Speech intelligibility improvement of cochlear implant using release of masking

Abstract

This research emphasis on an increase in speech intelligibility due to the influence release of masking phenomena as well as testing a variety of enhancement techniques to further improve speech intelligibility. Experiments carried out by listening to the sentence stimuli respondents after those respondents are required to rewrite the stimuli. After that assessment percent correct word for each experiment. Based on research that has been done then some conclusions can be drawn that the influence release of masking has demonstrated an increase in speech intelligibility from the first trial to the second trial of ±7.9%. Of the eight signal enhancement techniques are used, Spectral Substraction still showed the best result that is 2.57499 dB in measuring the results of the second experiment a mixture of stimuli 20 and12.