HANDBOOK OF ACOUSTICS - online book

A complete view of Acoustical Science & its bearings on music, for musicians & music students.

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QUESTIONS.
259
199.  What is the use of the Tonometer? Describe the method of using it.
200.  "Why is the Reed Tonometer inferior in accuracy to the tuning-fork Tonometer ?
CHAPTER XIV.
201.  What use is made of slow beats in music ?
202.  What is the physical cause of dissonance? How would you experi­mentally prove your answer to be correct ?
203.  What is meant by the Beating Distance f State generally how it varies in different parts of the scale.
204.  How can the phenomenon of beats be imitated by the use of one sound only ?
205.  Why are beats unpleasant to the ear ?
206.  Explain a method of detecting very faint musical sounds by means of beats.
207.  Why do beats cease to be unpleasant when they are sufficiently rapid ?
208.  Upon what does the harshness of a dissonance depend. ? Illustrate by examples.
209.   Show by examples that the harshness of a dissonance does not depend entirely on the rapidity of beats.
210.  What are the Beating Distances, in the regions of C2, C„ C, O, and C»?
211.  " The sensation of a musical tone in the region of C2 = 64 persists for Jv of a second after the vibrations that give rise to it have ceased." What evidence is there for this statement ?
212.  What is the cause of Dissonance between Simple Tones that are beyond Beating Distance ?
213.  Two forks, the vibrational numbers of which are 100 and 210. dissonate when sounded together. Explain why. How many beats per second may be counted ?
214.  Two forks, the vibration numbers of which are 200 and 296, generate slow beats when sounded together. Explain the cause of this. How many beats per second will be heard ?
215.  Show that a compound tone may contain dissonant elements in itself.
216.  Show clearly, how it is that j ^ is a harsher discord than j & and
ii than lw
217.  The interval j * sounds less harsh when played by two clarionets, than when played on a harmonium. Explain the reason.
218.  Show by sketches the beating elements present in a Major and Minor Third when played on a piano.