基于嵌入式系统噪声引起听力损伤快速筛查仪的研制  

Development of Quick Screener Based on Embedded System for Noise-induced Hearing Loss

作　　者：季家红[1] 郭军涛[1] 余文斌[2] 

机构地区：[1]空军总医院,北京100142 [2]空军航空医学研究所,北京100036

出　　处：《医疗卫生装备》2009年第4期22-24,共3页Chinese Medical Equipment Journal

摘　　要：目的:研制一种适于飞行员使用的便携式全自动听力损伤快速筛查仪,用于预防高性能战机强噪声给飞行和地勤人员带来的听力损伤。方法:创新性地采用了音频解码芯片VS1003来实现听力损伤快速筛查以及特定背景噪声的预暴露。系统采用了ARM7-TDMI架构的LPC2148为主控芯片,软件设计上采用了基于UCOS-Ⅱ的多任务调度机制,以FAT文件系统的方式对SD卡的文件进行读写操作,信号的出现、听力级的改变、频率的选择以及受试者反应的记录均由系统自动完成,自动实现听力损伤评级。结果:该系统经过标定,能够按照《GBZ49—2002职业性听力损伤诊断标准》输出稳定频率和强度的音频信号,实现听力损伤自动筛查以及特定背景的噪声预暴露功能。结论:基于嵌入式系统和音频解码芯片VS1003设计的全自动听力损伤快速筛查仪能够按照设计要求实现听力损伤自动筛查和听力防护,整机具有硬件结构简单、集成度高、稳定性好、系统使用灵活等特点。Objective To develop a portable and automatic quick screener for noise-induced hearing loss（NIHL）, which is suitable for airman and ground crew. Methods Through using audio decoder chip VS1003 to achieve quick screener for noise-induced hearing loss and pre-exposing for special background noise. LPC2148 of ARM7-TDMI configuration was adopted as main controlling chip, and its software design was completed by multitask scheduler based on UCOS-Ⅱ, while the FAT system controlled the read-write to the files in SD card. The signal emergence, change in hearing class, frequency selection as well as records of subject reaction were automatically achieved, Results The system can produce stable signal of exact frequency according to GBZ49-2002 Diagnostic Criteria of Occupational Noise-induced Hearing Loss to output stability of the frequency and intensity of the audio signal, and the specific context of the noise pre-exposure function with screening of hearing impairment was achieved automatically. Conclusion Based on the great power of embedded system and VS1003, the portable and automatic quick screener for noise-induced hearing loss（NIHL） can be developed to carry out many functions, which has several features, such as simple structure, high integration, good stability and use of flexible etc.

关 键 词：嵌入式系统 噪声引起听力损伤 ARM 声预处理 

分 类 号：TH785.1[机械工程—仪器科学与技术] TH782[机械工程—精密仪器及机械]