It′s generally believed that the appropriate stimuli for sound field tests are warble tones and narrow band noise, while pure tone can only be a signal used in the free field and earphone listening conditions. In thi...It′s generally believed that the appropriate stimuli for sound field tests are warble tones and narrow band noise, while pure tone can only be a signal used in the free field and earphone listening conditions. In this study, we take a measurement of sound pressure distribution, sound field variability, and effects of frequency shifting on sound pressure levels (SPLs) at reference points of pure tone in an audiometric test room. It was found that the pure tone SPLs were also distributed uniformly at some sound field areas although it was not so well as warble tones. This indicated that the test results were relatively stable to head movement and/or frequency shifting in those regions, which was confirmed by the clinical measurements on 20 subjects with severe sensorineural hearing loss. Our study concluded that pure tones could also be suitable for sound field audiometry if subjects were seated at a proper location on the basis of the sound field calibrations.展开更多
<strong>Aim:</strong> Chronic otitis media (COM) is chronic muco purulent discharge through a perforated tympanic membrane. Theossicular chain damage is found in both mucosal and squamosal types of COM. We...<strong>Aim:</strong> Chronic otitis media (COM) is chronic muco purulent discharge through a perforated tympanic membrane. Theossicular chain damage is found in both mucosal and squamosal types of COM. We aim to evaluate relationship between preoperative otologic features, pure tone audiometric findings and intraoperative ossicular chain status in patients with chronic otitis media. <strong>Material and Methods:</strong> 100 patients of either sex aged between 12 to 60 years operated for active or inactive, squamosal or mucosal chronic otitis media attending Ram Lal Eye and ENT Hospital, Government Medical College Amritsar were taken. The preoperative ossicular chain status based on set parameters was compared with the intraoperative ossicular chain status. <strong>Results:</strong> The ossicular chain integrity is more commonly compromised in squamosal COM and the most common ossicle eroded is Incus. Pure tone audiogram has got a very important role in determining the ossicular chain integrity preoperatively and must be done in all cases with accuracy. <strong>Conclusion:</strong> It is concluded that on the basis of otoscopic examination and pure tone audiometry values, we can accurately classify the COM as mucosal or squamosal type and get an idea of the ossicular chain integrity preoperatively hence planning the extent of surgery.展开更多
Objective:To describe audiological symptoms,audiometric profile,and distortion product otoacoustic emission in symptomatic patients recovering from SARS-CoV-2 infection(positive RT-PCR test)and asymptomatic patients(n...Objective:To describe audiological symptoms,audiometric profile,and distortion product otoacoustic emission in symptomatic patients recovering from SARS-CoV-2 infection(positive RT-PCR test)and asymptomatic patients(negative RT-PCR test).Methods:An analytical cross-sectional study was conducted using data obtained from clinical charts,physical examination,audiometry,and distortion product otoacoustic emission on 40 patients[case patients(CP)]recovering from SARS-CoV-2 infection diagnosed by a positive RT-PCR test and 22asymptomatic participants with a negative RT-PCR test[non-case(NC)].Results:Sixty-two patients(mean age:31.1 and 28.2 years in the CP and NC groups,respectively)were included.All participants were young without significant comorbidities,risk factors for hearing loss or otological history.Vertigo(5%),tinnitus(17.5%)and aural fullness/hearing loss(35%)were found in the CP group.A statistically significant difference was found in specific frequencies(1000,4000,and 8000 Hz)and pure tone average(low and high conversational frequencies with increased threshold in the PC group compared with the NC group),which was not found in distortion product otoacoustic emission.Conclusion:Audiovestibular symptoms are frequent in symptomatic patients recovering from SARS-CoV-2 infection.SARS-CoV-2 infection was consistently associated with an increased audiometric hearing threshold at specific frequencies and low tone average.展开更多
