Today's noise sources consist of so vast an array of offenders that we make no attempt to enumerate them in any kind of comprehensive manner. The dominant sources in terms of disturbances to many people are: trucks, automobiles, airplanes, trains, industrial manufacturers, construction and air handling. Industrial plant noise levels rise to values known to be destructive to the hearing mechanism. Accurate determination of the sensitivity of ears to noise has taken several decades to establish. Studies had to be indirect and of a statistical nature because the simple direct experiment of testing to destruction is obviously not acceptable in this instance. The difficulties were further compounded by the very wide range of individual hearing susceptibility to noise. This means that conclusions had to be based on enormous quantities of data. Ultimately hundreds of thousands of case histories were studied, and it became possible to define with reasonable precision what percentage of people would lose hearing acuity after exposure to any given noise level for specific durations.

  • Supplemental Notes:
    • Proceedings of Purdue Noise Control Conference, Purdue University, 14 July 1971.
  • Corporate Authors:

    Purdue University

    School of Aeronautics and Astronautics
    West Lafayette, IN  United States  47907
  • Authors:
    • Karplus, H B
  • Publication Date: 1971-7-14

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 4 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00261041
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 22 1974 12:00AM