| 摘要 |
<p>A drumhead lamination comprising upper and lower layers of synthetic plastic sheet materials and a layer of impregnated polyester or natural fabric sheet material sandwiched in between the synthetic plastic layers. A substance employed to impregnate the fabric, typically a liquid or resin, causes the fabric to harden and stiffen to enable it to vibrate synergistically in concert with the vibrating synthetic plastic layers when the drumhead is struck by a drumstick or a similarly hard object. Laminating adhesive is used to bond the layers together. Epoxy or a similar substance is applied to the top and bottom exposed surfaces of the drumhead as a protective coating.</p> |