目的探讨中文版老年听力障碍筛查量表(hearing handicap inventory for the elderly-screening,HHIE-S)评分与纯音听阈测试的关联性与差异性,为该量表的临床应用提供依据。方法275例老年受试者(听力正常者47例、不同程度听力损失者228例...目的探讨中文版老年听力障碍筛查量表(hearing handicap inventory for the elderly-screening,HHIE-S)评分与纯音听阈测试的关联性与差异性,为该量表的临床应用提供依据。方法275例老年受试者(听力正常者47例、不同程度听力损失者228例)填写中文版HHIE-S量表获得评分,并进行纯音听阈测试,比较受试者中文版HHIE-S量表评分与较好耳500、1000、2000、4000 Hz纯音气导听阈平均值(PTA)之间的关联性与差异性。结果275例受试者中,PTA正常组47例,HHIE-S评分为无听力障碍者占80.85%(38/47);PTA轻度听力损失组101例,HHIE-S评分为轻中度听障者占38.61%(39/101);PTA中度听力损失组110例,HHIE-S评分为轻中度听障者占40.0%(44/110);PTA重度听力损失组17例,HHIE-S评分为重度听障者占82.35%(14/17)。HHIE-S与纯音听阈测试结果的Kappa系数为0.210(P<0.001)。HHIE-S评分与PTA的Pearson相关系数r为0.722(P<0.001)。以PTA≤25 dB HL为听力正常、HHIE-S评分≤8分表示无听力障碍,HHIE-S量表的敏感性为61.0%,特异性为80.9%,阳性预测值为93.9%,阴性预测值为29.9%。结论HHIE-S量表与纯音听阈测试既有较好的关联性,又有差异性,二者联合应用可以全面评估老年人的听力状况。展开更多
目的通过比较听性稳态反应(auditory steady-state responses,ASSR)阈值与纯音测听(pure tone audiometry,PTA)阈值,为ASSR技术应用于听力障碍法医学鉴定提供技术数据。建立本实验室ASSR阈值与PTA阈值的校正值。方法对27例(54耳)正常听...目的通过比较听性稳态反应(auditory steady-state responses,ASSR)阈值与纯音测听(pure tone audiometry,PTA)阈值,为ASSR技术应用于听力障碍法医学鉴定提供技术数据。建立本实验室ASSR阈值与PTA阈值的校正值。方法对27例(54耳)正常听力志愿者进行PTA及500、1000、2000和4000Hz的ASSR测试,采用配对t检验法比较测试耳ASSR阈值与PTA阈值的关系;并验证SmartEP-ASSR测试系统校正后的ASSR阈值与PTA阈值的一致性。结果正常耳ASSR阈值较PTA阈值高(P<0.05),各频率差值:500Hz为(22.04±5.79)dB,1000Hz为(11.02±5.44)dB,2000Hz为(12.59±5.89)dB,4000Hz为(17.78±7.25)dB;仪器校正后的ASSR阈值与PTA阈值的差值:500Hz为(-3.96±5.79)dB,1000Hz为(0.02±5.44)dB,2000Hz为(-0.41±5.89)dB,4000Hz为(-1.25±7.25)dB。结论听力正常人ASSR阈值较PTA阈值高,其差值在各频率不一致,平均为16.9dB。ASSR用于听力障碍法医学鉴定中评估行为听阈时,ASSR阈值需要进行校正。展开更多
文摘It′s generally believed that the appropriate stimuli for sound field tests are warble tones and narrow band noise, while pure tone can only be a signal used in the free field and earphone listening conditions. In this study, we take a measurement of sound pressure distribution, sound field variability, and effects of frequency shifting on sound pressure levels (SPLs) at reference points of pure tone in an audiometric test room. It was found that the pure tone SPLs were also distributed uniformly at some sound field areas although it was not so well as warble tones. This indicated that the test results were relatively stable to head movement and/or frequency shifting in those regions, which was confirmed by the clinical measurements on 20 subjects with severe sensorineural hearing loss. Our study concluded that pure tones could also be suitable for sound field audiometry if subjects were seated at a proper location on the basis of the sound field calibrations.
文摘<strong>Aim:</strong> Chronic otitis media (COM) is chronic muco purulent discharge through a perforated tympanic membrane. Theossicular chain damage is found in both mucosal and squamosal types of COM. We aim to evaluate relationship between preoperative otologic features, pure tone audiometric findings and intraoperative ossicular chain status in patients with chronic otitis media. <strong>Material and Methods:</strong> 100 patients of either sex aged between 12 to 60 years operated for active or inactive, squamosal or mucosal chronic otitis media attending Ram Lal Eye and ENT Hospital, Government Medical College Amritsar were taken. The preoperative ossicular chain status based on set parameters was compared with the intraoperative ossicular chain status. <strong>Results:</strong> The ossicular chain integrity is more commonly compromised in squamosal COM and the most common ossicle eroded is Incus. Pure tone audiogram has got a very important role in determining the ossicular chain integrity preoperatively and must be done in all cases with accuracy. <strong>Conclusion:</strong> It is concluded that on the basis of otoscopic examination and pure tone audiometry values, we can accurately classify the COM as mucosal or squamosal type and get an idea of the ossicular chain integrity preoperatively hence planning the extent of surgery.
