@article{BrunnerGhoshHooleetal.2011,
  author    = {Brunner, Jana and Ghosh, Satrajit and Hoole, Philip and Matthies, Melanie and Tiede, Mark and Perkell, Joseph},
  title     = {The influence of auditory acuity on acoustic variability and the use of motor equivalence during adaptation to a perturbation},
  series = {Journal of speech, language, and hearing research},
  volume    = {54},
  journal   = {Journal of speech, language, and hearing research},
  number    = {3},
  publisher = {American Speech-Language-Hearing Assoc.},
  address   = {Rockville},
  issn      = {1092-4388},
  doi       = {10.1044/1092-4388(2010/09-0256)},
  pages     = {727 -- 739},
  year      = {2011},
  abstract  = {Purpose: The aim of this study was to relate speakers' auditory acuity for the sibilant contrast, their use of motor equivalent trading relationships in producing the sibilant /integral/, and their produced acoustic distance between the sibilants /s/ and /integral/. Specifically, the study tested the hypotheses that during adaptation to a perturbation of vocal-tract shape, high-acuity speakers use motor equivalence strategies to a greater extent than do low-acuity speakers in order to reach their smaller phonemic goal regions, and that high-acuity speakers produce greater acoustic distance between 2 sibilant phonemes than do low-acuity speakers. Method: Articulographic data from 7 German speakers adapting to a perturbation were analyzed for the use of motor equivalence. The speakers' produced acoustic distance between /s/ and /integral/ was calculated. Auditory acuity was assessed for the same speakers. Results: High-acuity speakers used motor equivalence to a greater extent when adapting to a perturbation than did low-acuity speakers. Additionally, high-acuity speakers produced greater acoustic contrasts than did low-acuity-speakers. It was observed that speech rate had an influence on the use of motor equivalence: Slow speakers used motor equivalence to a lesser degree than did fast speakers. Conclusion: These results provide support for the mutual interdependence of speech perception and production.},
  language  = {en}
}
@article{BrunnerFuchsPerrier2011,
  author    = {Brunner, Jana and Fuchs, Susanne and Perrier, Pascal},
  title     = {Supralaryngeal control in Korean velar stops},
  series = {Journal of phonetics},
  volume    = {39},
  journal   = {Journal of phonetics},
  number    = {2},
  publisher = {Elsevier},
  address   = {London},
  issn      = {0095-4470},
  doi       = {10.1016/j.wocn.2011.01.003},
  pages     = {178 -- 195},
  year      = {2011},
  abstract  = {The aim of this study was to investigate the supralaryngeal control of the production of the Korean three-way contrast in velar stops. First, an EMA-experiment with three Korean speakers was carried out, and the kinematic properties of the tongue back were analyzed (length of the deceleration phase of the movement, peak velocity, peak acceleration, amplitude and duration of the looping movement during consonantal closure, and angle of incidence between tongue and palate at contact onset). To understand the potential motor control mechanisms underlying the production of the three-way contrast, the target hypothesis, which suggests that articulator movements in stops are directed towards a target at or beyond the palate, was evaluated by comparing its predictions with our experimental findings. Evidence was found in support of this hypothesis. Hence, the hypothesis was further explored in a modeling study. The results suggest that variability in the articulatory parameters can be explained by a single control parameter, namely the target position of the tongue. In a third step the Korean velar stops were simulated by varying the target position. The results show that the main trends of the simulated consonants are in good agreement with the experimental findings.},
  language  = {en}
}
@article{BrunnerHoole2012,
  author    = {Brunner, Jana and Hoole, Phil},
  title     = {Motor equivalent strategies in the production of german/integral/ under perturbation},
  series = {Language and speech},
  volume    = {55},
  journal   = {Language and speech},
  number    = {7},
  publisher = {Sage Publ.},
  address   = {London},
  issn      = {0023-8309},
  doi       = {10.1177/0023830911434098},
  pages     = {457 -- 476},
  year      = {2012},
