Picou Erin M, Ricketts Todd A
Vanderbilt University Medical Center, Nashville, TN.
J Am Acad Audiol. 2013 Jan;24(1):59-70. doi: 10.3766/jaaa.24.1.7.
Understanding speech over the telephone when listening in noisy environments may present a significant challenge for listeners with moderate-to-severe hearing loss.
The purpose of this study was to compare speech recognition and subjective ratings across several hearing aid-based telephone listening strategies for individuals with moderate-to-severe sensorineural hearing loss.
Speech recognition and subjective ratings were evaluated for a simulated telephone signal. The strategies evaluated included acoustic telephone, unilateral telecoil, unilateral wireless streaming, and bilateral wireless streaming. Participants were seated in a noisy room for all evaluations.
Eighteen adults, aged 49-88 yr, with moderate-to-severe sensorineural hearing loss participated.
Speech recognition scores on the Connected Speech Test were converted to rationalized arcsine units and analyzed using analysis of variance testing and Tukey post hoc analyses. Subjective ratings of ease and comfort were also analyzed in this manner.
Speech recognition performance was poorest with acoustic coupling to the telephone and best with bilateral wireless routing. Telecoil coupling resulted in better speech recognition performance than acoustic coupling, but was significantly poorer than bilateral wireless routing. Furthermore, unilateral wireless routing and telecoil coupling generally led to similar speech recognition performance, except in lower-level background noise conditions, for which unilateral routing resulted in better performance than the telecoil.
For people with moderate-to-severe sensorineural hearing loss, acoustic telephone listening with a hearing aid may not lead to acceptable performance in noise. Although unilateral routing options (telecoil and wireless streaming) improved performance, speech recognition performance and subjective ratings of ease and comfort were best when bilateral wireless routing was used. These results suggest that wireless routing is a potentially beneficial telephone listening strategy for listeners with moderate-to-severe hearing loss who are fitted with limited venting if the telephone signal is routed to both ears. Unilateral wireless routing may provide similar benefits to traditional unilateral telecoil. However, the newer wireless systems may have the advantage for some listeners in that they do not include some of the positioning constraints associated with telecoil use.
对于中重度听力损失的聆听者而言，在嘈杂环境中通过电话理解语音可能是一项重大挑战。
本研究的目的是比较中重度感音神经性听力损失个体使用几种基于助听器的电话聆听策略时的语音识别和主观评分。
对模拟电话信号进行语音识别和主观评分评估。评估的策略包括声学电话、单侧感应线圈、单侧无线传输和双侧无线传输。所有评估中，参与者均坐在嘈杂的房间里。
18名年龄在49 - 88岁之间的中重度感音神经性听力损失成年人参与了研究。
将连接语音测试中的语音识别分数转换为合理化反正弦单位，并使用方差分析测试和Tukey事后分析进行分析。轻松度和舒适度的主观评分也以这种方式进行分析。
通过声学方式连接电话时语音识别表现最差，而双侧无线传输时最佳。感应线圈连接的语音识别表现优于声学连接，但明显不如双侧无线传输。此外，单侧无线传输和感应线圈连接通常导致相似的语音识别表现，除了在较低背景噪声条件下，此时单侧传输的表现优于感应线圈。
对于中重度感音神经性听力损失的人来说，使用助听器通过声学方式聆听电话在噪声环境中可能无法获得可接受的表现。虽然单侧传输选项（感应线圈和无线传输）提高了表现，但使用双侧无线传输时语音识别表现以及轻松度和舒适度的主观评分最佳。这些结果表明，如果电话信号传输到双耳，对于佩戴有限通气装置的中重度听力损失聆听者而言，无线传输是一种潜在有益的电话聆听策略。单侧无线传输可能与传统单侧感应线圈有类似的益处。然而，较新的无线系统可能对一些聆听者具有优势，因为它们不存在与感应线圈使用相关的一些定位限制。
