Altered auditory feedback (AAF) has been used since the 1960s with people who stutter to reduce stuttering behaviors.
Altered auditory feedback (AAF) has been used since the 1960s with people who stutter to reduce stuttering behaviors. Currently, the most utilized types of AAF are delayed auditory feedback (DAF) and frequency altered feedback (FAF). DAF and FAF technologies are now available in portable prosthetic devices. The most advanced devices are worn in one ear and are indistinguishable from hearing aids. Prosthetic AAF devices capture the speaker’s speech signal, digitally alter the signal and then re-introduce the altered speech signal into the speaker’s ear.
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