HEARING PROTECTOR ALLOWING ACOUSTIC COMMUNICATION

描述(申请人提供)：建议开发一种先进的 听力保护器，将环境声音的最大衰减与 提取声音中最重要的成分的信号处理 用于以受控方式向用户显示的字段。通过处理来自 安装在听力保护器头带上的麦克风阵列，这个装置 增强所需信号，使其来自指定的“环视方向” 来自其他方向的信号，允许面对面的声音通信 许多高噪音环境，否则是不可能的。在……里面 此外，信号处理允许保留声音本地化 才能。第一阶段工作开发了数组处理的实现 便携式DSP处理器上的算法及其对性能的影响 听众的声音定位和言语接受表现。的目标是 第二阶段--即将投入生产的完全指定的原型设备--将 通过四个方面的工作实现：1)开发算法 定向选通和自动频谱整形；2)研制 具有复合听力的将声刺激传递到耳道的能力 保护不受护套和插头的影响；3)主动降噪 组合保护模式，最大限度地降低音量；4)电子和 机械设计，允许麦克风和电路完全安装 戴在袖口式听力保护器的头带上。 建议的商业应用： 正在开发的听力保护器/通信耳机将在高噪声环境中使用，在高噪声环境中，需要同时具有听力保护和面对面交流和监控声音的能力。这些项目的某些方面将导致改进的通信耳机，即在不对环境进行声学感知的情况下向用户传递通信信号的设备。

DESCRIPTION (provided by applicant): Work is proposed to develop an advanced hearing protector that combines maximal attenuation of ambient sounds with signal processing that extracts the most important components of the sound field for controlled presentation to the user. By processing the signals from a microphone array mounted on the headband of the hearing protector, this device enhances desired signals from a specified "look about direction relative to signals from other directions, allowing face-to-face acoustic communication in many high-noise environments where it would be impossible otherwise. In addition, the signal processing allows the preservation of sound localization ability. Work in Phase I developed implementations of array-processing algorithms on a portable DSP processor and evaluations of their impact on listeners' sound localization and speech reception performance. The goal of Phase II -- a fully-specified prototype device ready for manufacturing -- will be achieved through work in four areas: 1) development of algorithms for directional gating and automatic spectral shaping; 2) development of the capability to deliver acoustic stimuli to the ear canals with combined hearing protection from muffs and insert plugs; 3) active noise reduction in the combined-protection mode for maximal sound reduction; and 4) electronic and mechanical design to allow the microphones and circuitry to be mounted entirely on the headband of a muff-style hearing protector. PROPOSED COMMERCIAL APPLICATION: The hearing protector/communication headset being developed will be of use in high-noise environments where it is necessary to have both hearing protection and the abilities to communicate face-to-face and to monitor sounds. Some aspects of the projects will result in improved communication headsets, devices that deliver a communication _signal to the user without acoustic sensing of the environment.