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Updated: Jun 29, 2025

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通过激光诱导的非线性光声学对人类圆窗的声学刺激
Liza Lengert1,2, Michael Tomanek3, Mohammad Ghoncheh3
1Laser Zentrum Hannover E.V., Hollerithallee 8, 30419, Hannover, Germany.
Scientific reports
|April 8, 2024
概括
研究人员使用激光诱导的光声学效应在内耳中演示了低频纯色调的产生. 这种方法可以为需要低频声音的耳植入患者提供声学刺激.
科学领域:
- 生物医学工程 生物医学工程
- 声学 声学 在声学方面
- 眼科医生 眼科 眼科
背景情况:
- 低频听力损失影响了许多患者.
- 当前的耳植入技术很难有效地提供低频声刺激.
- 需要新的方法来提供全面的听力康复.
研究的目的:
- 为了证明使用激光诱导的光声学效应在内耳中产生低频纯音的可行性.
- 为了评估通过这种方法达到的声压水平.
- 评估其在与耳植入物联合的电声刺激中使用的潜力.
主要方法:
- 利用近红外区域的纳秒激光脉冲传递到人类尸体骨的圆窗中.
- 采用集成脉冲密度调制 (IPDM) 来产生从20 Hz到1 kHz的声学音调.
- 测量了内声压和计算了相当的声压水平 (等同于 在SPL的 dB).
主要成果:
- 通过光声学效应在内耳成功生成低频纯色调 (20 Hz - 1 kHz).
- 达到了140 eq. 的声压水平. 在 ≤200 Hz 的 dB SPL 下降到 90 eq. 在1kHz时,dB SPL.
- 证明了足够的声压水平,用于潜在的低频声刺激.
结论:
- 在圆形窗口上激光诱导的光声学效应是一种可行的方法,可以在内耳中产生低频调.
- 达成的声压水平表明,对于需要低频刺激的患者来说,有潜在的疗效.
- 这种技术为耳植入体用户的联合电声刺激中的声学组件提供了一个有希望的未来解决方案.
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