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Some time ago on the old forum, I enquired about splitting a candle flame with an electric field. Some more information may help solving this... and details on how to turn a flame into a speaker:
23o. Deflection of ions. The flame of a Bunsen burner which is fed with KNO3 solution by a wick, is placed between the plates of a large capacitor which is connected to the Wimshurst Electrostatic Generator. With the generator running it will be found that the flame splits into two halves, the positive ions being attracted to the negative plates and vice versa.
23p. Ionic speaker. Into the flame of a butane torch are placed two fine tungsten wires attached to the secondary of the transformer which steps the output of the audio amplifier up to approximately 1,000 volts. Ions are produced in the flame from a saturated KNO3 solution fed into its place from a wick. When music or any other audio input is played through the amplifier a distorted version of the input is heard from the flame. This is due to the motion of the ions in the electric field between the wires. If a photo cell is set up close to the flame, and the output amplified, it will be found that the light from the flame is also modulated. The quality of the sound may be improved by using a high voltage (500-1000v) DC supply to bias the flame.
Registered Member #964
Joined: Wed Aug 22 2007, 12:39AM
Location: Stockton, CA
Posts: 134
You could do this with a normal candle, and a Negative HV DC supply. The positive ions in the flame are attracted to the needle on the output, and the other half of the flame is effected by the "electric wind" produced by corona on the needle.
So one half is "sucked" to the output needle, and the other half is blown away.
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Electrically spitting a candle flame
