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

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Acoustical Factors in the Design of Motion Picture Equipment

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
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
Link: https://doi.org/10.5594/J12630
Author(s): Howard C. Hardy

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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

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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

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<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>

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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>