College of Health Solutions, Arizona State University, Tempe, AZ, USA.
School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN, USA.
Int J Audiol. 2021 Mar;60(3):232-237. doi: 10.1080/14992027.2020.1822551. Epub 2020 Sep 23.
To evaluate the benefit of combined current focusing and steering to speech recognition in noise with cochlear implants (CIs).
Combined current focusing and steering was implemented using focused partial tripolar (pTP) mode with two current steering ranges. The two pTPsteering strategies were compared to a monopolar (MP) strategy without current focusing or steering and a pTP strategy with only current focusing using the Hearing in Noise Test. The strategies differed only in stimulation mode.
Ten post-lingually deafened adult CI users participated in this study.
Compared to the MP strategy, both pTPsteering strategies produced significantly better speech reception thresholds, while the pTP strategy did not. Subjects with better baseline MP performance had less improvements with the pTPsteering strategies. All four strategies were experimental low-rate strategies and none of them outperformed subjects' clinical strategies.
Speech recognition in noise was better with the pTPsteering strategies than with the MP strategy, but the effect of pTP-mode current steering on spectral resolution is yet to be tested.
评估在噪声环境下，利用耳蜗植入物（CIs）进行联合电流聚焦和导向对语音识别的益处。
使用具有两个电流转向范围的聚焦部分三角（pTP）模式实现联合电流聚焦和导向。将两种 pTP 转向策略与不具有电流聚焦或转向的单极（MP）策略以及仅使用听力测试的噪声中的 pTP 策略进行比较。策略仅在刺激模式上有所不同。
10 名后天失聪的成年 CI 用户参与了这项研究。
与 MP 策略相比，两种 pTP 转向策略都显著提高了语音识别阈值，而 pTP 策略则没有。具有更好基线 MP 性能的受试者在 pTP 转向策略中的改善较小。所有四种策略均为实验性低速率策略，没有一种策略优于患者的临床策略。
在噪声环境下，语音识别效果优于 MP 策略，但 pTP 模式电流转向对频谱分辨率的影响仍有待测试。
