Sound : an elementary text-book for schools and colleges (1913)
Capstick, John Walton, 1858- · leaf 207
ng chapters we have described a few suchmethods of measurement as fell naturally into the line of ourargument. In the present chapter we shall gather together anumber of other methods which have been used by investigators.The aim will be not so much to provide a complete list, as todescribe… … Fig. 93 230] ACOUSTICAL MEASUREMENTS 197 of a note can be found by means of Savarts Toothed Wheelor the Disc Siren. These instruments are capable of givingonly a rough approximation to the frequency. A betterinstrument of the same class, where the number of vibrationsper second is counted directly,…
Sound
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