文摘目的探讨短纯音刺激皮层听觉诱发电位(cortical auditory evoked potentials,CAEP)对听力评估的价值。方法受试者为听力正常成人19例(36耳),感音神经性聋成人患者21例(21耳),以500、1000、2000和4000 Hz短纯音作为刺激声,在醒觉状态下颅顶电极记录CAEP的N1-P2复合波,分析N1-P2阈值与纯音听阈的相关性,以及两者差值在不同人群中的差异。结果所有受试者四个测试频率的N1-P2阈值与对应频率纯音听阈值的相关系数依次为0.971、0.967、0.958、0.955,呈显著的线性相关;听力正常组36耳500、1000、2000和4000 Hz的N1-P2阈值上限(95%置信区间)依次为32、27、32、39 dB SPL,即正常人阈值上限为32.5 dB SPL;正常人N1-P2阈值与纯音听阈的差值依次为18.9±6.1、11.6±5.9、13.3±7.0、18.7±8.3 dB;感音神经性聋患者两者差值依次为10.3±6.0、6.8±8.9、6.5±9.5、12.9±11.4 dB,四个测试频率的差值在两组人群中的差异均有统计学意义(P<0.05)。结论听力正常人短纯音CAEP的N1-P2平均阈值小于32.5 dB SPL;N1-P2阈值与对应频率纯音听阈相关性非常好,听力评估中使用N1-P2阈值预测听力时应注意刺激声的校准及校正值的使用。
基金supported by the Universidad Nacional de Colombia and Hospital Universitario Nacional(HUN)de Colombia。
文摘Objective:To describe audiological symptoms,audiometric profile,and distortion product otoacoustic emission in symptomatic patients recovering from SARS-CoV-2 infection(positive RT-PCR test)and asymptomatic patients(negative RT-PCR test).Methods:An analytical cross-sectional study was conducted using data obtained from clinical charts,physical examination,audiometry,and distortion product otoacoustic emission on 40 patients[case patients(CP)]recovering from SARS-CoV-2 infection diagnosed by a positive RT-PCR test and 22asymptomatic participants with a negative RT-PCR test[non-case(NC)].Results:Sixty-two patients(mean age:31.1 and 28.2 years in the CP and NC groups,respectively)were included.All participants were young without significant comorbidities,risk factors for hearing loss or otological history.Vertigo(5%),tinnitus(17.5%)and aural fullness/hearing loss(35%)were found in the CP group.A statistically significant difference was found in specific frequencies(1000,4000,and 8000 Hz)and pure tone average(low and high conversational frequencies with increased threshold in the PC group compared with the NC group),which was not found in distortion product otoacoustic emission.Conclusion:Audiovestibular symptoms are frequent in symptomatic patients recovering from SARS-CoV-2 infection.SARS-CoV-2 infection was consistently associated with an increased audiometric hearing threshold at specific frequencies and low tone average.
文摘目的探讨中文版老年听力障碍筛查量表(hearing handicap inventory for the elderly-screening,HHIE-S)评分与纯音听阈测试的关联性与差异性,为该量表的临床应用提供依据。方法275例老年受试者(听力正常者47例、不同程度听力损失者228例)填写中文版HHIE-S量表获得评分,并进行纯音听阈测试,比较受试者中文版HHIE-S量表评分与较好耳500、1000、2000、4000 Hz纯音气导听阈平均值(PTA)之间的关联性与差异性。结果275例受试者中,PTA正常组47例,HHIE-S评分为无听力障碍者占80.85%(38/47);PTA轻度听力损失组101例,HHIE-S评分为轻中度听障者占38.61%(39/101);PTA中度听力损失组110例,HHIE-S评分为轻中度听障者占40.0%(44/110);PTA重度听力损失组17例,HHIE-S评分为重度听障者占82.35%(14/17)。HHIE-S与纯音听阈测试结果的Kappa系数为0.210(P<0.001)。HHIE-S评分与PTA的Pearson相关系数r为0.722(P<0.001)。以PTA≤25 dB HL为听力正常、HHIE-S评分≤8分表示无听力障碍,HHIE-S量表的敏感性为61.0%,特异性为80.9%,阳性预测值为93.9%,阴性预测值为29.9%。结论HHIE-S量表与纯音听阈测试既有较好的关联性,又有差异性,二者联合应用可以全面评估老年人的听力状况。
文摘目的通过比较听性稳态反应(auditory steady-state responses,ASSR)阈值与纯音测听(pure tone audiometry,PTA)阈值,为ASSR技术应用于听力障碍法医学鉴定提供技术数据。建立本实验室ASSR阈值与PTA阈值的校正值。方法对27例(54耳)正常听力志愿者进行PTA及500、1000、2000和4000Hz的ASSR测试,采用配对t检验法比较测试耳ASSR阈值与PTA阈值的关系;并验证SmartEP-ASSR测试系统校正后的ASSR阈值与PTA阈值的一致性。结果正常耳ASSR阈值较PTA阈值高(P<0.05),各频率差值:500Hz为(22.04±5.79)dB,1000Hz为(11.02±5.44)dB,2000Hz为(12.59±5.89)dB,4000Hz为(17.78±7.25)dB;仪器校正后的ASSR阈值与PTA阈值的差值:500Hz为(-3.96±5.79)dB,1000Hz为(0.02±5.44)dB,2000Hz为(-0.41±5.89)dB,4000Hz为(-1.25±7.25)dB。结论听力正常人ASSR阈值较PTA阈值高,其差值在各频率不一致,平均为16.9dB。ASSR用于听力障碍法医学鉴定中评估行为听阈时,ASSR阈值需要进行校正。
