@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{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}
}
@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}
}