PROCESSING OF ELECTRICAL AND AUDIO SIGNALS

摘要

There is described an apparatus and method for enhancing the intelligibility of speech comprising means (20) to generate an electrical signal representative of a detected audio signal, means (40) for identifying a plurality of periodic elements comprising said electrical signal, and means (22) for selectively altering the frequency and/or number of said periodic elements in response to signals characteristic of the periodic elements identified so as to thereby generate a modified output signal. There is also described an apparatus and method for processing an electrical signal comprising means for detecting peaks in said electrical signal, means for storing peak-to-peak elements of said electrical signal and means for processing said electrical signal by manipulating one or more of said peak-to-peak elements. There is also described an apparatus and method for detecting turning points within an electrical signal comprising means to periodically sample said electrical signal, means to calculate the difference in amplitude between successive samples, and means to detect when successive values of the said difference in amplitude change in sign.