Temporal-Bone Measurements of the Maximum Equivalent Pressure Output and Maximum Stable Gain of a Light-Driven Hearing System That Mechanically Stimulates the Umbo.
Temporal-Bone Measurements of the Maximum Equivalent Pressure Output and Maximum Stable Gain of a Light-Driven Hearing System That Mechanically Stimulates the Umbo.
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DOI：
10.1097/mao.0000000000000941
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发表时间：
2016-02
期刊：
影响因子：
--
通讯作者：
Perkins R
中科院分区：
文献类型：
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作者：
Puria S;Maria PL;Perkins R
最大等效压力输出 (MEPO) 和最大稳定增益 (MSG) 测量结果表明光驱动听力系统 (Earlens) 具有高输出和高增益裕度。非手术 Earlens 由光激活平衡电枢鼓室透镜 (Lens) 组成，通过直接的 umbo 接触来驱动中耳。镜头由编码光脉冲驱动和供电。与传统助听器相比，Earlens 旨在在更宽的频率范围内提供更高水平的输出，并显着提高 MEPO 提供重要的验配指南的 MSG。使用四块新鲜人类尸体颞骨直接测量 MEPO。为了计算 MEPO 和 MSG，我们使用 Earlens 测量了靠近耳膜的压力以及声音驱动和光驱动的镫骨速度。基线声音驱动测量与之前的报告一致。平均 MEPO (N=4) 在 0.7 至 10 kHz 范围内变化范围为 116 至 128 dB SPL，峰值出现在 7.6 kHz 处。在 0.1–0.7 kHz 范围内，声压级在 83 到 121 dB 之间变化。对于平均 MSG，在 1-4 kHz 范围内出现约 10 dB 的最低值，高于该值在 7.6 kHz 时最高可达 42 dB。从 0.2 kHz 到 1 kHz，MSG 从大约 40 dB 线性下降到 10 dB。凭借高输出和高增益裕度，Earlens 可以提供更广泛的频谱放大，用于治疗轻度至重度听力障碍。
That maximum equivalent pressure output (MEPO) and maximum stable gain (MSG) measurements demonstrate high output and high gain margins in a Light Driven Hearing System (Earlens). The non-surgical Earlens consists of a light-activated balanced-armature Tympanic Lens (Lens) to drive the middle ear through direct umbo contact. The Lens is driven and powered by encoded pulses of light. In comparison to conventional hearing aids, the Earlens is designed to provide higher levels of output over a broader frequency range and a significantly higher MSG with the MEPO providing an important fitting guideline. Four fresh human cadaver temporal bones were used to measure MEPO directly. To calculate MEPO and MSG, we measured the pressure close to the eardrum and stapes velocity for sound drive and light drive using the Earlens. The baseline sound-driven measurements are consistent with previous reports. The average MEPO (N=4) varies from 116 to 128 dB SPL in the 0.7 to 10 kHz range, with the peak occurring at 7.6 kHz. From 0.1–0.7 kHz, it varies from 83 to 121 dB SPL. For the average MSG, a broad minimum of about 10 dB occurs in the 1–4 kHz range, above which it rises as high as 42 dB at 7.6 kHz. From 0.2 to 1 kHz, the MSG decreases linearly from about 40 dB to 10 dB. With high output and high gain margins, the Earlens may offer broader spectrum amplification for treatment of mild to severe hearing impairment.