突变截面管式通气孔对耳模声学特性的影响  

The Effects of Abrupt Changing Vents on the Acoustic Characteristics of Earmolds

作　　者：杨毅[1] 王枫[1] 赵慧云[1] 

机构地区：[1]浙江中医药大学听力与言语科学学院,杭州310053

出　　处：《中国听力语言康复科学杂志》2014年第1期40-43,共4页Chinese Scientific Journal of Hearing and Speech Rehabilitation

摘　　要：目的通过改变耳模通气孔的形状，探讨突变截面管式通气孔在耳模声学特性中的优势。方法利用埋管的方法为每位受试者分别制取通气孔为平行、扩张和收缩形状的耳模，然后受试者佩戴每个耳模进行真耳分析，测量佩戴各个耳模时的REOG和REIG值。结果①2 mm平行通气孔耳模与扩张管式通气孔耳模的REOG值相比较，在500 Hz和750 Hz处有显著性差异（P〈0.05）；与收缩管式通气孔耳模的REOG值相比较在各个频率上均无显著性差异（P〉0.05）。②2 mm平行通气孔耳模与扩张管式通气孔耳模的REIG值相比较，在2 kHz处具有显著性差异（P〈0.05）；与收缩管式通气孔耳模的REIG值相比较在2 kHz和3 kHz处具有显著性差异（P〈0.05）。结论突变截面管式通气孔中收缩管式在解决堵耳效应问题上与2 mm平行通气孔有着相似的效果，但突变截面管式通气孔扩张和收缩式耳模可获得更大的助听增益，其中收缩管式通气孔耳模的作用要优于扩张管式通气孔耳模。Objective To explore the acoustic advantages of abrupt changing vents in the earmolds. Methods Pipelaying was applied to make parallel,expanding and shrinking vents for each subject. The real-ear occluded gain （REOG） and real-ear insertion gain （REIG） were measured from the subjects wearing different earmolds. Results （1） There were significant differences in REOG between earmolds with expanding vents and with parallel vents at 500 Hz and 750 Hz（P〈0.05）. There was no significant difference in REOG between earmolds with shrinking vents and those with parallel vents at all frequencies（P〉0.05）.（2） There were significant differences in REIG between earmolds with expanding vents and those with parallel vents at 2000 Hz（P〈0.05）as well as between earmolds with shrinking vents and those with parallel vents at 2000 and 3000 Hz（P〈0.05）. Conclusion The abrupt changing vent is similar with the 2 mm parallel vent in dealing with occlusion,but the earmolds with expanding and shrinking vents can achieve more gains and the effects of shrinking vents are better than expanding vents.

关 键 词：耳模 突变截面管 堵耳效应 声反馈 真耳分析 

分 类 号：R445.1[医药卫生—影像医学与核医学]