Abstract
The common factor in a majority of these voice therapies is that they aim at changing the pitch and focus their attention on achieving an optimum pitch. A review of the literature on the methods of locating optimum pitch, which is an important step in most of the voice therapies, shows that a majority of these are subjective. The methods of eliciting optimum pitch are also subjective and have their limitations. Out of the limitations of the present voice improving techniques and the belief that a majority of the voice disorders can be treated by changing the pitch thereby providing optimum frequency and a felt need for a technique which provided a better model than mere auditory or visual, arouse this technique of isochrenal tone stimulation. The. present study evolved techniques of voice therapy by isochronal stimulation and tested its usefulness in 35 cases with a variety of voice problems.