    REFERENCES:

    Neider, P.C. and W.D. Neff. Science 133: 1010, 1961.

    Frey, A.H.  Aero Space Med. 32: 1140, 1961.

    Zwislocki, J. Noise Control 4:42, 1958.

    Von Gierke, H. Noise Control 2:37, 1956.

    Nifset, R., Pinneo R. Baus J. Fleming, & R. McAfee.  Ann. Rept. USAF
    Rome Air Development Command, TR-61-65, 1961.

    Burr, H., & J.  Seipel, J. Wash Acad. Sci. 21: 455, 1949.

    Morrow, R., & J.  Seipel. J. Wash. Acad. Sci. 30: 1, 1969.

    Jones, R.C., S.S.  Stevens, & M.H. Laurie. J. Acoust. Sci. Am. 12:
    281, 1940.

    Up to Contents

                                    -42-