摘要:

The accepted instrument for calibrating the bone-conduction section of an audiometer is the artificial mastoid. For a variety of reasons, alternative calibration methods are in general use. Three common methods are: (1) the input voltage method; (2) the real-ear threshold method using normal-hearing listeners; and (3) the real-ear threshold method using subjects with sensorineural hearing loss. The present investigation compared these methods for both accuracy and efficiency.There were no significant differences in accuracy found among the three calibration methods. Substantial differences in efficiency were noted, however. When accuracy and efficiency are considered, the input voltage method appears to be the best alternative method for calibrating the bone-conduction system of an audiometer.

ISSN:0196-0202    

出版商:OVID    

年代:1981

数据来源: OVID

摘要:

This investigation examined the effects of the aging process on the adequacy of Eustachian tube function. Older adults presenting normal hearing sensitivity and sensorineural hearing loss and normally hearing young adults served as subjects. Eustachian tube function was assessed using electroacoustic immittance measurement. Tympanograms were analyzed relative to pressure and function (amplitude) changes after Eustachian tube testing. One-way analyses of variance and χ2analyses revealed no significant differences between groups and no significant relationships between group membership and tympanometric measures.

ISSN:0196-0202    

出版商:OVID    

年代:1981

数据来源: OVID

摘要:

Data routinely collected in audiological evaluations were used to predict speech discrimination scores in patients with varying degrees of sensorineural hearing loss. Pure-tone threshold at 2000 Hz and age squared (age') gave the best prediction in the stepwise multiple regression analysis. Slope of the hearing loss did not aid in the prediction. Expected speech discrimination scores for patients with mild-to-severe hearing losses in the age range from 14 to 94 are included, and their use is discussed.

ISSN:0196-0202    

出版商:OVID    

年代:1981

数据来源: OVID

摘要:

We compared the accuracy of seven methods of hearing loss prediction by the acoustic reflex in 60 subjects. The methods were two versions of Sensitivity Prediction by Acoustic Reflex, four regression equations, and the bivariate plot coordinate system. Accuracy of hearing loss prediction exceeded 60% for all methods. In general, the bivariate plot system most accurately identified hearing loss. Regression equations tended to under estimate loss. Sensitivity prediction by the acoustic reflex and the bivariate plot system tended to over predict loss. Accuracy of prediction was usually reduced in older subjects and in subjects with minor immittance abnormalities. The effect of age and immittance abnormalities, however, varied among methods.

ISSN:0196-0202    

出版商:OVID    

年代:1981

数据来源: OVID

摘要:

The Synthetic Sentence Identification test with ipsilateral competing message was presented to six groups of six normal-hearing subjects ranging in age from 8 through 25 years to assess whether performance improved as age increased. The scores improved for all age groups as the message-to-competition ratio decreased. Scores also improved as age increased. The interaction effect between age and message-to-competition ratio was significant (p <0.001). The results support previous findings and give strong evidence to support there being a maturation factor involved in auditory processing. Establishing normative data for normal-hearing children at various ages as well as data for children having central problems would now be required to make the Synthetic Sentence identification test with ipsilateral competing message a useful test with children.

ISSN:0196-0202    

出版商:OVID    

年代:1981

数据来源: OVID

摘要:

Eight patients with variable hearing after meningitis are presented. Four patients had hadHaemophilus influenzaemeningitis, three had meningococcal meningitis, and in one instance, the etiological agent remained unknown. In five cases, the hearing fluctuated markedly, probably because of endolymphatic hydrops. In three cases, the hearing deteriorated temporarily after a free period of 6 to 1 2 months.

ISSN:0196-0202    

出版商:OVID    

年代:1981

数据来源: OVID

摘要:

An unlimited, portable, text-to-speech synthesizer, Synte 2, is introduced. Since 1977, it has been applied and tested to the rehabilitation of the deaf and others unable to speak as well as to the rehabilitation of the blind. It has been shown to be beneficial to those people. With this system, it seems possible to markedly increase the concept capacity of the deaf.In audiology, it provides a new way to produce objective, everlasting, and ever-repeatable ordinary and sensitized speech tests. Further, the apparatus has innumerable applications in audiological and speech pathological research. This kind of speech synthesizer has come to stay in clinical use.General principles of the use of the synthesizer and experiences over 3 years in rehabilitation and medical research are discussed.

ISSN:0196-0202    

出版商:OVID    

年代:1981

数据来源: OVID

摘要:

Acoustic reflex and reflex decay results for 58 patients having Meniere's disease and for 58 patients having VIIIth nerve tumors were reviewed. Reflex decay was analyzed relative to decay in the first 5 sec as suggested by Anderson et al. (2) and over the full 10 sec of the stimulus as described by Jerger et al. (5). When reflex decay was observed, decay to one-half or less amplitude almost always occurred during the first 5 sec of the 10-sec stimulus.

ISSN:0196-0202    

出版商:OVID    

年代:1981

数据来源: OVID