ðə tɹænsmˈɪʃən kˌoʊɪfˈɪʃənt ɪz dᵻfˈaɪnd ɪn tˈɜːmz ʌvðɪ ˈɪnsɪdənt ænd tɹænsmˈɪɾᵻd pɹˌɑːbəbˈɪlᵻɾi kˈɜːɹənt dˈɛnsᵻɾi dʒˈeɪ ɐkˈoːɹdɪŋ tuː:
The transmission coefficient is defined in terms of the incident and transmitted  probability current density J according to: