PHYS 105 1nd Edition Lecture 24Outline of Last Lecture I. Equal temperament Outline of Current Lecture II. Pluck string and bowed strongIII. ViolinIV. Sound quality of string instruments [Important resonance modes]Current LectureI. Pluck string and bowed strong- The string can be bowed or plucked in order to produce sounds- Different timbres will occur due to different harmonic contents o If a string is plucked at the middle, it excites nodes 1,3,5,7o Plucking at certain parts of string, you receive certain frequencies - Acoustic properties of string instruments are determined by the resonance sound box II. Violin- Became one of the most important instruments in western music because of tone qualityo Tone quality is dependent on the vibration of violin bodyo There are six major modes of vibrationIII. Sound quality of string instruments [Important resonance modes]- C1 and C2o 1 and 2 dimensional bending flexure modes, radiate little sound- A0o Air flows in and out of the f-hole - T1 modeo Radiates sound effectively and dominate the low frequency sound spectra- C3 and C4o Two-dimensional modes - Broad resonance at 2-3 kHz is called the Bridge-Hill mode - Patterns correspond to 2-D standing waves o Depending on the frequency These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a
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