Korean journal of audiology最新文献_第6页

Analysis of Factors Affecting Output Levels and Frequencies of MP3 Players. 影响 MP3 播放器输出电平和频率的因素分析

Korean journal of audiology Pub Date : 2013-09-01 Epub Date: 2013-09-24 DOI: 10.7874/kja.2013.17.2.59

Jinsook Kim

{"title":"Analysis of Factors Affecting Output Levels and Frequencies of MP3 Players.","authors":"Jinsook Kim","doi":"10.7874/kja.2013.17.2.59","DOIUrl":"10.7874/kja.2013.17.2.59","url":null,"abstract":"Exposure to high levels of music that could lead to music induced hearing loss (MIHL) has been of recent interest especially for young adults, considering their excessive use of personal listening devices such as MP3 player. More attention should be drawn to MIHL for noting that early noise exposure leads to earlier onset of presbycusis. In search of appropriate and safe listening habits for young adults, this investigation was aimed to evaluate output levels and frequencies generated by the Samsung galaxy note MP3 player depending on two earphone types; ear-bud and over-the-ear earphones and three music genres; rock, hip-hop, ballade. A sound level meter was used to measure output level and frequency spectrum between 12.5 and 16000 Hz at all 1/3-octave bands. The following results can be summarized. 1) The earphone styles did not produce significant difference in output levels, but the music genres did. However, the results of music genres varied. 2) Neither earphone styles nor music genres produced significant difference in frequency response spectrum, except music genres at the volume settings we usually listen to. Additionally, volume levels should be lower than 50% for usual listening situation. Through this investigation, it was noted that the frequency range was substantial between 50 and 1000 Hz regardless of the styles of earphones and music genres, implying that we should be cautious of this frequency range when we listen to music. Researchers should give more attention to the effects of the mixture of output level and frequency spectrum, considering that the auditory system has frequency specificity from the periphery to the central to provide refined methods for protecting our ears from MIHL. ","PeriodicalId":90252,"journal":{"name":"Korean journal of audiology","volume":"17 2","pages":"59-64"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/8e/81/kja-17-59.PMC3936544.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32196907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of age-related hearing loss. 年龄相关性听力损失的评估。

Korean journal of audiology Pub Date : 2013-09-01 Epub Date: 2013-09-24 DOI: 10.7874/kja.2013.17.2.50

Tae Su Kim, Jong Woo Chung

引用次数: 34

Solitary metastasis of gastric carcinoma to the cerebellopontine angle. 胃癌单发转移至桥小脑角。

Korean journal of audiology Pub Date : 2013-09-01 Epub Date: 2013-09-24 DOI: 10.7874/kja.2013.17.2.94

Dong-Wook Lim, Eun-Young Kim, Kyu-Sung Kim, Ho-Seok Choi

引用次数: 4

Development of animal models of otitis media. 中耳炎动物模型的建立。

Korean journal of audiology Pub Date : 2013-04-01 Epub Date: 2013-04-16 DOI: 10.7874/kja.2013.17.1.9

Moo Kyun Park, Byung Don Lee

引用次数: 10

Clinical characteristics of labyrinthine concussion. 迷路震荡的临床特点。

Korean journal of audiology Pub Date : 2013-04-01 Epub Date: 2013-04-16 DOI: 10.7874/kja.2013.17.1.13

Mi Suk Choi, See-Ok Shin, Je Yeob Yeon, Young Seok Choi, Jisung Kim, Soo Kyoung Park

{"title":"Clinical characteristics of labyrinthine concussion.","authors":"Mi Suk Choi, See-Ok Shin, Je Yeob Yeon, Young Seok Choi, Jisung Kim, Soo Kyoung Park","doi":"10.7874/kja.2013.17.1.13","DOIUrl":"https://doi.org/10.7874/kja.2013.17.1.13","url":null,"abstract":"Background and objectives: Inner ear symptoms like hearing loss, dizziness or tinnitus are often developed after head trauma, even in cases without inner ear destruction. This is also known as labyrinthine concussion. The purpose of this study is to determine the clinical manifestations, characteristics of audiometry and prognostic factors of these patients.Materials and methods: We reviewed the medical records of the 40 patients that had been diagnosed as labyrinthine concussion from 1996 to 2007. We studied the hearing levels in each frequency and classified them according to type and degree of hearing loss. Rates of hearing improvement were evaluated according to age, sex, hearing loss type, degree and presence of dizziness or tinnitus. To find out any correlation between hearing improvement and these factors, we used χ(2) test or Fisher's exact test.Results: Bilateral hearing loss was observed in 22 patients, and unilateral hearing loss in 18 patients. There were 4 (6.5%) ascending, 34 (54.8%) descending, 24 (38.7%) flat type hearing loss, which indicated hearing loss was greater in high frequencies than low frequencies. Among 62 affected ears, 20 (32.3%) gained improvement, and it was achieved mainly in low frequencies. There were only 2 ears with dizziness in 20 improved ears and among 20 dizziness accompanied ears, also only 2 ears were improved.Conclusions: High frequencies are more vulnerable to trauma than low frequencies. The hearing gain is obtained mainly in low frequencies, and association with dizziness serves poor prognosis.","PeriodicalId":90252,"journal":{"name":"Korean journal of audiology","volume":"17 1","pages":"13-7"},"PeriodicalIF":0.0,"publicationDate":"2013-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.7874/kja.2013.17.1.13","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32197034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 24

