By Paul. E Sabine
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Extra resources for Acoustics And Architecture
TABLE II in Figs. 5a SUSTAINED SOUND IN AN IN CLOSURE 37 It should be said that the form of the expressions for the various quantities considered depends upon the convention adopted as to sign and phase of the motion at the origin. The convention here used is such' that in the condensation phase the particle motion coincides with the direction of propagation. Vibrations of Air Columns. Referring again to Fig. 6, we note that the particles at PO and at P 2 o under the action of the direct and reflected waves are at all times stationary.
Of the physical quantities involved in the sound suggests the phenomena of that are to be encountered in the direct experimental determination of these quantities and why precise direct acoustical measurements are so As a matter of fact, it has been only difficult to make. since the development of the vacuum tube as a means of difficulties amplifying very minute electrical currents that quantitative of the problems of sound has been possible. work on many Complex Sounds. In the preceding sections we have dealt with the case of sound generated by a body vibrating with simple harmonic motion.
1 Jour. , pp. 245-262, August, 1927. NATURE AND PROPERTIES OF SOUND 31 Speech sounds are a mixture of musical sounds and In the vowels, the musical characteristics predominate, although both pitch and quality vary rapidly. The consonant sounds are noises that begin and terminate the sounds of the vowels. In singing and intoning, the pitch of each vowel is sustained for a considerable length of time, and only the definite pitches of the musical scale noises. are produced that is, in good singing.
Acoustics And Architecture by Paul. E Sabine
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