AUDIOLOGY JAPAN
Online ISSN : 1883-7301
Print ISSN : 0303-8106
ISSN-L : 0303-8106
Volume 65, Issue 1
Displaying 1-5 of 5 articles from this issue
Original articles
  • Mako Katagiri
    2022 Volume 65 Issue 1 Pages 35-43
    Published: February 28, 2022
    Released on J-STAGE: March 18, 2022
    JOURNAL FREE ACCESS

      To elucidate the characteristics of auditory signals that deliver appropriate information to people in daily life, we conducted a survey of 90 participants of widely diverse ages. First, we compared two hearing level calculation methods for hearing measurements obtained using an audiometer. The results showed the suitability of quarter method B, in which 4kHz is added. Next, based on a 1-kHz sine wave, after the subjects listened to a test sound with weighted low and high frequencies, we evaluated the impressions of “ease of hearing” and “sound quality”. “Easy-to-hear sounds” were evaluated as “clear sounds,” irrespective of age. The results showed that sounds which are weighted in the high range are heard more easily by people in their 60s and 70s than those in their 20s. The results suggest that a complex sound design that supplements the high frequency band is effective as an effective sound, irrespective of the listener's age.

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  • Kei Sakamoto, Chie Obuchi, Han Matsuda, Atsuya Takayama, Masae Shiroma ...
    2022 Volume 65 Issue 1 Pages 44-50
    Published: February 28, 2022
    Released on J-STAGE: March 18, 2022
    JOURNAL FREE ACCESS

      In this study, we investigated the gap detection thresholds in cochlear implant (CI) users. In addition, we also determined the relationship between the gap detection threshold and speech perception in the same subjects. The gap detection thresholds were examined using an adaptive gap detection test, which consisted of one silent interval of 2-34 ms embedded in four segments of white noise. The subjects, who were all CI users, were asked to detect the gap, and we calculated the gap detection threshold in each test.

      The mean gap detection threshold was 16.4 ms (range: 8-34 ms) in the CI users. Thus, the gap detection threshold was higher in CI users, and there were large individual differences. Overall, we identified a significant correlation between the gap detection threshold and the speech perception score. However, in CI users with gap detection thresholds of 20 ms or less, no correlation was noted between the gap detection threshold and the speech perception score, and gap detection thresholds of 22 ms or greater appeared to be related to low speech perception scores.

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  • Takeshi Wakabayashi, Yamada Hiroyuki, Hisahiro Ota, Kanako Imamura, Ry ...
    2022 Volume 65 Issue 1 Pages 51-59
    Published: February 28, 2022
    Released on J-STAGE: March 18, 2022
    JOURNAL FREE ACCESS

      We examined the current status and problems in tinnitus practice at our hospital, by analyzing the data of chronic tinnitus patients obtained using the Tinnitus Sample Case History Questionnaire (TSCHQ), and by comparing the patients backgrounds in individual treatment groups. The severity of tinnitus was milder in patients who had only had one consultation than in those who had had several consultations in their various backgrounds and thus it was almost proper that the group of tinnitus patients who had only first consultation had only first consultation. In addition, some tinnitus patients who had had only one consultation had possibly some mental factors without being intervened for which they had received no intervention. Comparison of the characteristics of tinnitus patients who received sound therapy with hearing aids and those with no hearing loss who received sound therapy without hearing aids revealed that the only item that was significantly different was the tinnitus duration (months), although the degree of improvement of the Tinnitus Handicap Inventory (THI) score was significantly different between the two groups. Therefore, it was thought that the tinnitus duration might be associated with the severity of tinnitus. To further understand the clinical findings of chronic tinnitus according to subgroups, we recommend the creation of a global database.

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  • Satoshi Takano, Shuji Izumi, Tatsuya Yamagishi, Shinsuke Ohshima, Yuk ...
    2022 Volume 65 Issue 1 Pages 60-65
    Published: February 28, 2022
    Released on J-STAGE: March 18, 2022
    JOURNAL FREE ACCESS

      Paget's disease causes progressive sensorineural or mixed hearing loss. However, reports of cochlear implantation for hearing loss in patients with Paget's disease is rare. We encountered a case of Paget's disease of the bone with severe hearing loss in whom we performed cochlear implant surgery. The patient was a 66-year-old man who had suffered from bilateral progressive sen

    sorineural hearing loss from the age of 50 years. We performed right cochlear implantation, without any surgical complications. The result in the post-operative word recognition test (CI2004) was 80%. The outcome of the cochlear implant surgery was good, even though preoperative high resolution CT showed bilateral internal auditory canal stenosis; this might suggest that stenosis of the internal auditory canal might not necessarily indicate cochlear nerve dysfunction in patients with Paget's disease. Since drug therapy for Paget's disease can prevent the progression of hearing impairment, but has no effect on hearing impairment that has already developed, patients with Paget's disease presenting with severe sensorineural hearing loss could be good candidates for cochlear implantation.

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  • Harumi Arao, Ayumi Furukawa, Kaoru Katsube, Kato Yuki, Kumiko Matsumor ...
    2022 Volume 65 Issue 1 Pages 66-76
    Published: February 28, 2022
    Released on J-STAGE: March 18, 2022
    JOURNAL FREE ACCESS
      We determined, within 6 months of birth, the V-wave detection threshold for 163 ears of 82 infants who underwent click-evoked ABR and ASSR on the same day, and also examined the estimated hearing level by ASSR. There was a strong correlation between the V-wave threshold and the estimated hearing at 0.5kHz, 1kHz, 2kHz, 4kHz and the average hearing of its estimated hearing by ASSR. Out of the 105 ears with a V wave threshold of within 20dBnHL the estimated hearing by ASSR, 95 was within 35dB at all four frequencies. All three ears with a V wave threshold of 30dBnHL showed abnormalities, including mild to moderate hearing loss in one ear, and exudative otitis media in the remaining two ears. The hearing level estimated by ASSR in all 18 ears with a V-wave threshold of 40dBnHL was ≥45dB at 2 or more frequencies. Of these 18 ears, 11 showed mild to moderate hearing loss, 1 showed severe stenosis of the external auditory canal, 5 showed otitis media with effusion, and 1 ear was normal. Thus, in cases with a V-wave threshold is ≥40dBnHL, there is a high possibility of some hearing impairment, and it is necessary to quickly evaluate the hearing, including by ASSR.
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