3906158 is referenced by 10 patents and cites 7 patents.

The specification discloses a method and apparatus for conducting audiometric tests, particularly characterized in that the tests are conducted under conditions of closely simulating the actual environment with respect to noise normal to the subject. The environmental conditions are simulated by a noise sound track which is supplied to earphones at selected volumes and the hearing acuity of the subject is determined by supplying identifiable signals, such as words, from another sound track to the earphones.

Title
Method and apparatus for conducting audiometric tests
Application Number
05/253,653
Publication Number
3906158
Application Date
May 15, 1972
Publication Date
September 16, 1975
Inventor
Lake James Douglas
Agent
Crosby Melvin A
IPC
A61b 05/12
A61B 05/12
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