TY - BOOK AU - Beranek,Leo Leroy TI - Acoustic measurements U1 - 534.4 PY - 1949/// CY - New York PB - John Wiley KW - Sound KW - Electro-acoustics KW - Microphone N1 - "Prepared under the auspices of the Office of Naval Research, Navy Dept., Washington, D.C."; Includes index; Bibliographical footnotes ER -