Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 5 de 5
Filter
Add more filters










Database
Language
Publication year range
2.
J Am Acad Audiol ; 7(1): 49-56, 1996 Jan.
Article in English | MEDLINE | ID: mdl-8718492

ABSTRACT

The Department of Veterans Affairs (VA) compact disc (VA-CD) Tonal and Speech Materials for Auditory Perceptual Assessment, Disc 1.0 contains three dichotic speech tests. Two of them, namely, dichotic digits and dichotic synthetic sentences, are tasks that are easily and accurately performed by young normal listeners. The third test, dichotic nonsense syllables, is a more difficult task for normal listeners to perform well. Few data have been gathered from use of the VA-CD with subjects other than young adults with normal hearing sensitivity. This account is about 19 elderly patients with hearing loss in a VA long-term care facility and how they performed on the trio of dichotic tasks on the disc. The digits, sentences, and syllables were presented at 80 dB SPL in a dichotic format requiring two responses to each trial. Trials using syllables were also done at 90 dB SPL to quantify the effects of hearing loss. Digits were recognized better than sentences; both were recognized better than syllables, and this was true for both ears. Compared to results from young listeners, correct responsiveness for older people was most reduced on the syllable task, but performance on dichotic sentences was also reduced. The results corroborate previous reports that suggest that many aging auditory systems do not process dichotic nonsense syllables as well as younger ones. The results also suggest that the dichotic procedures on the VA-CD provide a useful continuum of difficulty for the clinician and investigator.


Subject(s)
Aged , Dichotic Listening Tests , Speech Perception , Functional Laterality , Humans , Middle Aged , Speech Discrimination Tests
3.
J Am Acad Audiol ; 5(4): 243-7, 1994 Jul.
Article in English | MEDLINE | ID: mdl-7949296

ABSTRACT

One test of dichotic listening utilizing nonverbal stimuli is included on the VA-CD Tonal and Speech Materials for Auditory Perceptual Assessment, Disc 1.0. It is a test using three tone complexes that meet the definition of musical chords. The dichotic chords were included as a complement to the three dichotic speech procedures on the VA disc because musical chords may depend on right hemisphere brain function in a manner at least related to the way speech depends on left hemisphere organization/activity. Normative data were obtained from 120 normal-hearing listeners at nine testing centers in the United States. The three tone chords were presented dichotically under two onset time conditions, simultaneous and 90-msec onset time stagger, and three presentation levels, 70, 80, and 90 dB SPL. In general, subjects could identify the dichotically presented chords about 60 percent of the time in each ear. In addition, onset time relationships and presentation levels did not greatly affect accuracy. Overall, subject performance was similar to that noted by others and at levels that should allow lesion effects to be sought.


Subject(s)
Auditory Perception , Dichotic Listening Tests , Music , Brain/physiology , Functional Laterality/physiology , Humans
4.
J Am Acad Audiol ; 5(4): 248-54, 1994 Jul.
Article in English | MEDLINE | ID: mdl-7949297

ABSTRACT

Three tests of dichotic listening utilizing speech signals as stimuli are included on the VA-CD Tonal and Speech Materials for Auditory Perceptual Assessment, Disc 1.0. They include a dichotic monosyllabic digits task, a dichotic synthetic sentences task, and a dichotic nonsense syllable (CV) task. Since the materials were specially recorded or created and recorded for use on the VA-CD, normative data were collected at nine universities/medical centers in the United States involving 120 young listeners. Data revealed that these listeners had little difficulty correctly identifying digits or synthetic sentences when they were presented at 50-70 dB HL in a dichotic format requiring two responses to each trial. At the same presentation levels and under two onset-time conditions (0- and 90-msec onset stagger), correct responsiveness was less frequent when the stimuli were dichotic CVs. However, scores fell in ranges consistent with previous studies and useful for seeking lesion effects. Although careful definition of stimuli, standardization of materials, and the relative stability offered by audio compact disc technology were prime reasons for making the VA-CD, another goal was to offer the clinician-researcher a range of difficulty among the procedures on the disc. Data from the normative trials using dichotic speech signals suggest that the goal has been accomplished.


Subject(s)
Dichotic Listening Tests , Speech Perception , Compact Disks , Dominance, Cerebral , Functional Laterality , Humans
5.
Scand Audiol Suppl ; 15: 81-93, 1982.
Article in English | MEDLINE | ID: mdl-6955930

ABSTRACT

Twenty subjects with abnormal auditory brainstem responses (ABR) and diagnosed brainstem lesion or disease were studied. Normal listeners were used as controls. The objective of the project was to examine the relationship of the particular ABR patterns exhibited by these subjects to the binaural masking level differences (MLD) and transbrainstem acoustic reflex (AR) patterns yielded by the same subjects. Patients whose ABR abnormalities commenced with brainstem potentials I, II, or III had small or no MLD and absent or abnormal AR. Patients whose ABR abnormalities commenced with brainstem potentials IV or V yielded normal MLD and AR behavior. Most important, these findings suggest that MLD size is influenced by activity which also contributes importantly to the development of the early auditory brainstem potentials.


Subject(s)
Auditory Perception/physiology , Brain Stem/physiology , Perceptual Masking/physiology , Reflex, Acoustic , Adult , Aged , Audiometry, Evoked Response , Auditory Pathways/physiology , Auditory Threshold/physiology , Brain Diseases/diagnosis , Brain Diseases/psychology , Cranial Nerve Diseases/diagnosis , Female , Humans , Loudness Perception/physiology , Male , Middle Aged , Pitch Perception/physiology , Speech Perception/physiology , Vestibulocochlear Nerve/physiology
SELECTION OF CITATIONS
SEARCH DETAIL
...