. The elements of physiological physics: an outline of the elementary facts, principles, and methods of physics; and their applications in physiology. Biophysics. chap, .} QUALITY OF MUSICAL SOUNDS. 435 phrase klang farbe, meaning sound tint, or sound colour, while the French term is timbre, meaning stamp. On what, then, does quality depend ] Consider waves; they differ in size, in rapidity or frequence, but they also differ in form. Size is equivalent to amplitude of vibration, loudness of sound, and rapidity to the number of vibrations per second, pitch of sound, while the form of
. The elements of physiological physics: an outline of the elementary facts, principles, and methods of physics; and their applications in physiology. Biophysics. chap, .} QUALITY OF MUSICAL SOUNDS. 435 phrase klang farbe, meaning sound tint, or sound colour, while the French term is timbre, meaning stamp. On what, then, does quality depend ] Consider waves; they differ in size, in rapidity or frequence, but they also differ in form. Size is equivalent to amplitude of vibration, loudness of sound, and rapidity to the number of vibrations per second, pitch of sound, while the form of the wave is found to correspond to the quality of sound. Waves may be simple or compound ; if simple, their form will be exhibited by rounded crest and hollow, the crest being as much above the middle line as the hollow is below. Apart from such simple forms, waves may be of many shapes, high and sharp, flat and broad, and so on. Now it has been shown that every compound wave is capable of being resolved into simple waves. Fig. 187 shows three waves, whose vibrations are as 1 : 2 : 3. The. blending of these three simple waves produces the compound form marked 4. The form of the complex wave is obtained by drawing a series of vertical Fig. 187.—Compound lines. The position of the com- ^aves. pound wave at any one of these lines is marked by taking the algebraic sum of the distances of the three simple waves above or below the line of rest, and in that vertical line. Thus, take the ver- tical line a'b', the position of a point of the com- pound wave in this line is obtained by taking the distance in the same line between a' and a2, the distance between a3 and a4, and between a5 and a6, and taking their algebraical sum. They are all above the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original M'Gregor-Robertson
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