scholarly journals Identification of stop consonant voicing and place of articulation by listeners with normal hearing and by listeners with mild, moderate, severe, and profound hearing impairments

1980 ◽  
Vol 68 (S1) ◽  
pp. S113-S113
Author(s):  
Deborah Johnson ◽  
Patricia Whaley ◽  
M. F. Dorman ◽  
L. J. Raphael
Keyword(s):  
Stop Consonant ◽  
Normal Hearing ◽  
Hearing Impairments ◽  
Place Of Articulation ◽  
Consonant Voicing

Processing of Cues for Stop Consonant Voicing by Young Hearing-Impaired Listeners

1984 ◽  
Vol 27 (1) ◽  
pp. 112-118 ◽  
Author(s):  
Deborah Johnson ◽  
Patricia Whaley ◽  
M. F. Dorman
Keyword(s):  
Stop Consonant ◽  
Normal Hearing ◽  
Response Variability ◽  
Hearing Impaired ◽  
Hearing Impairments ◽  
Stimulus Uncertainty ◽  
Place Of Articulation ◽  
Auditory Representation ◽  
Cochlear Damage ◽  
Consonant Voicing

To assess whether young hearing-impaired listeners are as sensitive as normal-hearing children to the cues for stop consonant voicing, we presented stimuli from along VOT continua to young normal-hearing listeners and to listeners with mild, moderate, severe, and profound hearing impairments. The response measures were the location of the phonetic boundaries, the change in boundaries with changes in place of articulation, and response variability. The listeners with normal hearing sensitivity and those with mild and moderate hearing impairments did not differ in performance on any response measure. The listeners with severe impairments did not show the expected change in VOT boundary with changes in place of articulation. Moreover, stimulus uncertainty (i.e., the number of possible choices in the response set) affected their response variability. One listener with profound impairment was able to process the cues for voicing in a normal fashion under conditions of minimum stimulus uncertainty. We infer from these results that the cochlear damage which underlies mild and moderate hearing impairment does not significantly alter the auditory representation of VOT. However, the cochlear damage underlying severe impairment, possibly interacting with high signal presentation levels, does alter the auditory representation of VOT.

Perceptual Weighting of Relative Amplitude and Formant Transition Cues in Aided CV Syllables

2001 ◽  
Vol 44 (5) ◽  
pp. 964-974 ◽  
Author(s):  
Mark Hedrick ◽  
Mary Sue Younger
Keyword(s):  
Hearing Loss ◽  
Hearing Aid ◽  
Stop Consonant ◽  
Normal Hearing ◽  
Relative Amplitude ◽  
Formant Transition ◽  
Place Of Articulation ◽  
Anova Model ◽  
The Relationship ◽  
Perceptual Weighting

The current study explored the changes in weighting of relative amplitude and formant transition cues that may be caused by a K-amp circuit. Twelve listeners with normal hearing and 3 listeners with sensorineural hearing loss labeled the stop consonant place of articulation of synthetic consonant-vowel stimuli. Within the stimuli, two acoustic cues were varied: the frequency of the onset of the second and third formant (F2/F3) transitions and the relative amplitude between the consonant burst and the following vowel in the fourth and fifth formant (F4/ F5) frequency region. The variation in the two cues ranged from values appropriate for a voiceless labial stop consonant to a voiceless alveolar stop consonant. The listeners labeled both the unaided stimuli and the stimuli recorded through a hearing aid with a K-amp circuit. An analysis of variance (ANOVA) model was used to calculate the perceptual weight given each cue. Data from listeners with normal hearing show a change in relative weighting of cues between aided and unaided stimuli. Pilot data from the listeners with hearing loss show a more varied pattern, with more weight placed on relative amplitude. These results suggest that calculation of perceptual weights using an ANOVA model may be worthwhile in future studies examining the relationship between acoustic information presented by a hearing aid and the subsequent perception by the listener with hearing loss.

Effect of Relative Amplitude and Formant Transitions on Perception of Place of Articulation by Adult Listeners With Cochlear Implants

1997 ◽  
Vol 40 (6) ◽  
pp. 1445-1457 ◽  
Author(s):  
Mark S. Hedrick ◽  
Arlene Earley Carney
Keyword(s):  
Cochlear Implant ◽  
Stop Consonant ◽  
Normal Hearing ◽  
Frequency Region ◽  
Relative Amplitude ◽  
Speech Processor ◽  
Formant Transition ◽  
Place Of Articulation ◽  
Voiceless Stop ◽  
Response Alternatives

Previous studies have shown that manipulation of a particular frequency region of the consonantal portion of a syllable relative to the amplitude of the same frequency region in an adjacent vowel influences the perception of place of articulation. This manipulation has been called the relative amplitude cue. Earlier studies have examined the effect of relative amplitude and formant transition manipulations upon labeling place of articulation for fricatives and stop consonants in listeners with normal hearing. The current study sought to determine if (a) the relative amplitude cue is used by adult listeners wearing a cochlear implant to label place of articulation, and (b) adult listeners wearing a cochlear implant integrated the relative amplitude and formant transition information differently than listeners with normal hearing. Sixteen listeners participated in the study, 12 with normal hearing and 4 postlingually deafened adults wearing the Nucleus 22 electrode Mini Speech Processor implant with the multipeak processing strategy. The stimuli used were synthetic consonant-vowel (CV) syllables in which relative amplitude and formant transitions were manipulated. The two speech contrasts examined were the voiceless fricative contrast /s/-/∫/and the voiceless stop consonant contrast /p/-/t/. For each contrast, listeners were asked to label the consonant sound in the syllable from the two response alternatives. Results showed that (a) listeners wearing this implant could use relative amplitude to consistently label place of articulation, and (b) listeners with normal hearing integrated the relative amplitude and formant transition information more than listeners wearing a cochlear implant, who weighted the relative amplitude information as much as 13 times that of the transition information.

