Acoustics & Sound For Musicians - Online Book

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

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	V. § 65.] CONSTRUCTION OF FLUE-PIPES.	129
	(1)     by blowing against a sharp edge, « (2)    by blowing against an elastic tongue. Those of the first class are called flue-pipes ; those of the second class reed-pipes. We will consider each class by itself. 65. Flue-pipes. Here the wind is driven through a narrow slit against a sharp edge placed exactly opposite to it, in the manner shown in Fig. 41, which represents a vertical section of a portion of the pipe near the end at which its sound originates.
	The air is forced by the bellows through the tube ab into the chamber c, and escapes through the slit d, thus impinging against the edge e, and exciting in the air-column above segmental vibrations whose, period is controlled by the length of the pipe. t.                                                                 9