CRC Handbook presentation of typical noise levels and recommended noise thresholds is based on:

A Physicist's Desk Reference  (H.L. Anderson, Ed.), American Institute of Physics, New York, 1989.

American Institute of Physics Handbook (D.E. Gray, Ed.), 3rd ed., McGraw Hill, New York, 1972.

Threshold Limit Values for Chemical Substances and Physical Agents; Biological Exposure Indices, 1999 Ed., American Conference of Governmental Industrial Hygienists, Cincinnati, OH.

  UPDATED : 2005-02-06