Objective:To explore the characteristics of audiology examination of Noise-Induced Hidden Hearing Loss(NIHHL),and then explore its valuable diagnostic methods.Methods:A total of 80 young men aged between 19 and 35 wer...Objective:To explore the characteristics of audiology examination of Noise-Induced Hidden Hearing Loss(NIHHL),and then explore its valuable diagnostic methods.Methods:A total of 80 young men aged between 19 and 35 were selected.They were classified into the experimental group with noise exposure history and the control group without noise exposure history,with 40 men in each group.We carried out extended high-frequency audiometry test for good ears;conducted speech in noise measurement and distortion product emission for good ears;DPOAE test,compare and analyze the results of each test.Results:The extended high frequency hearing threshold test results showed that the hearing threshold of the experimental group was larger than that of the control group at the frequency above 8 kHz,with significant statistical difference(p<.01).The results of speech audiometry under noise showed that the signal-to-noise ratio loss in the experimental group was greater than that in the control group,with a significant statistical difference(p<.01).The results of otoacoustic emission showed that the signal-to-noise ratio of the experimental group was lower than that of the control group at the frequency of 6 kHz and above,with a statistically significant difference(p<.01).There is a correlation between pure tone audiometry and DPOAE test results at high frequencies(6 kHz:p<.0001,r=-.478;8 kHz:p<.0001,r=-.491);There was a correlation between speech audiometry and DPOAE test results under noise(p=.031,r=-.299).Conclusions:Compared with the control group,the extended high frequency pure tone hearing threshold increased or could not be elicited in the experimental group,speech recognition ability decreased significantly under noise,DPOAE was normally elicited but signal-to-noise ratio decreased,and there was a certain correlation between them.The above three audiological examination methods have a certain reference value for early recognition of hidden hearing loss.展开更多
Objective To detect early signs of noise-induced hearing loss(NIHL) in military pilots without hearing complaints. Methods Pure tone audiometry and acoustic reflex thresholds were tested in 36 military pilots (72 ears...Objective To detect early signs of noise-induced hearing loss(NIHL) in military pilots without hearing complaints. Methods Pure tone audiometry and acoustic reflex thresholds were tested in 36 military pilots (72 ears) with noise exposure history but no complaints of hearing loss. Conventional test frequencies (0.25-8 kHz) and extended high frequencies (EHF, 10 and 12.5 kHz) were included in audiometry. White noise and pure tones at 0.5, 1, 2, and 4 kHz were used for acoustic reflex tests. Twenty normal hearing subjects(40 ears) with no exposure to occupational noise were used as controls. Results Pure tone thresholds at all conventional frequencies and at EHFs were elevated in the pilots, with the maximum shift at 4 kHz, compared with controls (p < 0.01). The pilots also showed elevated ART to white noise and decreased differentials between white noise and pure tone ARTs (p< 0.01). Conclusion Early signs of NIHL are present in some symptom-free military pilots. High frequency hearing threshold shift, elevated white noise ART and decreased differential between white noise and pure tone ARTs may be objective indicators of early NIHL.展开更多
Migraine,a moderate to severe chronic headache occurring on one or both sides,is a common disease affects young people.Although hearing loss in subjects with migraine is not rare,the correlation of migraine with heari...Migraine,a moderate to severe chronic headache occurring on one or both sides,is a common disease affects young people.Although hearing loss in subjects with migraine is not rare,the correlation of migraine with hearing loss is not clear.In this study,we examined hearing loss in young migraine subjects to determine if migraine may be a factor in causing cochlear dysfunction.Seven college students with migraine and three age matched subjects without history of migraine were assessed using extended high frequency audiometry and distortion product otoacoustic emissions(DPOAEs).There was no significant difference in regular audiomeiry threshold between the migraine group and the control group.However,high frequency audiometry(9-16 kHz) showed thresholds at 25 dB nHL or higher in six out of twenty ears in the migraine group.The amplitude of DPOAEs were reduced for more than 10 dB in the migraine group in comparison with the control group.These data suggest that migraine may affect cochlear dysfunction evidenced by the reduced amplitude of DPOAE and high frequency pure-tone audiometry.展开更多
基金supported by the Science and Technology Bureau of Baotou City(project number jkws202057).
