Amplifier filter system for speech therapy

摘要

Am amplifier filter system for speech therapy applications. This apparatus combines a direct channel amplifier and two band pass filter amplifiers such that selected phonemes (speech sounds) of the spoken word can be enhanced so that a speaker can be taught corrections for various articulation deficiencies. Through the choice of optimum center frequencies in one-octave bandpass filters for various phonemes of a given language, a selected portion of the acoustic spectrum within the language can be enhanced to achieve this result. The apparatus is highly portable, light weight and is affordable. It provides for inputs from microphones and/or tape recorders, and outputs to earphones, loudspeakers, vibrators, and/or tape recorders. Because of the unique design of this unit, it is "user friendly" thus making it useful in both the presence of a clinician and by a client during his or her own therapy. A particular response at each of the center frequencies is selected to have a 12-14 dB slope which has been found to provide the optimum enhancements of the acoustic spectra of the various phonemes.