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- catalog contributor b3643673.
- catalog contributor b3643674.
- catalog contributor b3643675.
- catalog created "1944.".
- catalog date "1944".
- catalog date "1944.".
- catalog dateCopyrighted "1944.".
- catalog description "pt I. Estimation and measurement of sound levels in airplanes. Object ; Procedure and apparatus ; Estimation of sound levels and spectra in airplanes ; Measurements of sound levels and spectra in eighteen types of airplanes at normal cruising flight conditions ; Variation of sound levels and spectra as a function of position in the airplane ; Variation of sound levels and spectra as a function of flight conditions ; Variation of sound levels and spectra as a function of different propeller and exhaust conditions ; Variation of sound levels and spectra as a function of wind leaks around doors windows hatches and turrets and of ventilator design ; Variation of sound levels and spectra as a function of altitude ; The effect of noise on communications and psychomotor efficiency -- pt II. Materials for sound control in airplanes. Object ; Introduction ; Sound transmission through imperious structures ; Sound transmission through absorptive structures ; Sound absorption by various structures ; Sound absorption as a function of the properties of trim cloths ; Flow resistance of fibrous materials -- pt III. Practical procedures for sound treating airplanes. Introduction ; Factor of basic design affecting sound levels ; Procedure for design of acoustical treatment for flight deck of a hypothetical bomber ; Additional information pertinent to the sound treatment of airplanes ; Conclusions ; Collected computational charts and tables -- Appendix A : Properties and measurement of sound -- Appendix B : Apparatus for measuring sound transmission, absorption and flow resistance -- Appendix C : Tabulation of transmission characteristics for measured acoustical structures -- Appendix D : Letters of authority (manufacturer's release for data published).".
- catalog extent "vi, 388 p.".
- catalog issued "1944".
- catalog issued "1944.".
- catalog language "eng".
- catalog publisher "[Cambridge]".
- catalog subject "629.1341".
- catalog subject "Airplanes.".
- catalog subject "Soundproofing.".
- catalog subject "TL681.S6 B4".
- catalog tableOfContents "pt I. Estimation and measurement of sound levels in airplanes. Object ; Procedure and apparatus ; Estimation of sound levels and spectra in airplanes ; Measurements of sound levels and spectra in eighteen types of airplanes at normal cruising flight conditions ; Variation of sound levels and spectra as a function of position in the airplane ; Variation of sound levels and spectra as a function of flight conditions ; Variation of sound levels and spectra as a function of different propeller and exhaust conditions ; Variation of sound levels and spectra as a function of wind leaks around doors windows hatches and turrets and of ventilator design ; Variation of sound levels and spectra as a function of altitude ; The effect of noise on communications and psychomotor efficiency -- pt II. Materials for sound control in airplanes. Object ; Introduction ; Sound transmission through imperious structures ; Sound transmission through absorptive structures ; Sound absorption by various structures ; Sound absorption as a function of the properties of trim cloths ; Flow resistance of fibrous materials -- pt III. Practical procedures for sound treating airplanes. Introduction ; Factor of basic design affecting sound levels ; Procedure for design of acoustical treatment for flight deck of a hypothetical bomber ; Additional information pertinent to the sound treatment of airplanes ; Conclusions ; Collected computational charts and tables -- Appendix A : Properties and measurement of sound -- Appendix B : Apparatus for measuring sound transmission, absorption and flow resistance -- Appendix C : Tabulation of transmission characteristics for measured acoustical structures -- Appendix D : Letters of authority (manufacturer's release for data published).".
- catalog title "Principles of sound control in airplanes [by] Leo L. Beranek, director [and others] Research on sound control, Cruft Laboratory, Harvard University, Cambridge, Massachusetts, under the auspices of Office of Scientific Research and Development, National Defense Research Committee.".
- catalog type "text".