文摘Objective:To explore the characteristics of audiology examination of Noise-Induced Hidden Hearing Loss(NIHHL),and then explore its valuable diagnostic methods.Methods:A total of 80 young men aged between 19 and 35 were selected.They were classified into the experimental group with noise exposure history and the control group without noise exposure history,with 40 men in each group.We carried out extended high-frequency audiometry test for good ears;conducted speech in noise measurement and distortion product emission for good ears;DPOAE test,compare and analyze the results of each test.Results:The extended high frequency hearing threshold test results showed that the hearing threshold of the experimental group was larger than that of the control group at the frequency above 8 kHz,with significant statistical difference(p<.01).The results of speech audiometry under noise showed that the signal-to-noise ratio loss in the experimental group was greater than that in the control group,with a significant statistical difference(p<.01).The results of otoacoustic emission showed that the signal-to-noise ratio of the experimental group was lower than that of the control group at the frequency of 6 kHz and above,with a statistically significant difference(p<.01).There is a correlation between pure tone audiometry and DPOAE test results at high frequencies(6 kHz:p<.0001,r=-.478;8 kHz:p<.0001,r=-.491);There was a correlation between speech audiometry and DPOAE test results under noise(p=.031,r=-.299).Conclusions:Compared with the control group,the extended high frequency pure tone hearing threshold increased or could not be elicited in the experimental group,speech recognition ability decreased significantly under noise,DPOAE was normally elicited but signal-to-noise ratio decreased,and there was a certain correlation between them.The above three audiological examination methods have a certain reference value for early recognition of hidden hearing loss.
文摘Objective To detect early signs of noise-induced hearing loss(NIHL) in military pilots without hearing complaints. Methods Pure tone audiometry and acoustic reflex thresholds were tested in 36 military pilots (72 ears) with noise exposure history but no complaints of hearing loss. Conventional test frequencies (0.25-8 kHz) and extended high frequencies (EHF, 10 and 12.5 kHz) were included in audiometry. White noise and pure tones at 0.5, 1, 2, and 4 kHz were used for acoustic reflex tests. Twenty normal hearing subjects(40 ears) with no exposure to occupational noise were used as controls. Results Pure tone thresholds at all conventional frequencies and at EHFs were elevated in the pilots, with the maximum shift at 4 kHz, compared with controls (p < 0.01). The pilots also showed elevated ART to white noise and decreased differentials between white noise and pure tone ARTs (p< 0.01). Conclusion Early signs of NIHL are present in some symptom-free military pilots. High frequency hearing threshold shift, elevated white noise ART and decreased differential between white noise and pure tone ARTs may be objective indicators of early NIHL.
文摘Migraine,a moderate to severe chronic headache occurring on one or both sides,is a common disease affects young people.Although hearing loss in subjects with migraine is not rare,the correlation of migraine with hearing loss is not clear.In this study,we examined hearing loss in young migraine subjects to determine if migraine may be a factor in causing cochlear dysfunction.Seven college students with migraine and three age matched subjects without history of migraine were assessed using extended high frequency audiometry and distortion product otoacoustic emissions(DPOAEs).There was no significant difference in regular audiomeiry threshold between the migraine group and the control group.However,high frequency audiometry(9-16 kHz) showed thresholds at 25 dB nHL or higher in six out of twenty ears in the migraine group.The amplitude of DPOAEs were reduced for more than 10 dB in the migraine group in comparison with the control group.These data suggest that migraine may affect cochlear dysfunction evidenced by the reduced amplitude of DPOAE and high frequency pure-tone audiometry.
