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Wow, a real flame...

This is not only a horse of yet a different color, but one I've never heard of. Or heard. Thanks for the article! I guess there must be a huge number of things that can be be modulated to make sound if one sets one's mind to it.

I'm thinking of your noisy arc comment. My experiences are limited but I think the most typical reason is that they are usually intermittent. Rather than a continuous arc, they are individual ones with negative resistance dropping the source voltage below the ionization level then stopping until it's exceed again. I've made arc lamps using projector carbons and they weren't very noisy, just a moderate frying sound. I was running them from AC and so don't know how they would have sounded with DC.

Somehow I think I'm going to stick with film or dome tweeters, and not Be ones at that. I don't like the idea of things that can easily burn the house down or contain toxic substances if it's avoidable. Even if they don't escape in normal usage they create a permanent waste-stream problem. But the concept of a wood-burning speaker is definitely fun. Excuse me, I've gotta go stoke the sound.

Rick

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