A graph model based on single character operations is developed for constructing the median of two strings X and Y. Vertices represent stages of median construction and edges correspond to processing one or both characters of the two strings. In this paper, the median is defined as a string having the median character frequency of each character over the two strings and which minimizes the maxi...

background and aim: it has been several decades since the technology of frequency lowering (fl) has been proposed. however, primary research has revealed no benefits regarding the use of this technique. currently, new methods for fl and improvement of perception of speech and fricative sounds have led to the application of these methods by numerous companies to produce hearing aids. in this stu...