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A new drum? What would be new to a drum? Drums already exist since we were walking on foot in the woods. Meanwhile there are dozens of variations. And there is nothing more to improve, isn't it? And what is a paraboloid?
Such or similar you may have asked youself. But there are differences. And these differences I am trying to explain, so that it is understandable to everyone, without mathematical formulas, although it is a so called mathematical drum:
The better sound is produced by the consistent implementation of acoustic, physical laws. The ratio and the path of the sound waves between the different sound chambers have become predictable. Where the sound chamber is the part of a drum, which is surrounded by the drum skin. For in our drum, it is a so-called paraboloid. These are mathematical parabolas, rotated about one axis, giving a three-dimensional, spatial object. That sounds a bit technical, but is not that bad. And since music, physics and acoustics actually is the same, expressed only in different languages, we are back again to the paraboloidal drum.
These paraboloids have a focal point. Everyone knows that from the satellite dish, also called parabolic antenna, where the actual receiver unit (antenna) is located at the focus. A satellite dish is a very flat design of a paraboloid. In this focal point in our case, the sound waves are bundled and are passed from there to the other paraboloids.
The sound waves are generated in a drum by the drum head, by hitting it in some way or other. Sometimes with sticks or mallets, like a marching drum. Or with your bare hands, like with an African djembe. As a result, this drum head is made to vibrate and produces a sound. In a normal, conventional drum, the amount of different tones is very limited. With a paraboloidal drum, you may already expect it, it is somewhat different. Here it is possible to produce different sounds that vary in tone, depending on where it is hit on the head. And this you can have at the same time with multiple sounds, as in a chord, with a certain way of playing.