Additional Info

• ID Code: H1-02
• Purpose: Demontrates longitudinal behavior of sound waves
• Description: A lighted candle is placed directly in front of the center of a large loudspeaker, which is operating in the 10 Hertz range. The motion of the candle flame is longitudinal, following the motion of the air, illustrating the longitudinal nature of sound waves.

  With a bit of exploration, one can find resonances in the system that produce the most dramatic flame displacement. Consider having students make predictions about how different waveforms will make the flame respond differently

• Availability: Available
• References: REFERENCES: (PIRA 3B30.40)
• Loc codes: OS5, ME2
• Videos-1: Side view at speaker resonance frequency, then setup rotated from side view to direct view toward speaker then back to side view
• Videos-2: Front view at speaker resonance frequency, video zooms in on flame, and speaker is rotated from front to side view