耳声导抗检测校准算法的研究  

Study on the calibration algorithm for acoustic immittance

作　　者：王立伟[1] 李跃杰[1] 高用贺[1] 张明蓉[1] 

机构地区：[1]中国医学科学院北京协和医学院生物医学工程研究所,天津300192

出　　处：《国际生物医学工程杂志》2013年第6期336-339,共4页International Journal of Biomedical Engineering

基　　金：协和青年科研基金项目（2012J14）

摘　　要：目的 设计耳声导抗校准算法,以减少由于耳机及器件等非线性引起的误差.方法 采用数字化检测系统设计,对不同容积校准腔（0.5、2.0、5.0 ml）进行检测,根据校准腔的数值对耳声导抗信号进行数字校准算法处理,生成校准数据表,通过输入耳声导抗值可查表进行线性校准.结果 在低频探测音测量时,鼓室图功能测量结果准确,对不同容积校准腔进行测量,误差均≤1％.结论 耳声导抗校准算法提高了系统检测精度,可为临床诊断提供可靠依据.Objective To reduce the error caused by the non-linearity of headphone and device via the design of calibration algorithm for acoustic immittance.Methods Values of calibration chambers with different volumes （0.5,2.0 and 5.0 ml） were measured using the digital detection system.Then,the calibration data tables,for linearity calibration with inputting the values of acoustic immittance,were produced by means of processing the signal of acoustic immittance using the digital calibration algorithm based on the values from the calibration chambers,Results With the low frequency probe tone measurement,it was confirmed that the range of error among various calibration chambers with different volumes was 1％.Conclusion The calibration algorithm enables the improving of the detection accuracy and provides the reliable data for further clinical application.

关 键 词：导抗 校准 探测音 校准腔 

分 类 号：R764.04[医药卫生—耳鼻咽喉科] TN911.72[医药卫生—临床医学]