The EarLens system: new sound transduction methods.
The EarLens system: new sound transduction methods.
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DOI：
10.1016/j.heares.2010.01.012
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发表时间：
2010-05
期刊：
影响因子：
2.8
通讯作者：
Puria, Sunil
中科院分区：
文献类型：
--
作者：
Perkins, Rodney;Fay, Jonathan P.;Rucker, Paul;Rosen, Micha;Olson, Lisa;Puria, Sunil
关键词：
假设进行测试，一个开放式耳道听力设备，在耳道中的麦克风，可以被设计为提供放大在一个宽的带宽和没有声反馈。在所考虑的设计中，由具有嵌入式磁体的薄硅树脂平台组成的换能器直接放置在鼓膜上。由耳道中的麦克风拾取的声音，包括被认为对嘈杂环境中的语音感知有用的声音定位线索，被处理和放大，然后用于驱动鼓膜换能器附近的线圈。声音的感知是由换能器响应于线圈产生的电磁场而振动引起的。16名受试者（从听力正常到中度听力受损）佩戴该传感器长达10个月，并监测任何不良反应。测量了三个关键功能特性：1）换能器的最大等效压力输出（MEPO）; 2）反馈增益裕度（GM），其描述了反馈发生前的最大允许增益;以及3）鼓膜阻尼效应（DTM），其描述了由于将换能器放置在鼓膜上而导致的听力水平的变化。结果表明，鼓膜换能器保持在原位，耐受性良好。该系统可以产生足够的输出，以达到那些高达60 dBHL的听力障碍的阈值，在86%的研究人群中高达8 kHz，在50%的人群中高达11.2 kHz。反馈增益裕度平均为30 dB，除了在3和9 kHz的耳道共振频率处，其中平均值分别降低到12 dB和23 dB。DTM的平均值在任何地方都接近0 dB，除了在2-4 kHz范围内，其峰值为8 dB。还描述了一种新的替代系统，该系统使用光子能量将信号和功率传输到EarLens平台上的光电二极管和微致动器。
The hypothesis is tested that an open-canal hearing device, with a microphone in the ear canal, can be designed to provide amplification over a wide bandwidth and without acoustic feedback. In the design under consideration, a transducer consisting of a thin silicone platform with an embedded magnet is placed directly on the tympanic membrane. Sound picked up by a microphone in the ear canal, including sound-localization cues thought to be useful for speech perception in noisy environments, is processed and amplified, and then used to drive a coil near the tympanic-membrane transducer. The perception of sound results from the vibration of the transducer in response the electromagnetic field produced by the coil. Sixteen subjects (ranging from normal-hearing to moderately hearing-impaired) wore this transducer for up to a ten-month period, and were monitored for any adverse reactions. Three key functional characteristics were measured: 1) the maximum equivalent pressure output (MEPO) of the transducer; 2) the feedback gain margin (GM), which describes the maximum allowable gain before feedback occurs; and 3) the tympanic-membrane damping effect (DTM), which describes the change in hearing level due to placement of the transducer on the eardrum. Results indicate that the tympanic-membrane transducer remains in place and is well tolerated. The system can produce sufficient output to reach threshold for those with as much as 60 dBHL of hearing impairment for up to 8 kHz in 86% of the study population, and up to 11.2 kHz in 50% of the population. The feedback gain margin is on average 30 dB except at the ear canal resonance frequencies of 3 and 9 kHz, where the average was reduced to 12 dB and 23 dB respectively. The average value of DTM is close to 0 dB everywhere except in the 2–4 kHz range, where it peaks at 8 dB. A new alternative system that uses photonic energy to transmit both the signal and power to a photodiode and micro-actuator on an EarLens platform is also described.
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影响因子：
2.4
作者：
MIDDLEBROOKS, JC;MAKOUS, JC;GREEN, DM
通讯作者：
GREEN, DM
影响因子：
2.4
作者：
Best, V;Carlile, S;van Schaik, A
通讯作者：
van Schaik, A
影响因子：
2.4
作者：
Lee, Chia-Fone;Shih, Chih-Hua;Liu, Tien-Chen
通讯作者：
Liu, Tien-Chen
影响因子：
1.4
作者：
BOEDTS, D;KUIJPERS, W
通讯作者：
KUIJPERS, W
DOI：
10.1044/jshr.2501.15
发表时间：
1982-01-01
期刊：
JOURNAL OF SPEECH AND HEARING RESEARCH
影响因子：
--
作者：
KILLION, MC;TILLMAN, TW
通讯作者：
TILLMAN, TW