CAJ | 학술논문

目的在耳科正常成人中比较短纯音(tone burst)及同侧切迹噪声(notched noise)掩蔽短纯音诱发的听性脑干反应(ABR)反应阚对纯音听阈的预估;研究短纯音及两种不同强度切迹噪声掩蔽短纯音诱发的ABR(分别命名为tb-ABR、amtb-ABR和bmtb-ABR)的波形特点及差异.方法对20例(40耳)耳科正常人行纯音测听,并记录短纯音ABR和两种不同强度切迹噪声掩蔽短纯音诱发的ABR,对结果进行分析比较.结果 ①相同频率tb-ABR、amtb-ABR、bmtb-`ABR的反应阈接近,无统计学差异.②各频率tb-ABR、amtb-ABR、bmtb-ABR反应阈与相应频率纯音听阈之差的平均值均在15 dB以内.在相同频率,三种测试方法所得的反应阈与纯音听阈之差的平均值接近,无统计学差异.③在相同刺激强度,无论采用哪种测试方法,波V潜伏期均随频率升高而缩短.当刺激强度和频率相同时,波V潜伏期均表现为tb-ABR最短,amtb-ABR次之,bmtb-ABR最长,差异具有统计学意义.结论短纯音及同侧切迹噪声掩蔽短纯音诱发的ABR的反应阈均可用于预估纯音听阈.
목적 재이과정상성인중비교단순음(tone burst)급동측절적조성(notched noise)엄폐단순음유발적은성뇌간반응(ABR)반응감대순음은역적예고;연구단순음급량충불동강도절적조성엄폐단순음유발적ABR(분별명명위tb-ABR、amtb-ABR화bmtb-ABR)적파형특점급차이.방법 대20례(40이)이과정상인행순음측은,병기록단순음ABR화량충불동강도절적조성엄폐단순음유발적ABR,대결과진행분석비교.결과 ①상동빈솔tb-ABR、amtb-ABR、bmtb-`ABR적반응역접근,무통계학차이.②각빈솔tb-ABR、amtb-ABR、bmtb-ABR반응역여상응빈솔순음은역지차적평균치균재15 dB이내.재상동빈솔,삼충측시방법소득적반응역여순음은역지차적평균치접근,무통계학차이.③재상동자격강도,무론채용나충측시방법,파V잠복기균수빈솔승고이축단.당자격강도화빈솔상동시,파V잠복기균표현위tb-ABR최단,amtb-ABR차지,bmtb-ABR최장,차이구유통계학의의.결론 단순음급동측절적조성엄폐단순음유발적ABR적반응역균가용우예고순음은역.
Objective To compare the accuracy of auditory brain stem response (ABR) thresholds to tone burst and tone burst ipsilaterally masked by notched noise in estimating puretone thresholds of adults with normal hearing.To study characteristics of ABRs evoked by tone burst and tone burst in notched noise of two different intensities.These three kinds of ABRs were named as follows:tb-ABR,amtb-ABR and bmtb-ABR.Methods Puretone audiometry,ABRs to tone burst and tone burst ipsilaterally masked by notched noise of different intensities were tested in 20 adults (totally 40 ears) with normal hearing.Results ①Thresholds for tb-ABR,amtb-ABR and broth-ABR of each frequency all approximated each other,and there were no statistically significant differences between them.②The mean differences between puretone thresholds and thresholds for tb-ABR,amtb -ABR and bmtb-ABR of each frequency were all less than 15 dB.Those mean differences of different ABRs of the same frequency were approximate to each other and had no statistically differences.③No matter what kind of ABR was tested,the latencies of wave V shortened with increase of frequency in each ABR at the same intensity.When the intensity and frequency of the tone burst were the same,the latency of wave V of tb-ABR was always statistically shorter than that of amtb-ABR.The latter was also always statistically shorter than that of bmtb-ABR.Conclusion Thresholds for ABRs to tone burst and tone burst ipsilaterally masked by notched noise were useful in predicting puretone thresholds.