References

American Speech and Hearing Association. 1969. Noise as a public health hazard; Conference proceedings. Report no. 4. Washington, D.C.

Sperry, W.C., J.O. Powers, and S.K. Oleson. 1968. Status of the aircraft noise abatement program. Sound and Vibration (August): 8-21.

U.S. Environmental Protection Agency. 1974. Information on levels of environmental noise requisite to protect health and welfare with an adequate margin of safety. EPA 550/9-74/004. Washington, D.C.

---. 1978. Protective noise levels. EPA 550/9-79/100. Washington,

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