一、鼓皮发声体与共鸣1.声音是经空气振动,由一个音源开始,以声波形式扩散,就像在平静的池塘里丢入一颗卵石造成扩大的圆形涟漪。鼓面的松紧也可以通过增加或减少压力来调音。对于全世界的打击乐手来说,用边框或是旋钮来将他们的鼓调到绝对或相对音高是家常便饭。调整螺丝,如欧洲人的定音鼓或是伊朗的高脚形东贝鼓(Doumbek),就是把鼓面弄紧或是用水把鼓面弄湿(这样鼓皮就会潮湿而变松),或用火烤鼓皮(这样鼓皮会变干、变紧、变低)。但鼓手也有可能超越 1. Drum sound and resonance 1. Sound is air vibration, starting from a sound source, the spread of sound waves, like throwing a pebble in a calm pond caused by the expansion of the circular ripples. The elasticity of the drumhead can also be tuned by increasing or decreasing the pressure. For percussionists around the world, it is not uncommon to use borders or knobs to turn their drums to absolute or relative pitch. Adjustment screws, such as the European timpani or the Iranian high-profile Doumbek, are used to tighten the drumhead or wet the drumhead with water (so that the drumhead becomes wet and loose) or Fire roasted drum skin (so drums will dry, tighten, become low). But the drummer is also likely to surpass