dˈeɪvɪd fˈɔːɹbz mˈɑːɹtɪn ˌɛfˌeɪˈeɪ ˌɛfˌɑːɹɹˈɛs twˈɛnti sˈɛvən dʒˈuːn nˈaɪntiːnhˈʌndɹɪd sˈɪks fˈaɪv mˈɑːɹtʃ nˈaɪntiːnhˈʌndɹɪd sˈɛvənti wʌzɐ skˈɑːɾɪʃbˈɔːɹn ɔːstɹˈeɪliən fˈɪzɪsˌɪst ænd ɹˌeɪdɪˈɑːɡɹəfɚ.
David Forbes Martyn FAA FRS (27 June 1906 – 5 March 1970) was a Scottish-born Australian physicist and radiographer.