"1914-09-15Z"^^ . . . . "Beranek, Leo"@en . "Leo Leroy Beranek"@en . . "American acoustical engineer" . . "Leo Leroy Beranek (born September 15, 1914) is an American acoustics expert, former MIT professor, and a founder and former president of Bolt, Beranek and Newman (now BBN Technologies). He authored Acoustics, considered the classic textbook in this field, and its updated and extended version published in 2012 under the title Acoustics: Sound Fields and Transducers."@en . "Leo Beranek"@en . . . . "1914Z"^^ . . . . .