. The Ontario high school physics. ounded edge, against whichthe tense lips of the player are steadily pressed. The lips thusconstitute a reed and by their vibrations waves are set up inthe air within the tube. In this way the fundamental and the various harmonics of the air column in the tube areproduced, and all but the ex-treme bass sounds are used inthe scale. In the French horn the totallength of tube is about 17 feet,and hence the fundamentalnote is very deep. The pro-duction of the harmonic series depends entirely on the variedtension of the lips. The bugle is illustrated in Fig. 248. T
. The Ontario high school physics. ounded edge, against whichthe tense lips of the player are steadily pressed. The lips thusconstitute a reed and by their vibrations waves are set up inthe air within the tube. In this way the fundamental and the various harmonics of the air column in the tube areproduced, and all but the ex-treme bass sounds are used inthe scale. In the French horn the totallength of tube is about 17 feet,and hence the fundamentalnote is very deep. The pro-duction of the harmonic series depends entirely on the variedtension of the lips. The bugle is illustrated in Fig. 248. The length of tube isfixed, and the notes producible are the fundamental and about5 overtones. Itscompass is muchsmaller than thatof the French the cornet,by means ofthree valves a, h, c(Fig. 249), the aircolumn may bedivided into differ-ent lengths, and aseries of overtones is obtained with each length. In the trombone, on the other hand, besides obtaining over-tones by suitable blowing, the pitch is varied by altering the. Fio. 249.—By the valves a, b, c, the air column is divided intodifferent lengths. THE PHONOGRAPH 213 length of the tube. This is done by means of a U-shapedportion, AB (Fig. 250), which can slide with gentle friction
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishe, booksubjectphysics
