Yesterday Mr. Clarke and I were determined to discover the making of the Native american flutes out of wood. We used multiple techniques from drilling to laser cutting. We continued the work today trying different shapes for the sound hole edge to see which option works best.
Creating an angle between 30 and 45 degrees from the inside towards the outside made it easier to get the air stream to blow across the sound hole edge. Trying to mimic the recorder with the angle going from the outside in requires the air stream to come along the upper inner edge of the pipe which requires more work especially since the wooden tubes we created did not have a clean symmetrical shape for the hollowed out region. Widening the internal channel did seem to improve the tone some, but more work is necessary to determine how much effect it had.