decay tended to increase with increased hearing threshold level for both tests at all three frequencies, with low but significant correlations at two of the three frequencies for each test. There were no systematic differences between the Bekesy and modified Rosenberg procedures with regard to overall level, frequency effects, or hearing threshold effects. A low but significant correlation was obtained between the two procedures at all three frequencies.

scholarly journals Functional dysacusis: The utilization of EEG activity in the determination of hearing threshold level, a case report

1973 ◽  
Vol 20 (1) ◽  
Author(s):  
I. Hay
Keyword(s):  
Case Report ◽  
Hearing Threshold ◽  
Threshold Level ◽  
Electric Response ◽  
Test Results ◽  
Eeg Activity ◽  
Cortical Responses ◽  
The Right ◽  
Response Testing

A case of functional dysacusis was subjected to routine as well as electric response testing. Test results were unreliable and electrical cortical responses to stimuli delivered to the right ear were so poor that the results could not be utilized. A marked difference between the raw EEG tracings was observed when stimuli were switched between left to right ears. This fact was eventually used to determine the hearing threshold level of the right ear.

scholarly journals The correlation between plasma reactive oxygen species and hearing threshold levels in presbycusis patients

2019 ◽  
Vol 49 (1) ◽  
pp. 19
Author(s):  
Nyilo Purnami ◽  
Anita Nuraini ◽  
Bakti Surarso
Keyword(s):  
Reactive Oxygen Species ◽  
Hearing Threshold ◽  
Reactive Oxygen ◽  
Clinical Pathology ◽  
Threshold Level ◽  
Oxygen Species ◽  
Correlation Pattern ◽  
Cross Sectional ◽  
Threshold Levels ◽  
Consecutive Sampling

Background: Presbycusis is a hearing loss due to the degeneration process in elderly people of 65 years old and beyond, characterized by a decrease in hearing sensitivity in both ears. Reactive oxygen species (ROS) are assumed to have an important role in the pathogenesis of presbycusis. Purpose: To find out the correlation between ROS levels in plasma and hearing threshold levels in presbycusis patients. Method: The design was cross sectional and conducted at the Outpatient Clinic of Neurotology Division, Geriatric Clinic, Clinical Pathology Installation, and Central Installation of Biomaterials Network Bank of Dr. Soetomo Hospital. Samples were taken by consecutive sampling for audiometric examination and measurement of ROS levels in plasma. Results: Fifty samples were collected, ROS levels in plasma were found with mean (SD) of 2.46 ng/ml (0.84). The mean hearing threshold level was 47.70 dB (12.42). The Pearson statistical test revealed a significant correlation between ROS levels in plasma and hearing threshold levels, with p=0.003 (p<0.05), and the correlation coefficient (r) 0.41. Conclusion: There was a correlation between ROS in plasma and hearing threshold levels in presbycusis patients, with a significant moderate-positive correlation pattern. It indicated that the higher the ROS levels in plasma, the higher the hearing threshold levels in presbycusis patients. Latar belakang: Presbikusis adalah gangguan pendengaran akibat proses degenerasi yang dijumpai pada usia 65 tahun atau lebih, ditandai oleh penurunan kepekaan pendengaran pada kedua telinga. Reactive oxygen species (ROS) diduga mempunyai peran penting pada patogenesis  presbikusis. Tujuan: Untuk mengetahui hubungan antara kadar ROS dalam plasma dengan nilai ambang dengar pada penderita presbikusis. Metode: Penelitian ini adalah cross sectional, dilakukan di Unit Rawat Jalan (URJ) THT-KL Divisi Neurotologi, URJ Geriatri, Instalasi Patologi Klinik, dan Instalasi Pusat Biomaterial Bank Jaringan RSUD Dr. Soetomo. Sampel diambil secara consecutive sampling. Diperoleh 50 sampel untuk dilakukan pemeriksaan audiometri dan pengukuran kadar ROS dalam plasma. Hasil: Kadar ROS dalam plasma didapatkan hasil rerata (SD) 2,46 ng/ml (0,84). Nilai ambang dengar didapatkan hasil rerata (SD) 47,70 dB (12,42). Hasil uji statistik dengan korelasi Pearson terhadap kadar ROS dalam plasma dan nilai ambang dengar didapatkan hasil koefisien korelasi (r) sebesar 0,41 dan p=0,003 (p<0,05). Kesimpulan: Terdapat hubungan antara kadar ROS dalam plasma dengan nilai ambang dengar pada penderita presbikusis dengan pola hubungan bersifat positif-sedang yang signifikan, yang berarti semakin tinggi kadar ROS dalam plasma, semakin tinggi nilai ambang dengar.

