The person who is listening may use an FM/IR/IL Receiver to tune into the signal and listen at his/her preferred volume.
ðə pˈɜːsən hˌuː ɪz lˈɪsənɪŋ mˈeɪ jˈuːz ɐn ˌɛfˈɛm slˈæʃ ˌaɪˈɑːɹ slˈæʃ ˌaɪˈɛl ɹᵻsˈiːvɚ tə tˈuːn ˌɪntʊ ðə sˈɪɡnəl ænd lˈɪsən æt hˈɪzɔːɹhˈɜː pɹɪfˈɜːd vˈɑːljuːm.