  abstract  = {The German sibilant /integral/ is produced with a constriction in the postalveolar region and often with protruded lips. By covarying horizontal lip and tongue position speakers can keep a similar acoustic output even if the articulation varies. This study investigates whether during two weeks of adaptation to an artificial palate speakers covary these two articulatory parameters, whether tactile landmarks have an influence on the covariation and to what extent speakers can foresee the acoustic result of the covariation without auditory feedback. Six German speakers were recorded with EMA. Four of them showed a covariation of lip and tongue, which is consistent with the motor equivalence hypothesis. The acoustic output, however, does not stay entirely constant but varies with the tongue position. The role of tactile landmarks is negligible. To a certain extent, speakers are able to adapt even without auditory feedback.},
  language  = {en}
}
@misc{BrunnerHoole2017,
  author    = {Brunner, Jana and Hoole, Phil},
  title     = {Motor equivalent strategies in the production of German /ʃ/ under perturbation},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-403229},
  pages     = {20},
  year      = {2017},
  abstract  = {The German sibilant /integral/ is produced with a constriction in the postalveolar region and often with protruded lips. By covarying horizontal lip and tongue position speakers can keep a similar acoustic output even if the articulation varies. This study investigates whether during two weeks of adaptation to an artificial palate speakers covary these two articulatory parameters, whether tactile landmarks have an influence on the covariation and to what extent speakers can foresee the acoustic result of the covariation without auditory feedback. Six German speakers were recorded with EMA. Four of them showed a covariation of lip and tongue, which is consistent with the motor equivalence hypothesis. The acoustic output, however, does not stay entirely constant but varies with the tongue position. The role of tactile landmarks is negligible. To a certain extent, speakers are able to adapt even without auditory feedback.},
  language  = {en}
}
@article{WeirichLanciaBrunner2013,
  author    = {Weirich, Melanie and Lancia, Leonardo and Brunner, Jana},
  title     = {Inter-speaker articulatory variability during vowel-consonant-vowel sequences in twins and unrelated speakers},
  series = {The journal of the Acoustical Society of America},
  volume    = {134},
  journal   = {The journal of the Acoustical Society of America},
  number    = {5},
  publisher = {American Institute of Physics},
  address   = {Melville},
  issn      = {0001-4966},
  doi       = {10.1121/1.4822480},
  pages     = {3766 -- 3780},
  year      = {2013},
  abstract  = {The purpose of this study is to examine and compare the amount of inter-speaker variability in the articulation of monozygotic twin pairs (MZ), dizygotic twin pairs (DZ), and pairs of unrelated twins with the goal of examining in greater depth the influence of physiology on articulation. Physiological parameters are assumed to be very similar in MZ twin pairs in contrast to DZ twin pairs or unrelated speakers, and it is hypothesized that the speaker specific shape of articulatory looping trajectories of the tongue is at least partly dependent on biomechanical properties and the speaker's individual physiology. By means of electromagnetic articulography (EMA), inter-speaker variability in the looping trajectories of the tongue back during /VCV/ sequences is analyzed. Results reveal similar looping patterns within MZ twin pairs but in DZ pairs differences in the shape of the loop, the direction of the upward and downward movement, and the amount of horizontal sliding movement at the palate are found.},
  language  = {en}
}
@article{BrunnerHoolePerrier2011,
  author    = {Brunner, Jana and Hoole, Phil and Perrier, Pascal},
  title     = {Adaptation strategies in perturbed /s/},
  series = {Clinical linguistics \& phonetics},
  volume    = {25},
  journal   = {Clinical linguistics \& phonetics},
  number    = {8},
  publisher = {Taylor \& Francis Group},
  address   = {London},
  issn      = {0269-9206},
  doi       = {10.3109/02699206.2011.553699},
  pages     = {705 -- 724},
  year      = {2011},
  abstract  = {The purpose of this work is to investigate the role of three articulatory parameters (tongue position, jaw position and tongue grooving) in the production of /s/. Six normal speakers' speech was perturbed by a palatal prosthesis. The fricative was recorded acoustically and through electromagnetic articulography in four conditions: (1) unperturbed, (2) perturbed with auditory feedback masked, (3) perturbed with auditory feedback available and (4) perturbed after a 2-week adaptation period. At the end of the adaptation, speakers produced more high-frequency noise while either having a higher jaw position or more grooving of the tongue or both. We discuss the potential clinical implications of the results with regard to the role of jaw height and tongue grooving in the treatment of impaired /s/.},
  language  = {en}
}