Physics 1240 Thurs 4/24/06Today: Singing voice, throat singingNext time: Musical illusionsLearning goals• Identify vowel sound knowing the frequency of the first two formants• Know the physics behind throat singingLast timeSteady vowel sounds – produce sensation of distinct pitch –periodic waveform – harmonic seriesFormants – natural frequencies of the vocal tract Frequency of the formants determines the perceived vowel soundVocal tract – pipe closed at one end (very approximate)intensity = source x filterCT28.1 What are the approximate frequencies (in Hz) of the 2ndand 3rdformants for a vocal tract 0.1 m long?A) 2580, 4300B) 1720, 2580 C) 3440, 8600D) 1720, 2867CT28.2 The particular vowel sound of a steady note is determined by the A) the frequency of the formantsB) the frequency of the vocal foldsC) both A) and B)D) none of the aboveCT28.3 What increases the pitch of a singer’s voice?A) increasing the frequency of the formants by changing the vocal tract shapeB) increasing the tension of the vocal foldsC) both A) and B)D) none of the aboveLocation of first two formants determines vowel soundCT28.4 What is the frequency of the first two formants in the “i” sound in word “pit”?A) 2500, 300B) 300, 900C) 500, 2500Throat singing – very narrow formant resonance used to emphasize higher
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