Correlation of Flame Vibration with Sound Pulses

A series of tealight candles is placed in a row, in front of an exposed speaker cone. This video is meant to illustrate the wave nature, or at least the periodic vibrational nature of sound in air.

Pure tone frequencies of 1 Hz, 5 Hz, 10 Hz, 20 Hz and 40 Hz are played in succession.

The flames show visible vibrational correlation from a vibrational frequency upwards of 5 Hz.

All footage was shot with an iPhone 6S.

• #science_technology
• #sound
• #flame
• #candle
• #tealight
• #vibration
• #frequency