Couplers for calibration of earphones (U)
Subtitle: review of existing situation and recommendations for needed research and development work
By: report of Working Group 48,  J.J. Zwislocki, chairman, R.W. Benson ... [et al.]
Contributors: Zwislocki, Jozef J., 1922-; National Research Council (U.S.). Committee on Hearing, Bioacoustics, and Biomechanics.
Publisher: NAS-NRC Committee on Hearing, Bioacoustics, and Biomechanics
Published: 1967
Place of publication: [Washington?]
Language: eng
Subjects: Headphones -- Calibration.; Telecommunication -- Equipment and supplies.
Other titles: Report of Working Group 48
Notes: At head of title: Report of Working Group 48.  Couplers for calibration of earphones.  NAS-NRC Committee on Hearing, Bioacoustics and Biomechanics, 1967.

"September 1967."

"Office of Naval Research contract no. NONR 2300 (05)."

Bibliography: p. 7.