Journal of the Society of Motion Picture Engineers ( Volume: 50, Issue: 2, February 1948)

[ACTIVE]

Acoustical Factors in the Design of Motion Picture Equipment

Metadata

Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPE
Volume: 50, No. 2, pp. 139–148
Abstract: No simple solution for the reduction of mechanical noise of motion picture equipment can be expected. Acoustic designing depends on fundamental analysis of the phenomena which cause the undesired disturbance. The psychology of hearing points out the importance of lowering the frequencies. The importance of measuring the spectrum of the noise is emphasized in order to find a clue to the treatment. A distinction is made between sound-energy sources and sound-radiating sources. A discussion of these and the coupling between them is made. Reduction of noise comes about by means of (1) lessening the force from the energy source, (2) reducing coupling, (3) increasing the mechanical impedance, and (4) lowering the radiation impedance. Reducing the coupling appears to have the best potentialities. A brief discussion is also made of measuring techniques.
Publication Date: 1948-02-01
DOI: 10.5594/J12630
ISSN: Print: 0097-5834
Link: https://doi.org/10.5594/J12630
Author(s): Howard C. HardyArmour Research Foundation of the Illinois Institute of Technology, Chicago 16, Illinois
Copyright: © 1948 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

Audience Noise as a Limitation to the Permissible Volume Range of Dialog in Sound Motion Pictures [Active]
(1) Fletcher Munson , “Loudness, its definition, measurement, and calculation,” , J. Acous. Soc. Amer. , vol. 5 , p. 82 ; October, 1933 . EXTERNAL
(2) “The relative annoyance produced by various bands of noise,” Harvard Psycho-Acoustic Laboratory , PB-27306, Office of the Publication Board, Department of Commerce. EXTERNAL
(3) Fletcher Harvey , “Hearing, the determining factor for high-fidelity transmission,” , Proc. I.R.E. , vol. 30 , pp. 266 – 277 ; June, 1942 . EXTERNAL

Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J12630.json

Reference Tree

Explore all references and references to this document, as a navigable tree.

Open Reference Tree

Reference this Doc

Plain text (ISO 690 compliant)

Preview:

Howard C. Hardy; Acoustical Factors in the Design of Motion Picture Equipment, Journal of the Society of Motion Picture Engineers ( Volume: 50, Issue: 2, February 1948); SMPTE, 1948. Available at https://doi.org/10.5594/J12630

Snippet:

Howard C. Hardy; Acoustical Factors in the Design of Motion Picture Equipment, Journal of the Society of Motion Picture Engineers ( Volume: 50, Issue: 2, February 1948); SMPTE, 1948. Available at https://doi.org/10.5594/J12630

HTML (ISO 690 compliant)

Preview:

Snippet:

<span class="citation">Howard C. Hardy; <cite>Acoustical Factors in the Design of Motion Picture Equipment</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 50, Issue: 2, February 1948); SMPTE, 1948. Available at <a href="https://doi.org/10.5594/J12630" target="_blank" rel="noopener">https://doi.org/10.5594/J12630</a></span>

SMPTE's HTML Pub

Preview:

Snippet:

<li>
Howard C. Hardy; <cite id="bib-10-5594-j12630">Acoustical Factors in the Design of Motion Picture Equipment</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 50, Issue: 2, February 1948); SMPTE, 1948
<span class="doi">10.5594/J12630</span>
</li>