A case of subcutaneous hemangioma presenting as a preauricular sinus. 以耳前窦为表现的皮下血管瘤1例。

Korean journal of audiology Pub Date : 2013-04-01 Epub Date: 2013-04-16 DOI: 10.7874/kja.2013.17.1.32

Sang-Gyun Jin, Min-Ju Kim, Jung-Mi Park, Kyoung-Ho Park

引用次数: 3

Korean journal of audiology Pub Date : 2013-04-01 Epub Date: 2013-04-16 DOI: 10.7874/kja.2013.17.1.1

Jae Hee Lee

{"title":"Age-related deficits in the processing of fundamental frequency differences for the intelligibility of competing voices.","authors":"Jae Hee Lee","doi":"10.7874/kja.2013.17.1.1","DOIUrl":"https://doi.org/10.7874/kja.2013.17.1.1","url":null,"abstract":"A common complaint of older listeners is that they can hear speech, yet cannot understand it, especially when listening to speech in a background noise. When target and competing speech signals are concurrently presented, a difference in the fundamental frequency (ΔF0) between competing speech signals, which determines the pitch of voice, can be an important and commonly occurring cue to facilitate the separation of the target message from the interfering message, consequently improving intelligibility of the target message. To address the question of whether the older listeners have reduced ability to use ΔF0 and how the age-related deficits in the processing of ΔF0 are theoretically explained, this paper is divided into three parts. The first part of this article summarizes how the speech-communication difficulties that older listeners have are theoretically explained. In the second part, literatures on the perceptual benefits from ΔF0 and the age-related deficits on the use of ΔF0 are reviewed. As a final part, three theoretical models explaining the general processing of ΔF0 are compared to discuss which better explains the age-related deficits in the processing of ΔF0. ","PeriodicalId":90252,"journal":{"name":"Korean journal of audiology","volume":"17 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2013-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/16/3c/kja-17-1.PMC3936522.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32197032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Clinical manifestation and prognosis of vestibular migraine according to the vestibular function test results. 根据前庭功能检查结果分析前庭偏头痛的临床表现及预后。

Korean journal of audiology Pub Date : 2013-04-01 Epub Date: 2013-04-16 DOI: 10.7874/kja.2013.17.1.18

Jae-Wook Lee, Jae Yun Jung, You Sun Chung, Myung-Whan Suh

{"title":"Clinical manifestation and prognosis of vestibular migraine according to the vestibular function test results.","authors":"Jae-Wook Lee, Jae Yun Jung, You Sun Chung, Myung-Whan Suh","doi":"10.7874/kja.2013.17.1.18","DOIUrl":"https://doi.org/10.7874/kja.2013.17.1.18","url":null,"abstract":"Background and objectives: ACCORDING TO PREVIOUS REPORTS, PATIENTS WITH VESTIBULAR MIGRAINE (VM) DISPLAY VARIABLE RESULTS FROM VESTIBULAR FUNCTION TESTS (VFT): central, peripheral, or normal. The aim of this study was to classify the VM patients into the three groups according to interictal VFT findings (central, peripheral or normal) and to clarify the relationship between VFT results and the clinical manifestations and prognosis in each group.Subjects and methods: We reviewed the medical records of 81 patients diagnosed as VM using the criteria of Neuhauser, et al. between December 2004 and June 2009. Patients were divided into three groups according to the results of VFT. We compared the clinical manifestations and prognosis between groups. Characteristics including dizziness, the nature of headache, associated otologic symptoms, hearing threshold, duration of illness, and recovery time were analyzed.Results: The number of patients with central, peripheral vestibular dysfunction and normal finding in VFT were 15, 28, and 38 respectively. There were no significant differences in the nature of headache, associated otologic symptoms, hearing threshold, duration of illness, and recovery time. A small difference was observed in the mean age and characteristics of dizziness, but these were not significant.Conclusions: In patients with VM, classification according to the type of vestibular dysfunction was not helpful in the prediction of prognosis and clinical manifestations.","PeriodicalId":90252,"journal":{"name":"Korean journal of audiology","volume":"17 1","pages":"18-22"},"PeriodicalIF":0.0,"publicationDate":"2013-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/ed/68/kja-17-18.PMC3936516.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32197035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

A case of bilateral sudden hearing loss and tinnitus after salicylate intoxication. 水杨酸中毒后双侧突发性听力丧失伴耳鸣1例。

Korean journal of audiology Pub Date : 2013-04-01 Epub Date: 2013-04-16 DOI: 10.7874/kja.2013.17.1.23

Sang Min Kim, Joon-Man Jo, Moo Jin Baek, Kyu Hwan Jung

引用次数: 7

Wegener's granulomatosis presenting as bilateral otalgia with facial palsy: a case report. 韦格纳肉芽肿病表现为双侧耳痛伴面瘫1例。

Korean journal of audiology Pub Date : 2013-04-01 Epub Date: 2013-04-16 DOI: 10.7874/kja.2013.17.1.35

Jeong Hyun Lee, Kun Woo Kim, Na Hye Myong, Jae Yun Jung

引用次数: 6