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Harmonic Analysis of Mallet Percussion By Max Candocia.

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Presentation on theme: "Harmonic Analysis of Mallet Percussion By Max Candocia."— Presentation transcript:

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2 Harmonic Analysis of Mallet Percussion By Max Candocia

3 Goals Basic understanding of sound waves and mallet percussion Understand harmonic analysis Understand difference in sounds of different mallets and striking location

4 Marimba Photo courtesy of vichitex.com Vibraphone Photo courtesy of woodbrass.com Recording: Vermont Counterpoint, Nathaniel Bartlett Recording: La Fille Aux Cheveux de Lin, Ozone Percussion Ensemble

5 Xylophone Photo courtesy of onlinerock.com Recording: Fantasy on Japanese Wood Prints

6 Sine: Sawtooth: Sound Waves Vibrating medium (ie. Air, water, ground) Longitudinal Harmonics – Sinusoidal Components Images courtesy of Wikipedia

7 Qualities of Harmonics Frequency – Cycles per second (Hertz); determines pitch Amplitude – Power of wave; determines loudness Phase – Location of harmonic relative to other harmonics Photo courtesy of Wikipedia Photo courtesy of physics.cornell.edu Photo courtesy of 3phasepower.org

8 Harmonic Analysis Harmonics of Kelon xylophone struck in center with hard rubber mallet

9 Vibraphone Harmonics Dry: Wet: InstrumentMalletLocation# HarmonicsH1 dBH2 dBH3 dBH4 dBH5 dB VibraphoneBlackDry VibraphoneBlackWet VibraphoneRedDry VibraphoneRedWet11 VibraphoneWhiteDry VibraphoneWhiteWet2251.5

10 Xylophone Harmonics InstrumentMalletLocation# HarmonicsH1 FreqH2 FreqH3 FreqH4 FreqH5 Freq XylophoneHard RubberCenter XylophoneHard RubberEdge XylophoneHard RubberNode XylophoneNatural RubberCenter XylophoneNatural RubberEdge XylophoneNatural RubberNode XylophonePlasticCenter XylophonePlasticEdge XylophonePlasticNode

11 On the Node

12 Marimba Harmonics InstrumentMalletLocation# HarmonicsH1 FreqH2 FreqH3 FreqH4 Freq MarimbaBlackCenter MarimbaBlackEdge MarimbaBlackNode MarimbaRedCenter MarimbaRedEdge MarimbaRedNode

13 Using a Stick on Marimba InstrumentMalletLocation# HarmonicsH1 FreqH2 FreqH3 FreqH4 FreqH5 FreqH6 Freq MarimbaStickCenter MarimbaStickEdge MarimbaStickNode

14 Conclusion Sounds made of harmonics Relative phase has no apparent pattern in mallet percussion Vibraphone very simple sound when wet, more complicated when dry Soft mallets on marimba and vibes induce sounds with less harmonics Xylophone has different sounds depending on striking location Harder mallets on marimba produce trends in harmonics similar to xylophone

15 Thanks to: Professor Steve Errede Adam Watts Dan Carson 3M Richard Feynman playing conga; photo courtesy of physics.miami.edu


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