Lip and Jaw Kinematics in Bilabial Stop Consonant Production

1997 ◽  
Vol 40 (4) ◽  
pp. 877-893 ◽  
Author(s):  
Anders Löfqvist ◽  
Vincent L. Gracco
Keyword(s):  
Control Strategy ◽  
High Velocity ◽  
Stop Consonant ◽  
Movement Variability ◽  
Upper Lip ◽  
Lower Lip ◽  
Vowel Context ◽  
Virtual Target ◽  
Contextual Variability ◽  
Consonant Voicing

This paper reports two experiments, each designed to clarify different aspects of bilabial stop consonant production. The first one examined events during the labial closure using kinematic recordings in combination with records of oral air pressure and force of labial contact. The results of this experiment suggested that the lips were moving at a high velocity when the oral closure occurred. They also indicated mechanical interactions between the lips during the closure, including tissue compression and the lower lip moving the upper lip upward. The second experiment studied patterns of upper and lower lip interactions, movement variability within and across speakers, and the effects on lip and jaw kinematics of stop consonant voicing and vowel context. Again, the results showed that the lips were moving at a high velocity at the onset of the oral closure. No consistent influences of stop consonant voicing were observed on lip and jaw kinematics in five subjects, nor on a derived measure of lip aperture. The overall results are compatible with the hypothesis that one target for the lips in bilabial stop production is a region of negative lip aperture. A negative lip aperture implies that to reach their virtual target, the lips would have to move beyond each other. Such a control strategy would ensure that the lips will form an air tight seal irrespective of any contextual variability in the onset positions of their closing movements.

On the naturalness of stop consonant voicing

1986 ◽  
Vol 22 (1) ◽  
pp. 145-166 ◽  
Author(s):  
John R. Westbury ◽  
Patricia A. Keating
Keyword(s):  
Stop Consonant ◽  
Formal Theory ◽  
Linguistic Theory ◽  
The World ◽  
Articulatory Features ◽  
Consonant Voicing

A long recognized problem for linguistic theory has been to explain why certain sounds, sound oppositions, and sound sequences are statistically preferred over others among languages of the world. The formal theory of markedness, developed by Trubetzkoy and Jakobson in the early 1930's, and extended by Chomsky and Halle (1968), represents an attempt to deal with this problem. It is at least implicit in that theory that sounds are rare when (and because) they are marked, and common when (and because) they are not. Whether sounds are marked or unmarked depends – in the latter version of the theory, particularly – upon the ‘intrinsic content’ of acoustic and articulatory features which define them. There was, however, no substantive attempt among early proponents of the theory to show what it was about the content of particular features and feature combinations that caused them to be marked, and others not.

The Use of Repair Strategies by Children With and Without Hearing Impairment

2002 ◽  
Vol 33 (2) ◽  
pp. 112-123 ◽  
Author(s):  
Tova Most
Keyword(s):  
Hearing Impairment ◽  
Speech Intelligibility ◽  
Expressive Language ◽  
Normal Hearing ◽  
Strategy Training ◽  
Clinical Implications ◽  
Hearing Impairments ◽  
Communication Breakdown ◽  
Age Appropriate ◽  
Different Levels

Purpose: This study examined how students with hearing impairments, having different levels of speech intelligibility, responded to a communication breakdown as compared to students with normal hearing. Method: Participants included 16 students with profound hearing impairment who were assessed as having age-appropriate expressive language (8 with good speech intelligibility and 8 with poor speech intelligibility) and 10 students with normal hearing, ages 11–18 years. The students’ task was to describe pictures and to respond to a series of three clarification requests ("Huh?," "What?," and "I didn’t understand") presented by the examiner. Results: Repetition was the most frequently used strategy by all groups. However, significant differences emerged in the use of other repair strategies among the three groups. The group’s choice of strategies across the three requests also differed significantly. Clinical Implications: Although the groups evidenced similar levels of age-appropriate expressive language, they appeared to differ in its pragmatic use. It was suggested that strategy training programs should consider the speech intelligibility of the speaker and be tailored according to individual needs.

Acoustic correlates of stop consonant voicing in English and Spanish

2012 ◽  
Vol 132 (3) ◽  
pp. 1937-1937
Author(s):  
Olga Dmitrieva ◽  
Amanda A. Shultz ◽  
Fernando Llanos ◽  
Alexander L. Francis
Keyword(s):  
Stop Consonant ◽  
Acoustic Correlates ◽  
Consonant Voicing
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