电听的音调歧视与不一致和一致的振幅调制和脉冲间速率线索
Martin J Lindenbeck1, Piotr Majdak1, Sridhar Srinivasan1
1Acoustics Research Institute, Austrian Academy of Sciences, Wohllebengasse 12-14, A-1040 Vienna, Austria.
The Journal of the Acoustical Society of America
|June 12, 2023
概括
耳植入物使用者在杂的环境中扎着听力. 这项研究发现,短脉冲间隔速率 (SIPI) 主要影响音调感知,即使与幅度调制 (AM) 速率不一致.
科学领域:
- 听觉神经科学 听觉神经科学
- 助听器中的信号处理
背景情况:
- 耳植入物 (CI) 用户在杂的环境中面临挑战,原因是无法获得关键的时间线索,例如间隔时间差 (ITD).
- 研究了振幅调制 (AM) 和短脉冲间隔 (SIPI) 脉冲列车,以提高CI的时间提示灵敏度.
研究的目的:
- 调查 AM 和 SIPI 费率对 CI 用户的歧视的感知贡献.
- 了解SIPI和AM速率如何相互作用并影响音调感知,特别是在相互矛盾的暗示条件下.
主要方法:
- 五名耳植入器使用者参与了这项研究.
- 使用振幅调节的高频脉冲列车,使用不同的SIPI和AM速率测试了音调区分.
- 用两个AM深度 (0.1和0.5) 来评估它们的影响.
主要成果:
- 发现SIPI率是影响音调感知的主导线索,无论AM和SIPI线索是否一致或不一致.
- 广播频率也对音调感知有所贡献,但只有当广播深度很大,线索不一致时.
结论:
- 对于CI用户来说,SIPI速率在音调感知中起着比AM速率更重要的作用.
- 结果表明,仔细考虑SIPI和AM速率相互作用对于开发未来的混合速率刺激策略至关重要,以改善CI的时间距和ITD灵敏度.
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