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Sound Reception

Published online by Cambridge University Press:  14 September 2016

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Extract

The growing importance of the study of Sound has been shown in many ways during the last few years and most particularly in its applications to military intelligence. Since the classical experiments of Tyndall in 1872 and following years, there is no very definite record of open–air experiments until L. V. King in 1919 performed some experiments for the Canadian Government on fog horns.

A new era of investigation has now been opened up by the realisation of the importance of observation by sound during the late war. The distant gun was located very effectively on most of the Army fronts, and towards the latter end of .the war the aeroplane, invisible at night, was being located by sound also.

The urgency of the problem to be solved resulted in the development of new and effective apparatus which is now available for peace applications as they arise. New microphones and new electrical accessories, particularly the new thermionic valve, have given acoustical research a new interest and have led to the hope of our being able to produce standards, thus bringing sound into line with the other branches of physics.

Type
Proceedings
Information
The Aeronautical Journal , Volume 28 , Issue 164 , August 1924 , pp. 504 - 525
Copyright
Copyright © Royal Aeronautical Society 1924

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References

1 Tyndall. Sound Lecture VII.

2 L. V. King. On the Projection of Sound on the Free Atmospheric and the Acoustic Efficiency of Fog Signal Machinery, etc. Phil. Trans., Series A 218, pp. 211-293, 1919.

3 An Inquiry into the Analytical Mechanism of the Internal Ear. Wrightson.

4 Zünd–Burguet. Conduction sonore et Audition. Tome I.

5 Marage. Rô1e de la chaine des osselets dans l'audition. Bulletin acad. med. Paris, 1900. Müller. Berichte d. Sachs Gesellsch. der Wissensch. 1861. Secchl. La fenestra rotunda e la sola via dei suon dall aria al labyrinthe. Torino.

6 Zünd–Burguet, ibid.

7 Zünd–Burguet, ibid., p. 200.

8 Ibid., p. 182.

9 Fletcher. Journal of the Franklin Institute, Vol. 196, Sept., 1923, p. 289.Google Scholar

10 Zünd–Burguet, ibid., p. 201.

11 Knudsen. Phys. Review, Jan., 1923, p. 84.

12 Fletcher. Journal of the Franklin Institute, Vol. 196, Sept., 1923, p. 289.Google Scholar

13 Phil. Mag., Vol. II., p. 500, 1876.

14 Fletcher, ibid.

15 Rayleigh. Phil. Mag. 13, 1907, pp. 214-216.

Stewart. Phys. Review, June, 1917, p. 502.

16 Stewart. Phys. Review, Aug., 1919, p. 167.

17 Waetzmann. Zeitschrift fur Technische Physike, No. 7, 1921.

18 Waetzmann. Zeitschrift fur Technische Physike, Xo. 7, 1921.

19 Lübcke. Zeitsch. fur Technische Physike (2), 1921.

20 Journal of the Royal Society of Arts, Jan. 5th, 1923.

21 Theory of Sound (Vol. II.), p. 129.

22 E. A. Milne, Sound Waves in the Atmosphere. Phil. Mag., July, 1921,