目的：了解畸变产物耳声发射（DPOAE）在监测噪声性聋方面的应用价值。
Objective:To understand the value of using distortion product of otoacoustic emissions(DPOAE)in monitoring noise induced hearing loss.
本文介绍了模态声发射检测技术的基本原理、信号特征、噪声剔除和源定位等内容。
This paper introduces modal acoustic emission evaluation technique, including its fundamental principles, signal characteristic, noise rejection and source location etc.
电磁检测方法主要有材料磁性量测、巴克好森噪声和磁声发射。
Magnetism measuring, Barkhausen noise and magnetic acoustic emission were often used for electromagnetic testing.
声发射源与接收讯号传感器间的距离以及环境噪声的电平是选择频带的主要依据。
The distance between the acoustic-emission source and the receiving transducer, and the background noise level are primary factors in selecting a particular frequency band.
煤与瓦斯突出前有征兆显现——煤体声发射，然而实际采样到的煤体声发射信号往往含有许多噪声，严重影响了预测可靠性。
There is a sign before coal and gas outburst-acoustic emission, but a lot of noise included in acoustic emission affects reliability of prediction severely.
目的了解噪声对飞行员畸变产物耳声发射(DPOAE)的影响及其与纯音听阈的关系。
Objective to investigate the effect of noise on DPOAE in pilots and its relation with pure tone auditory thresholds.
由于各种噪声的影响，以及声发射信号传播过程的复杂性，又给声源的识别带来一定的困难。
Because of the noise and complex of AE signal transmission characteristic, the recognition of AE source is very difficult.
本文分别以白噪声及扫频信号为信号源，采用计算机仿真软件MATLAB，对声波在声发射端和接收端之间的飞渡时间的互相关估计进行了计算机仿真研究。
In this paper we separately use White noise and chirp signal as signal source, and apply simulate software MATLAB to research the time delay between the transmitted signal and the received signal.
本文分别以白噪声及扫频信号为信号源，采用计算机仿真软件MATLAB，对声波在声发射端和接收端之间的飞渡时间的互相关估计进行了计算机仿真研究。
In this paper we separately use White noise and chirp signal as signal source, and apply simulate software MATLAB to research the time delay between the transmitted signal and the received signal.
应用推荐