超聲波的縱波發射聲場
1.圓盤波(bo)(bo)源(yuan)(yuan)(yuan)縱波(bo)(bo)聲場 在不考慮介(jie)(jie)質(zhi)中(zhong)(zhong)衰減的(de)情況下(xia)，圓盤波(bo)(bo)源(yuan)(yuan)(yuan)在理(li)想液體介(jie)(jie)質(zhi)中(zhong)(zhong)振(zhen)動輻射(she)聲波(bo)(bo)，其中(zhong)(zhong)某一(yi)點(dian)波(bo)(bo)源(yuan)(yuan)(yuan)d,在波(bo)(bo)源(yuan)(yuan)(yuan)軸線上Q點(dian)所引(yin)起(qi)的(de)聲壓(ya)(ya)為(wei)（圖(tu)2.13)基于波(bo)(bo)的(de)疊加原理(li)，整個圓盤波(bo)(bo)源(yuan)(yuan)(yuan)上各點(dian)在Q點(dian)引(yin)起(qi)的(de)聲壓(ya)(ya)疊加，就是(shi)Q點(dian)處的(de)聲壓(ya)(ya)，由此(ci)可得到軸線上任一(yi)點(dian)的(de)聲壓(ya)(ya)幅值為(wei)波(bo)(bo)源(yuan)(yuan)(yuan)軸線...
