Comparison of speech intelligibility in cockpit noise using SPH-4 flight helmet with and without active noise reduction
By: Jeffrey W. Chan and Carol A. Simpson.
Contributors: Simpson, Carol A.; Ames Research Center.
Series: NASA contractor report -- 177564.; USAAVSCOM technical report -- 90-G-1.; NASA contractor report -- NASA CR-177564.; AVSCOM technical report -- 90-G-1.
Publisher: DEV AIR Technical Associates; National Aeronautics and Space Administration, Ames Research Center; For sale by the National Technical Information Service
Published: 1990
Place of publication: Menlo Park, Calif; Moffett Field, Calif; [Springfield, Va
Language: eng
Format: Microform
Subjects: Airplanes -- Cockpits -- Noise.; Speech, Intelligibility of.
Notes: Distributed to depository libraries in microfiche.

Microfiche. [Washington, D.C. : National Aeronautics and Space Administration, 1990] 1 microfiche.