https://scholars.lib.ntu.edu.tw/handle/123456789/474540
標題: | External ear resonance in patients with tympanic membrane perforations | 作者: | TIEN-CHEN LIU Hsu C.-J. |
關鍵字: | External ear resonance; Tympanic membrane perforation | 公開日期: | 1999 | 卷: | 24 | 期: | 3 | 起(迄)頁: | 216-219 | 來源出版物: | Clinical Otolaryngology and Allied Sciences | 摘要: | This study investigated the effects of a tympanic membrane perforation on the external ear resonance. Measurements of external ear resonance using a probe-tube microphone system were performed in 14 patients who had medium to large unilateral tympanic membrane perforations. The contralateral normal ears of these 14 patients served as control. The results showed that, there were no significant differences in the peak frequency, peak amplitude and peak sharpness between perforated and normal ears. However, intersubject variability in the resonant frequency was greater in the perforated group. In addition, the resonance curves of these two groups were substantially different. In 10 out of the 14 patients in the perforated group, the resonance curves showed 2-3 prominent peaks separated by valleys of about 10 dB reduced gain. In addition, in 11 out of 14 perforated ears, reduced responses (3.8 dB in average) occurred consistently in the lower frequency region (0.3-2 kHz). Clinically, the abnormal external ear resonance and the larger intersubject variation must be taken into consideration in fitting hearing aids for this group of patients. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-0033006346&doi=10.1046%2fj.1365-2273.1999.00250.x&partnerID=40&md5=e60850ce268b66c902aa305e5a97d904 https://scholars.lib.ntu.edu.tw/handle/123456789/474540 |
ISSN: | 0307-7772 | DOI: | 10.1046/j.1365-2273.1999.00250.x | SDG/關鍵字: | adolescent; adult; aged; article; clinical article; controlled study; eardrum perforation; external ear; hearing aid; human; measurement; microphone; priority journal; Acoustic Stimulation; Adolescent; Adult; Aged; Ear, External; Hearing Aids; Hearing Disorders; Humans; Middle Aged; Tympanic Membrane Perforation |
顯示於: | 醫學系 |
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