摘要:

Twenty-four elderly subjects were divided into three groups on the basis of response criterion in a signal-detection task. The groups, representing strict, lax, and intermediate listeners, were then compared on the basis of performance on several conventional speech audiometric measures. When the data were corrected for degree of hearing loss, group differences were not significant. Thus, conventional speech audiometric results did not appear to be significantly influenced by response criterion.

ISSN:0196-0202    

出版商:OVID    

年代:1988

数据来源: OVID

摘要:

Asymmetry in the auditory brain stem evoked response (ABR) and its effect on measurements of binaural interaction were studied. Monaural and binaural ABRs were recorded from 24 normal hearing subjects at two sensation levels: 70 and 50 dB. Monaural responses were judged to be asymmetrical when the right response minus the left response resulted in a difference trace which was significantly greater than the level of the background noise in the ABR. It was found that sensation level significantly affected the frequency of monaural response asymmetry and that the amplitude of the derived binaural interaction component (BIC) was positively correlated with the degree of asymmetry present. Offsetting the asymmetry by introducing an interaural intensity difference resulted in a significant reduction in the amplitude of the BIC. It was concluded that the BIC is affected by factors other than those which can be attributed solely to binaural interaction.

ISSN:0196-0202    

出版商:OVID    

年代:1988

数据来源: OVID

摘要:

The purposes of this study were to determine (1) the contribution of low-frequency activity in the auditory brain stem response (ABR) to the binaural interaction component, and (2) an optimal set of parameters for recording the binaural interaction component. ABRs were recorded from 12 adult subjects with normal hearing using 1000 Hz tone pips at three stimulation rates (10, 25, and 50/sec) and two physiological filters (150–3000 and 30–3000 Hz). The latencies of wave V in the sum of the left and right monaural responses [V(L + R)] were shorter with the 150 to 3000 Hz filter than with the 30 to 3000 Hz filter, whereas the amplitudes of V(L + R) and peak A of the binarual interaction component were similar. The amplitudes of V(L + R) and A were larger for 50/sec than for 10 or 25/sec, but the amplitude ratio of peak A to wave V(L + R) was not different. In conclusion, (1) the activity between 30 to 150 Hz did not enhance the binaural interaction component, and (2) the largest and most reliable binaural interaction component was recorded with a rate of 50/sec and a filter setting of 150 to 3000 Hz.

ISSN:0196-0202    

出版商:OVID    

年代:1988

数据来源: OVID

摘要:

A case study of the first deaf-blind patient implanted with a Nucleus 22 channel cochlear prosthesis is presented. The patient's preimplant evaluation data, using a powerful hearing aid and vibro-tactile device, are compared with results obtained 8 months postimplant. Preimplant testing indicated no consistent response to sound. Postimplant testing showed ability to comprehend some open set speech with hearing alone through the cochlear implant including ability to utilize the telephone without a code system. The postimplant data suggest potential benefit for other postlingually deaf-blind individuals from multichannel cochlear stimulation.

ISSN:0196-0202    

出版商:OVID    

年代:1988

数据来源: OVID

摘要:

The value of 20 years of attempts to control the causes of hearing impairment in children should now be observable. If they have been successful there can be expected to be a change in the prevalence of some etiologies, a variation in the proportions of all remaining etiologies, and a reduction in the prevalence of severe and profound impairments. An investigation of these expectations has been conducted by surveying children fitted with hearing aids in Australia. The results of this investigation highlight development of a number of new trends, including virtual elimination of maternal rubella and Rh incompatibility as causes of impairment, together with a new emphasis on the fitting of hearing aids for mild and conductive impairments.

ISSN:0196-0202    

出版商:OVID    

年代:1988

数据来源: OVID

摘要:

Hearing impairment in older adults is associated with psychological and social difficulties. The goal of hearing aid fitting is to reduce the perceived handicap resulting from the hearing loss. Measures of self-perceived handicap are being increasingly incorporated into the clinicians armamentarium as an objective measure of the outcome of intervention. Eighteen elderly hearing-impaired males and their spouses responded to the Hearing Handicap Inventory for the Elderly (HHIE) prior to and following 1 year of hearing aid provision. Our findings revealed a significant reduction in the perceived emotional and social effects of hearing impairment following 1 year of hearing aid use. The reduction in perceived handicap, as measured using the HHIE, was greater for the hearing aid users than for their spouses. The findings attest to the construct validity of the HHIE as a measure of hearing aid benefit.

ISSN:0196-0202    

出版商:OVID    

年代:1988

数据来源: OVID

摘要:

Several cases illustrating potential pitfalls in neurotologic diagnosis from the viewpoint of the otologist are presented. The role of auditory brain stem response testing is specifically emphasized in cases with discordant audiologic and radiographic findings. Included are one case of a “false negative” ABR in a patient with an intracanalicular acoustic neuroma, a case of a “false positive” CT scan in a patient with Meniere's disease, and a case of a patient with normal hearing in whom an acoustic neuroma was discovered serendipitously.

ISSN:0196-0202    

出版商:OVID    

年代:1988

数据来源: OVID

ISSN:0196-0202    

出版商:OVID    

年代:1988

数据来源: OVID

ISSN:0196-0202    

出版商:OVID    

年代:1988

数据来源: OVID

ISSN:0196-0202    

出版商:OVID    

年代:1988

数据来源: OVID