40 Hz와 80 Hz의 변조주파수에서 기·골도 청성지속반응역치와 순음청력역치 비교

서지정보

· 발행기관 : 한국청각언어재활학회
· 수록지 정보 : 청능재활 / 1권 / 1호
· 저자명 : 한정, 조소현, 조수진, 구호림

목차

INTRODUCTION
MATERIALS AND METHODS
RESULTS
DISCUSSION AND CONCLUSIONS
REFERENCES

초록

청성지속반응(auditory steady state responses, ASSRs)은 이음향방사(otoacoustic emissions, OAEs)나 청성뇌간반응(auditory brainstem responses, ABRs) 등과 같은 객관적인 청력검사(objective hearing test)의 한계점 보완하고, 주관적인 청력검사(subjective hearing test)가 어
려운 성인 환자나 난청의 조기발견 및 중재(early hearing detection and interpretation, EHDI)의 중요성이 강조되면서 영·유아의 주파수별 청력역치를 비교하기 위해서 고안된 방법 중 하나이다.
ASSRs에 영향을 미치는 여러 가지 요소 중 변조주파수(modulation frequency)는 변조빈도에 해당하는 의미로 변조주파수가 증가할수록 ASSRs의 진폭(amplitude)은 감소하지만, 특정 지점인 40 Hz와 90 Hz 부근에서는 증가한다

영어초록

BC ASSR is hardly used, but it is appropriately used infants and children who have disorder with external or internal ear made the use of each wave of BC ASSR. So this study have showed not only frequency modulation of 80 Hz but also frequency modulation of 40 Hz which is not researched occasionally. Moreover, I have studied groups which are suffer from hearing, divided them used measurement between the sensory neural hearing loss and the conductive hearing loss, evaluated AC ASSR and BC ASSR and compared the number of PTA. Methods：The subjects consisted of normal adults (using 10 right ears), sensory-neural
hearing loss (SNHL using 10 right ears), conductive hearing loss (joined 6 right ears). PTA is GSI (Grason- stacller Inc.) 61 Audiometer, and ASSRs is AUDERA system using mixed modulation which is consists of frequency modulation. Results：Results were as follows. First, a comparison with AC ASSR and AC PTA, measuring AC ASSR-AC PTA in 80 Hz is smaller number than in 40 Hz. Furthermore, the number of AC ASSR-AC PTA has high numerical value in normal group, the sensory neural hearing impaired is the second, the conductive hearing loss is the third. Secondly, Comparing BC ASSR-BC PTA, BC ASSR-BC PTA in 80 Hz is smaller than BC ASSR-BC PTA in 40 Hz, when measuring numeral value. The numeral value is much more smaller as the condition differs. Finally, The average of ASSR ABG-PTA ABG is much more smaller than the 40 Hz and 80 Hz. It couldn’t be matter of distinction. Conclusions：We should standardize ASSRs and PTA. and discover lots of evidence which support those experiments. Infants and Children have to be taken airway examination to check their external ear-disorder and internal eardisorder, as well. It is rare cases that we take a density of marrow examination in each frequency to support various studies.

KEY WORDS：ASSR·Hearing thresholdz·Modulation frequency.

참고자료

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