BACKGROUND: Ultrasound has shown promise as visual feedback in remediation of /r/. AIMS: To compare treatment for /r/ with and without ultrasound. METHODS & PROCEDURES: A Canadian English-speaking adolescent participated in a case study with a no treatment baseline, alternating treatment blocks with and without ultrasound and a final no treatment period. OUTCOMES & RESULTS: Formant values and trained listener ratings of speech samples indicated improvement in /r/ production, particularly after the introduction of ultrasound. CONCLUSIONS: Ultrasound appeared to facilitate the acquisition of /r/ for the participant. Large-scale studies are needed to evaluate ultrasound further.
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Modha et al. (2008) studied this question.
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