Believe me, that's the first thing I tried, the second was stereo! The didn't seem to have much sound or change much except the background noise.Beethoven's ear trumpets from the pre-electronic era:
The only audio the horn has been used for is talking thru it and playing a cellphone thru it. It again seems to have no particular sound.
I did that with an all hex cell version, basically cutting the walls to make a spherical mouth of the same radius as the length of the horn. I think it's a good option and not too hard to do, though it does cut back the outer wall a good bit. Is that a better way to make it than the soccer shape? I don't know.shorten the walls that form the outer perimeter to get the soccer ball exit.
@Hearinspace I think this is what you are thinking of, all hexagonal and with straight cells. This is a first look. This is made with the mouth in a spherical shape. Normally hexagons (and squares) don't fit like this, they want to be flat or have spaces between the cells. But I managed to get the walls to all touch, no gaps between them.