Hi. I'm making plans to capture acoustics of some notable natural caves and temples in SE Asia. Because of the situation, I can't be setting off pistols. These are some huge spaces, and I'm dubious that a balloon pop will do it. Likewise, bringing speakers for a sine sweep will be difficult.
I'm wondering if I can't use something like a big clapboard. The issue I see is that the source is not as close to a true impulse as it is for an explosive device. It likely has all frequencies, but not necessarily in balance.
So, my question: Can I use Deconvolver with this kind of source, to get an accurate IR?
Thank you, Aleksey. That is good to know.
Would you have any recommendations for explosive sources between a balloon pop and a gunshot? Small firecrackers, maybe?
If you can hire a high-voltage electrical engineer you could ask them to make an electrical discharge machine (something of Nikola Tesla legacy). I think an in-air electrical discharge is one of the best "test tones" for such tasks - it is omni-directional and you won't need to "deconvolve" it after recording. Well, of course, it's theory - I have my doubts that such machine can be easily created for capturing big spaces. But for smaller rooms you won't need a powerful discharge.
Gunshot and balloon pop are actually not such great sources, because their energy is concentrated in lower frequencies and the frequency response of their sound is non-linear.
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