The purpose of the present study was to suggest the trends and directions of future research in the field of cochlear implants (CIs) by synthesizing the related articles in the field. A total of 168 articles published between 2000 and 2011 was examined in light of time and a type of journals which have been previously published, main topics of research, research subjects and research methodology. The results of this study were as follows: First, research on CI were published in a total of 23 journals. Especially, they were concentrated in Korean Journal of Otorhinolaryngology-Head and Neck Surgery, Journal of Speech-Language & Hearing Disorders, Audiology and Journal of the Korean Society of Speech Sciences. Second, main topics of the research were auditory performance, articulation and phonology and language development. Third, research subjects in most studies were children. Fourth, investigational studies were much more than the experimental studies. Based on these results, implications for future studies on CI were discussed in this paper.
This work is based on the master's thesis of the first author.Objectives: The purpose of this study was to investigate the effect of respiration trainers on voice enhancement during a vocal aerobic treatment (VAT) program developed for holistic voice therapy. Methods: This study consisted of four patients (3 females and 1 male) diagnosed with hyperfunctional dysphonia. The program involved activities including relaxation, breathing, and phonation exercises, as well as a speaking stage. In order to examine the degree of voice improvement, the changes in the acoustic and aerodynamic parameters were compared pre and post intervention. Voice questionnaires and an auditory evaluation were also evaluated using a pre-post process. Results: As a result of this program, each of the subject's pitch and speaking fundamental pitch increased overall. The pitch range was widened, and their voice quality improved based on the reduced values of their acoustic parameters. In addition, the aerodynamic parameters and breathing ability of the subjects improved. The Voice Handicap Index of the subjects decreased and their Korean-Voice Related Quality of Life increased. Moreover, their voice satisfaction also improved. The subjects were more comfortable and projected a softer voice. The overall auditory voice improved. Conclusion: The VAT program using respiration trainers was found to be effective in improving the voice of subjects with hyperfunctional dysphonia, and therefore it can be considered a useful program in the voice therapy field. In the future, if the program is applied to a large sample of heterogeneous subjects, more useful information for voice therapy can be obtained.
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