Abstract: A drumhead comprising a circular membrane having a flat central play region, a collar extending outwardly and downwardly from the play region, and an outer edge region extending from the collar. A hoop defines a circular channel in which the outer edge region of the membrane is retained. The collar has a convexly curved region having upper and lower ends spanning an included angle, with the upper end transitioning tangentially into the play region and a frustoconical skirt region flaring outwardly from the lower end of the curved region and transitioning into the outer edge area. The included angle of the convexly curved region is about 90 deg., and the skirt and outer edge region of the membrane frustoconically extend from the lower end of the curved region to the channel of the hoop, at a substantially uniform angle in the range of about 10 to 30 deg.

Abstract: A drumhead comprising a circular membrane having a flat central play region, a collar extending outwardly and downwardly from the play region, and an outer edge region extending from the collar. A hoop defines a circular channel in which the outer edge region of the membrane is retained. The collar has a convexly curved region having upper and lower ends spanning an included angle, with the upper end transitioning tangentially into the play region and a frustoconical skirt region flaring outwardly from the lower end of the curved region and transitioning into the outer edge area. The included angle of the convexly curved region is about 90 deg., and the skirt and outer edge region of the membrane frustoconically extend from the lower end of the curved region to the channel of the hoop, at a substantially uniform angle in the range of about 10 to 30 deg.

Abstract: A musical instrument of substantially conical shape that has a rim and spokes, the rim being substantially circular. The spokes number at least three and are of equal length, emanating from a second rim. The second rim is not in the same plane that is defined by the rim but shares the same axis with the first rim. The instrument can be played by striking it with a stick or another instrument. The sound the instrument gives can be changed by varying the diameter of the rim or the number of spokes, the orientation of the instrument, the material of which the instrument is made, or by loosely attaching a cymbal to the interior of the cone defined by the instrument's configuration.