Abstract
A COMMUNICATION1 has drawn attention to the possibility of using flames as sound recorders and amplifiers. A technique was described (Fig. 1 of ref. 1) in which sound waves were produced by modulating the flow rate of oxygen to a small diffusion flame. The region of sound generation, it was stated, is associated with that of maximum flame luminosity, and this luminosity contains the imposed modulation. The authors suggested that the modulating signal could be reproduced acoustically simply by amplifying the photometric recording of direct flame luminosity.
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References
Babcock, W. R., Baker, K. L., and Cattaneo, A. G., Nature, 216, 676 (1967).
Thomas, A., and Williams, G. T., Proc. Roy. Soc., A, 294, 449 (1966).
Hurle, I. R., Price, R. B., Sugden, T. M., and Thomas, A., Proc. Roy. Soc., A, 303, 409 (1968).
Price, R. B., Hurle, I. R., and Sugden, T. M., Twelfth (Intern.) Symp. Combustion, The Combustion Institute (in the press).
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HURLE, I., PRICE, R. & PYE, D. Photometric Recording of Sound from Flames. Nature 219, 849–850 (1968). https://doi.org/10.1038/219849a0
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DOI: https://doi.org/10.1038/219849a0
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