I suppose this isn't exactly a reed, but it seems like a method of producing a sound that I've never seen on any instrument, at least on any commonly known instrument.
This "reed" consists of two rubber membranes tightly stretched across the bore of the instrument. Essentially, they'd act as "lips" being buzzed, if we're to compare them to lip buzzing on brass instruments. However, I like to think of them visually more like human vocal chords rather than lips.
I'm wondering if such a thing is acoustically possible. I that assume it is, but I want to make sure, and I also would like to understand the acoustic consequences of such a reed (whether it's considered open or closed, which harmonics it could play, etc.).
I'm also wondering if such a reed exists on some instrument that I've never heard of. I'd love to see an example of this reed being used to play music.