ɪn tˌɛlᵻkəmjˌuːnɪkˈeɪʃən, ðə tɹænsmˈɪʃən kˌoʊɪfˈɪʃənt ɪz ðə ɹˈeɪʃɪˌoʊ ʌvðɪ ˈæmplɪtˌuːd ʌvðə kˈɑːmplɛks tɹænsmˈɪɾᵻd wˈeɪv tə ðæt ʌvðɪ ˈɪnsɪdənt wˈeɪv æɾə dɪskɑːntɪnjˈuːᵻɾi ɪnðə tɹænsmˈɪʃən lˈaɪn.
In telecommunication, the transmission coefficient is the ratio of the amplitude of the complex transmitted wave to that of the incident wave at a discontinuity in the transmission line.