Abstract
IN NATURE of April 15 I described a number of experiments with the gramophone. Since then I have continued to work on this interesting subject, and have at last succeeded in transcribing the vibrations of tones or chords as these are produced by the gramophone; that is to say, during the time that the sounds are given forth. The method is illustrated in the figure accompanying this paper (Fig. 1), and-I also give several illustrations of the tracing so obtained. The sounds of the gramophone are carried by a tin tube from the end of 'the arm of the instrument to which the horn or 'trumpet-resonator is attached, to a sensitive microphone. The microphone used was made, by Herr MulleNUri, of Brunswick, and was intended to be used in the experiment of the singing-arc flame and also for a loud-speaking telephone. In the circuit of the microphone I have five or six dry cells giving a current of about five volts. In the same circuit is the recorder, which is a very small electromagnet having a marker attached to the keeper.
Article PDF
Rights and permissions
About this article
Cite this article
MCKENDRICK, J. Further Experiments with the Gramophone. Nature 81, 488–490 (1909). https://doi.org/10.1038/081488a0
Issue Date:
DOI: https://doi.org/10.1038/081488a0