Correlates of Syntactic Abilities in Hearing-Impaired Students

1981 ◽  
Vol 24 (1) ◽  
pp. 48-54 ◽  
Author(s):  
B. R. Clarke ◽  
W. Todd Rogers
Keyword(s):  
Hearing Threshold ◽  
Threshold Level ◽  
Educational Programs ◽  
Hearing Impaired ◽  
Stepwise Multiple Regression ◽  
Educational Setting ◽  
Regression Analyses ◽  
Personal Variables ◽  
Level Number ◽  
Effect Of Age

Total scores on the recently developed Screening Test from the Test of Syntactic Abilities for 382 hearing-impaired subjects between eight and 19 years and in various educational programs were found to be significantly related to hearing threshold level, number of multiple handicaps, age, educational setting, method of communication, and hearing aid usage. Multivariate analysis of variance on the effect of age controlled for hearing toss showed no significant increase in scores after eleven years of age, thus lending support to the thesis that the capacity to acquire language may cease to function at about puberty. The results of stepwise multiple regression analyses showed that, when personal variables were first forced to enter the equation, degree of hearing loss, multiple handicaps, and age accounted for 14%., nine %, and four % of the explained variability, respectively. Over and above these contributions, two manipulable variables—educational setting (a surrogate for integration) and method of communication--added significantly a further 12% and three % to the explained variability in syntactic ability.

scholarly journals Correlation of malondialdehyde and hearing threshold level at frequency 4000 Hz post gunshot exposure

2020 ◽  
Vol 50 (1) ◽  
pp. 1
Author(s):  
Nyilo Purnami ◽  
Fauzi Helmi ◽  
Sri Herawati
Keyword(s):  
Random Sampling ◽  
Statistical Tests ◽  
Pearson Correlation ◽  
Hearing Threshold ◽  
Secondary Data ◽  
Simple Random Sampling ◽  
Threshold Level ◽  
Acoustic Trauma ◽  
Cross Sectional ◽  
Frequency Threshold

