NOISE REDUCTION FOR HEARING AIDS

这项研究的总体目标是改善语音 为听障人士提供噪音的清晰度。 具体目标是 开发和评估自适应麦克风阵列。 该阵列将 是铅笔的大小，可以手持或戴在一边， 一副眼镜。 麦克风阵列将大大改善 听力受损的听众有效沟通的能力 噪音和混响的条件，现在造成严重的困难， 包括会议室、演讲霍尔斯、餐厅、教堂或 一大群人。 本研究涉及自适应阵列的开发和测试。 阵列几何形状和信号处理将首先在 电脑 然后，将在真实的环境中构建和测试阵列。 混响室中的噪声条件。 物理测试将是 基于测量信噪比（SNR）的改善， 与现有的助听器设计相比， 不合格测试将基于确定语音识别， 不同阵列使用和空间条件下SNR的函数 与现有的助听器技术相比， 混响室中自适应阵的抗噪能力 因此，将确定并直接关系到所获得的改进 在语言清晰度上。

The overall goal of the proposed research is to improve speech intelligibility in noise for the hearing-impaired. The specific aims are to develop and evaluate and adaptive microphone array. The array will be the size of a pencil, and could be hand-held or worn on the side of a pair of eyeglasses. The microphone array will greatly improve the ability of hearing impaired listeners to communicate effectively under conditions of noise and reverberation that now cause severe difficultly, including meeting rooms, lecture halls, restaurants, churches, or in large groups of people. The research involves the development and testing of the adaptive array. The array geometry and signal processing will first be stimulated on a computer. The array will then be built and tested under realistic conditions of noise in a reverberant room. Physical testings will be based on measuring the improvement in the signal-to-noise ratio (SNR) for the array in comparison with an existing hearing-aid design. Ineligibility testing will be based on determining speech recognition as a function of SNR for different conditions of array usage and room reverberation, again in comparison with existing hearing-aid technology. The ability of the adaptive array to reject noise in a reverberant room will thus be determined and directly related to the improvements obtained in speech intelligibility.