Multi-microphone long probe for OAE acquisition

用于 OAE 采集的多麦克风长探头

• 批准号: 6933674
• 负责人: Rafael E Delgado
• 金额: $ 10万
• 依托单位: INTELLIGENT HEARING SYSTEMS
• 依托单位国家: 美国
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-05-05 至 2007-04-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6933674
• 关键词: adult human (21+); artificial intelligence; bioengineering /biomedical engineering; biomedical equipment development; clinical biomedical equipment; clinical research; computer program /software; ear disorder diagnosis; infant human (0-1 year); mathematics; noise; otoacoustic emission; sound frequency

DESCRIPTION (provided by applicant): The development of an innovative multi-microphone probe and acquisition system for recording otoacoustic emissions {OAEs} with advanced noise cancellation algorithms, increased frequency and intensity ranges and pressurization capabilities is proposed. Two advanced noise cancellation algorithm will be implemented: 1) a multi-reference adaptive noise cancellation (ANC) network and 2) two-dimensional filtering. These algorithms will utilize the independent measurements provided by the multiple microphones in order to reduce noise contaminants. Each microphone or microphone groupings will be connected to individual analog-to-digital (A/D) converters in order to allow for the implementation of the digital signal processing algorithms. The pressurization capabilities of the probe will allow implementation of tympanometry and the acquisition of OAEs while compensating for pressure imbalances between the outer and middle ear. Results from a prototype single microphone long probe are presented demonstrating that the design concept is valid and provides good quality OAE recordings while reducing the undesirable effects of the metal response. The proposed probe will also improve upon the limited dynamic and frequency range of current OAE probes. The probe is expected to be able to provide stimulus levels of up to 90 dB HL and a frequency response of up to 24 kHz. During Phase I, various probes will be constructed and tested under different noise conditions in adult and infant subjects. During Phase II, the pressurization capabilities of the new probe will be further developed and examined. The optimal probe designed will be implemented along with the optimal noise cancellation algorithm and tested in a comprehensive clinical study incorporating the pressurization capabilities of the probe.

描述（由申请人提供）：提出了具有高级噪声取消算法的创新性多微型探针和采集系统，用于记录耳声发射{OAES}，提高了频率和强度范围和压力功能。将实现两种高级降噪算法：1）多引用自适应噪声取消（ANC）网络和2）二维滤波。这些算法将利用多个麦克风提供的独立测量值，以减少噪声污染物。每个麦克风或麦克风分组将连接到单个类似物对数字（A/D）转换器，以便实现数字信号处理算法。探针的加压功能将允许在外耳和中耳之间弥补外侧和中耳之间的压力不平衡的同时，允许实施鼓膜和oaes的采集。提出了原型单麦克风长探头的结果，表明该设计概念是有效的，并提供了高质量的OAE记录，同时降低了金属响应的不良影响。提出的探针还将在电流OAE探针的有限动态和频率范围内改善。预计该探针能够提供高达90 dB HL的刺激水平和高达24 kHz的频率响应。在第一阶段，将在成人和婴儿受试者的不同噪声条件下构建和测试各种探针。在第二阶段，将进一步开发和检查新探针的加压能力。设计的最佳探针将与最佳降噪算法一起实施，并在一项综合探针的加压能力的综合临床研究中进行了测试。