Markus Schneider - FH-Regensburg

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Markus Schneider - FH-Regensburg Acoustics of the Cajon Markus Schneider - FH-Regensburg

Content History Acoustic System of the Cajon – Overview Plate Helmholtz Resonator Other Resonators Equipment

History Origin in Peru The first instruments were shipping boxes “Cajon” is the Spanish word for box Adopted by Cuban flamenco percussionists

Acoustic System - Overview Plate with clamped edges Helmholtz Resonator

Plates – Modes of vibration 1 Theory Simulation Recorded Video Fundamental Mode (0,1) Mode

Plates – Modes of vibration 2 Theory Simulation Recorded Video Fundamental Mode (1,0) Mode

Helmholtz-Resonator Calculation FFT C: Speed of waves in air r: Radius of the hole V: Volume of the body Dominant frequency : 160 Hz

Other Helmholtz Resonators Exhaust system Loudspeaker Body of other musical instruments

Equipment Acoustic Camera  33 microphones “make sound visible” Software  NoiseImage Equipment can be seen at FH-Regensburg  Mechanical Engineering

Thank you for your attention! Markus Schneider - Acoustics of the Cajon

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