Gyo K, Saiki T, Yanagihara N
Department of Otolaryngology, Ehime University School of Medicine, Japan.
Audiology. 1996 Sep-Oct;35(5):271-6. doi: 10.3109/00206099609071947.
The speech discrimination provided by a piezoelectric implantable hearing aid (IHA) was compared to that by a conventional hearing aid (CHA) using speech audiometric studies in seven patients. Recognition of monosyllabic and bisyllabic words was measured using word lists recorded on a compact disc with and without background noise. the intensity of speech sound was 65 dB SPL, while that of background noises varied from 65 to 75 dB SPL. The ear canal opposite the test ear was closed with a clay mold to avoid perception of the test sound through the contralateral ear. On monosyllabic test without noise, speech discrimination scores by the IHA and the CHA showed no significant difference. However, with noise of 65 dB SPL, the IHA outperformed the CHA. When the intensity of the noise increased to 70 or 75 dB SPL, the scores by both devices decreased, but a significant difference was noted between the two. On the bisyllabic test, the results were almost identical with those on the monosyllabic test. These findings indicate that speech recognition by the IHA was superior to that by CHA under noisy circumstances.
通过对7名患者进行言语听力测试研究，比较了压电式植入式助听器（IHA）和传统助听器（CHA）的言语辨别能力。使用录制在光盘上的单词列表，在有和没有背景噪声的情况下测量单音节和双音节单词的识别情况。语音的强度为65 dB SPL，而背景噪声的强度在65至75 dB SPL之间变化。用粘土模具封闭测试耳对侧的耳道，以避免通过对侧耳感知测试声音。在无噪声的单音节测试中，IHA和CHA的言语辨别得分无显著差异。然而，在65 dB SPL的噪声环境下，IHA的表现优于CHA。当噪声强度增加到70或75 dB SPL时，两种设备的得分均下降，但两者之间存在显著差异。在双音节测试中，结果与单音节测试几乎相同。这些发现表明，在嘈杂环境下，IHA的言语识别能力优于CHA。
