System for simulated in situ measurement of hearing aids.
نویسندگان
چکیده
منابع مشابه
NIST System for Measuring the Directivity Index of Hearing Aids under Simulated Real-Ear Conditions
The directivity index is a parameter that is commonly used to characterize the performance of directional hearing aids, and is determined from the measured directional response. Since this response is different for a hearing aid worn on a person as compared to when it is in a free field, directivity index measurements of hearing aids are usually done under simulated real-ear conditions. Details...
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We have studied 131 patients (over 12 y/o) for hearing aids evaluation by the Noise Impulse Hearing Test using the fitting system TR 60 and have compared the test results with the subjective estimation of the patients wearing hearing aids. The judgement for selection of hearing aids by TR 60 is made by measuring most comfortable level (MCL) on the condition of wearing hearing aids, using narrow...
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A reciprocal measurement procedure to measure the acoustic feedback path in hearing aids is investigated. The advantage of the reciprocal measurement compared to the direct measurement is a significantly reduced sound pressure in the ear. The direct and reciprocal measurements are compared using measurements on a dummy head with adjustable ear canals, different earmolds, and variations in the o...
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When comparing music to speech, there are four essential physical differences that warrant consideration during a hearing aid (or cochlear implant) fitting. Understanding these differences and selecting appropriate hearing aid circuitry will help to optimize the enjoyment of music for the hard-of-hearing listener. This applies equally to those who are musicians as to those who like to listen to...
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چکیده پلاتین، فلزی نجیب، پایدار و گران قیمت با خاصیت کاتالیزوری زیاد است که کاربرد های صنعتی فراوانی دارد. کمپلکس های پلاتین(ii) به عنوان دارو های ضد سرطان شناخته شدند و در شیمی درمانی بیماران سرطانی کاربرد دارند. خاصیت کاتالیزوری و عملکرد گزینشی پلاتین مستقیماً به اندازه و- شکل ماده ی پلاتینی بستگی دارد. بعضی از نانو ذرات فلزی در سطح مشترک مایع- مایع سنتز شده اند، اما نانو ساختار های پلاتین ب...
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ژورنال
عنوان ژورنال: Journal of the Acoustical Society of Japan (E)
سال: 1984
ISSN: 0388-2861,2185-3509
DOI: 10.1250/ast.5.95