nˈɔɪz pˈɪkt ˌʌp θɹuː ðə hˈɪɹɪŋ ˈeɪdz mˈaɪkɹəfˌoʊn kɹiːˈeɪts ðɪs fˈiːdbæk, wˌɪtʃ ɪz ðˈɛn ˈæmplᵻfˌaɪd kɹiːˈeɪɾɪŋ ɐ ɹˈɪŋɪŋ nˈɔɪz.
Noise picked up through the hearing aid's microphone creates this feedback, which is then amplified creating a ringing noise.