ɪn hˈɪɹɪŋ ˈeɪdz, fˈiːdbæk ɚɹˈaɪzᵻz wɛn ɐ pˈɑːɹt ʌvðə ɹᵻsˈiːvɚ lˈaʊdspiːkɚ sˈɪɡnəl ɪz kˈæptʃɚd baɪ ðə hˈɪɹɪŋ ˈeɪd mˈaɪkɹəfˌoʊn ˈɛs, ɡˈɛts ˈæmplᵻfˌaɪd ɪnðə dɪvˈaɪs ænd stˈɑːɹts tə lˈuːp ɚɹˈaʊnd θɹuː ðə sˈɪstəm.
In hearing aids, feedback arises when a part of the receiver (loudspeaker) signal is captured by the hearing aid microphone(s), gets amplified in the device and starts to loop around through the system.