Acoustics & Sound For Musicians - Online Book

The Theory Of Sound Which Constitutes The Physical Basis Of The Art Of Music.

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	40              LAW OF PENDULUM-VIBRATION. [I. § 20. The form of the associated wave for longitudinal pendulum-vibrations is shown in Fig. 17 bis. Fig. 17 bis.
	Retaining the form of the curve, we may make its amplitude and wave-length as large or as small as we please, as in the case of the waves in Fig. 4, (l)and(2), p. 13. 20. We have examined the transmission of waves due to longitudinal vibrations along a single very slender filament. Suppose that a great number of such filaments are placed side by side in contact with each other, so as to form a uniform material column. If, now, precisely equal waves are simul­taneously transmitted along all the constituent filaments, successive pulses of condensation and rare­faction will pass along the column. The parts in any assigned transverse section of the column will. obviously, at any given moment of time, all have exactly the same degree of compression or dilatation.