Head Shadow, Summation, and Squelch in Bilateral Cochlear-Implant Users With Linked Automatic Gain Controls.
Head Shadow, Summation, and Squelch in Bilateral Cochlear-Implant Users With Linked Automatic Gain Controls.
复制标题
DOI：
10.1177/23312165211018147
复制
发表时间：
2021-01
影响因子：
2.7
通讯作者：
Goupell MJ
中科院分区：
文献类型：
--
作者：
Bakal TA;Milvae KD;Chen C;Goupell MJ
与听力正常的人相比，双侧耳蜗植入（BICI）用户在噪声中的言语理解较差。独立的自动增益控制（AGC）可能有助于这一点，因为独立地调整处理器增益可以减少BICI听众依赖于双边利益的耳间电平差异。双侧连接的AGCs可以通过增加耳间水平差异的大小来改善双侧益处。在九个BICI用户的双边利益（总和，头影，和静噪）的影响进行了测量。在0°、90°或−90°方位角的单个说话者掩蔽0°的目标说话者的言语理解在耳机下进行评估，其中句子具有五个目标与掩蔽者比率。研究处理器用于操纵AGC类型（独立或链接）和测试耳（左，右，或两者）。句子回忆在安静的情况下进行测量，以量化个体功能表现的耳间不对称性。结果表明，AGC类型并没有显着改变性能或双边利益。然而，耳间功能不对称与耳朵相互作用，使得当有较大的功能不对称时，发生较大的求和和静噪益处，并且与更大的位置相互作用，使得当有较大的功能不对称时，发生较小的头影益处。对于那些不对称性较大的人来说，更大的好处是由于增加了性能更好的耳朵而带来的改善，而不是真正的双耳听力好处。总之，链接的AGC没有显着改变双边利益的情况下，语音对语音掩蔽与单说话者掩蔽，但也没有强烈的损害范围内的目标，掩蔽比，在一个小而多样化的BICI听众人口。
Speech understanding in noise is poorer in bilateral cochlear-implant (BICI) users compared to normal-hearing counterparts. Independent automatic gain controls (AGCs) may contribute to this because adjusting processor gain independently can reduce interaural level differences that BICI listeners rely on for bilateral benefits. Bilaterally linked AGCs may improve bilateral benefits by increasing the magnitude of interaural level differences. The effects of linked AGCs on bilateral benefits (summation, head shadow, and squelch) were measured in nine BICI users. Speech understanding for a target talker at 0° masked by a single talker at 0°, 90°, or −90° azimuth was assessed under headphones with sentences at five target-to-masker ratios. Research processors were used to manipulate AGC type (independent or linked) and test ear (left, right, or both). Sentence recall was measured in quiet to quantify individual interaural asymmetry in functional performance. The results showed that AGC type did not significantly change performance or bilateral benefits. Interaural functional asymmetries, however, interacted with ear such that greater summation and squelch benefit occurred when there was larger functional asymmetry, and interacted with interferer location such that smaller head shadow benefit occurred when there was larger functional asymmetry. The larger benefits for those with larger asymmetry were driven by improvements from adding a better-performing ear, rather than a true binaural-hearing benefit. In summary, linked AGCs did not significantly change bilateral benefits in cases of speech-on-speech masking with a single-talker masker, but there was also no strong detriment across a range of target-to-masker ratios, within a small and diverse BICI listener population.
登录
查看更多内容
影响因子：
3.7
作者：
Goupell MJ;Gaskins CR;Shader MJ;Walter EP;Anderson S;Gordon-Salant S
通讯作者：
Gordon-Salant S
影响因子：
2.7
作者：
Baumgärtel RM;Hu H;Krawczyk-Becker M;Marquardt D;Herzke T;Coleman G;Adiloğlu K;Bomke K;Plotz K;Gerkmann T;Doclo S;Kollmeier B;Hohmann V;Dietz M
通讯作者：
Dietz M
影响因子：
3.7
作者：
Dieudonne, Benjamin;Francart, Tom
通讯作者：
Francart, Tom
影响因子：
2.4
作者：
Freyman, Richard L.;Balakrishnan, Uma;Helfer, Karen S.
通讯作者：
Helfer, Karen S.
影响因子：
2.4
作者：
Aronoff, Justin M.;Yoon, Yang-soo;Soli, Sigfrid D.
通讯作者：
Soli, Sigfrid D.