Background: The incidence of acoustic trauma after gunshot exposure in students of the SekolahPolisi Negara (SPN) is quite high. Malondialdehyde (MDA) is a compound that can portray oxidativestress due to free radicals. The correlation between the levels of MDA and the hearing threshold frequencypost gunshot exposure could be used as the base for administering antioxidants to prevent acoustictrauma. Objective: To find out the correlation between the levels of MDA and the hearing thresholdfrequency post gunshot exposure, in East Java SPN students. Method: An observational analytic studywith a retrospective cross sectional approach using secondary data of medical records of the East JavaSPN students batch 2017/2018. The samples were selected by simple random sampling. Result: Out of50 students, the mean of age was 19.62 years. All samples were male with mean 559.17 and standarddeviation (SD) 959.86. The calculation of the 4000 Hz frequency threshold value obtained an averagevalue of 31.52 and SD of 13.4. Hearing loss complaint was found in 1 student (2%). No complaints oftinnitus and vertigo were found. Statistical tests with Pearson correlation between serum MDA levels and4000 Hz frequency threshold values showed a correlation coefficient (r) of 0.74 and p = 0.00 (p<0.05).Conclusion: There was a significant correlation between MDA levels and the hearing threshold at 4000Hz frequency after gunshot exposure in East Java SPN students.Keywords: acoustic trauma, malondialdehyde, hearing threshold level at frequency 4000 HzABSTRAKLatar belakang: Insiden trauma akustik pasca pajanan letusan senjata api pada siswa Sekolah PolisiNegara (SPN) cukup tinggi. Malondialdehid (MDA) merupakan senyawa yang dapat menggambarkanstres oksidatif akibat radikal bebas. Adanya hubungan antara kadar MDA dengan nilai ambang dengarfrekuensi 4000 Hertz (Hz) dapat menjadi dasar pemberian antioksidan untuk pencegahan traumaakustik. Tujuan: Membuktikan hubungan antara kadar MDA dengan nilai ambang dengar frekuensi4000 Hz pasca pajanan letusan senjata api pada siswa SPN Jawa Timur. Metode: Penelitian ini adalahobservasional analitik dengan pendekatan retrospektif cross sectional menggunakan data sekunderberupa rekam medik siswa SPN Jawa Timur angkatan 2017/2018. Sampel dipilih secara simple random sampling. Hasil: Dari 50 siswa, usia rerata adalah 19,62 tahun. Seluruh sampel penelitian adalah laki-laki, rerata=559,17 dan standar deviasi (SD)=959,86. Penghitungan nilai ambang dengar frekuensi 4000 Hz didapatkan hasil nilai rerata=31,52 dan SD=13,4 Keluhan penurunan pendengaran hanya dijumpai pada 1 siswa (2%). Uji statistik dengan korelasi Pearson antara kadar MDA dalam serum dengan nilai ambang dengar frekuensi 4000 Hz didapatkan hasil koefisien korelasi (r) sebesar 0,74 dan p = 0,00 (p<0,05). Kesimpulan: Terdapat hubungan yang signifikan antara kadar MDA dengan nilai ambang dengar frekuensi 4000 Hz pasca pajanan letusan senjata api pada siswa SPN Jawa Timur.Kata kunci: trauma akustik, malondialdehid, nilai ambang dengar frekuensi 4000 Hz

scholarly journals Threshold Effects of Import Dependence on Economic Growth in Nigeria

2021 ◽  
Vol 15 (2) ◽  
pp. 198-219
Author(s):  
Oziengbe Scott AIGHEYISI
Keyword(s):  
Economic Growth ◽  
Least Squares ◽  
Threshold Model ◽  
Threshold Level ◽  
Ordinary Least Squares ◽  
Growth Effect ◽  
Series Data ◽  
Threshold Effects ◽  
Long Run ◽  
The Relationship

This study uses annual time series data spanning 1981–2018 to investigate the threshold effects of import dependence on economic growth in Nigeria. The ordinary least squares (OLS) and the fully modified OLS (FMOLS) techniques are employed for estimation of a quadratic regression model to determine the nature of the relationship between aggregate import dependence and economic growth. It is found that the relationship is concave, that is, it follows an inverted-U shape. The conditional least squares estimator is thereafter employed to estimate the threshold model specified to determine the threshold level of import dependence. The study finds a threshold level of 26% for aggregate import dependence. Below this threshold, import dependence positively affects economic growth; above the threshold, the growth effect of import dependence is adverse. Furthermore, it is found that the long-run growth effect of Inflation is adverse, and investment is favourable to long-run economic growth. Based on these findings, the paper recommends efforts by Nigeria’s government to reduce import dependence below the estimated threshold of 26%, control inflation and encourage investment so as to enhance the growth of the nation’s economy.

scholarly journals The Influence of Selected Risk Factors on the Hearing Threshold Level of Noise Exposed Employees

2010 ◽  
Vol 35 (3) ◽  
Author(s):  
Adam Dudarewicz ◽  
Esko Toppila ◽  
Małgorzata Pawlaczyk-Łuszczyńska ◽  
Mariola Śliwińska-Kowalska
Keyword(s):  
Risk Factors ◽  
Hearing Threshold ◽  
Threshold Level
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