A System of Mechanical Philosophy, Bindi 4J. Murray, 1822 - 50 síður |
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Síða 403
... pulses or undulations of air which excite in us the sensation of sound . He demonstrated that if two strings , of the same matter and thickness , be stretched by equal weights , and be twanged or pinched so as to vibrate , the times of ...
... pulses or undulations of air which excite in us the sensation of sound . He demonstrated that if two strings , of the same matter and thickness , be stretched by equal weights , and be twanged or pinched so as to vibrate , the times of ...
Síða 406
... pulse of the other . Suppose two organ pipes , sounding the note C sol fa ut , at the dis- tance of ten feet from each other , and that their pulses be- gin and end at the same instant , making the most perfect coincidence of pulses ...
... pulse of the other . Suppose two organ pipes , sounding the note C sol fa ut , at the dis- tance of ten feet from each other , and that their pulses be- gin and end at the same instant , making the most perfect coincidence of pulses ...
Síða 407
... pulse of one pipe will bisect the pulse from the other : but the law of succession of the deviations from coincidence will then ob- A musical sound is the tain in the most perfect manner . sensation of a certain form of the aerial ...
... pulse of one pipe will bisect the pulse from the other : but the law of succession of the deviations from coincidence will then ob- A musical sound is the tain in the most perfect manner . sensation of a certain form of the aerial ...
Síða 408
... pulse of the other . In the instants of coincidence , the agitation produced by one pulse is increased by that pro- duced by the other . The commencement of the next two pulses is separated a little , and that of the next is separated ...
... pulse of the other . In the instants of coincidence , the agitation produced by one pulse is increased by that pro- duced by the other . The commencement of the next two pulses is separated a little , and that of the next is separated ...
Síða 409
... pulses , and fainter when they bisect each other . This reinforcement of sound will there- fore recur thrice in every second . The frequency of the pulses are in the ratio of a comma , or 81 : 80. Therefore this constitutes an unison ...
... pulses , and fainter when they bisect each other . This reinforcement of sound will there- fore recur thrice in every second . The frequency of the pulses are in the ratio of a comma , or 81 : 80. Therefore this constitutes an unison ...
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action angle appear arch axis balance ball beats body canal centre coating concord conductor constipated cord curve cylinder Daniel Bernoulli degree density diameter diminished dipping needle direction distance effect elec electric fluid electrified electrometer electrophorus equal experiments explain farther force give glass globe greater harmony harpsichord headsails impulse inches increase length limma loadstone magnet major third manner mean tones motion moveable musical natural natural density nearly needle north pole observed octave overcharged pallet particle pendulum perfect perpendicular phenomena piece of iron pipe plate polarity position precisely produced proportion pulses quantity ratio reader redundant fluid redundant matter repel round sails scapement sensible shew ship side sound south pole stratum string suppose surface temperament tetrachords theory tion tooth touch tricity trumpet tune undercharged undulations velocity vibrations wheel whole wind wire