Wonders of Acoustics Or the Phenomena of Sound
Wonders of Acoustics Or the Phenomena of Sound
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Unfortunately, however, the notes of a chord do not vary in true proportion to the weight at- PITCH OP SOUNDS. 147 tached ; to obtain the octave, for instance, we must not only double but quadruple the amount of tension. With the four weights of the hammers Pythagoras would never have been able to get these intervals from his string. Again, it would be very difficult to find hammers giving notes pro- portioned to their weight; the circumstance is merely a coincidence. Finally, it must be allowe...d that in a forge we do not hear the blow of the hammer on the bar so much as that of the bar on the anvil.
Modern scientific men have applied another principle to the measurement of the number of vibrations. It consists in producing sounds by a succession of periodical impulses given by a wheel, whose turns are registered by a mechani- cal contrivance. This idea was first put in practice by Stancari. He took a wheel three feet in diameter, and fixed on its outer circle 200 iron points. Thus prepared, the wheel was set on a horizontal axle, and turned with great rapidity.
What to read after Wonders of Acoustics Or the Phenomena of Sound?
You can find similar books in the "Read Also" column, or choose other free books by Rodolphe Ie Jean Charles Rodolphe Radau to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Unfortunately, however, the notes of a chord do not vary in true proportion to the weight at- PITCH OP SOUNDS. 147 tached ; to obtain the octave, for instance, we must not only double but quadruple the amount of tension. With the four weights of the hammers Pythagoras would never have been able to get these intervals from his string. Again, it would be very difficult to find hammers giving notes pro- portioned to their weight; the circumstance is merely a coincidence. Finally, it must be allowe...d that in a forge we do not hear the blow of the hammer on the bar so much as that of the bar on the anvil.
Modern scientific men have applied another principle to the measurement of the number of vibrations. It consists in producing sounds by a succession of periodical impulses given by a wheel, whose turns are registered by a mechani- cal contrivance. This idea was first put in practice by Stancari. He took a wheel three feet in diameter, and fixed on its outer circle 200 iron points. Thus prepared, the wheel was set on a horizontal axle, and turned with great rapidity.
What to read after Wonders of Acoustics Or the Phenomena of Sound?
You can find similar books in the "Read Also" column, or choose other free books by Rodolphe Ie Jean Charles Rodolphe Radau to read onlineMoreLess
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