US Patent 9257107 Musical drumhead with tonal modification

A musical drum comprised of a drumshell and a drumhead, which includes a composite of tonal modifiers acting synergistically for dampening drum sounds by eliminating high frequencies and overtones. The tonal modifiers include a first tonal modifier comprised of synthetic material, a second tonal modifier bonded to the synthetic material in overlaying relation, a third tonal modifier positioned upon the second tonal modifier in overlaying relation, and a fourth tonal modifier bonded to the central portion of the third tonal modifier in overlaying relation, the combination of which cooperate to break down the various levels of harmonics to their purest form resulting in a unique sound and vibrational experience provided in a therapeutic context for the well-being of a person.