声音的波形WL2 – 2-1.4
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Earned Point(s): 0 of 0, (0) WL2 – 1.2.2.001 下图是敲击音叉时示波器在相同时间内截取的两列声波图,下列说法正确的是 WL2 – 1.2.2.002 下图是几种声音输入到示波器上时显示的波形,其中音调相同的是 和 ;响度相同的是 和 。(均填序号,1.“甲”、2.“乙”或3.“丙”) WL2 – 1.2.2.003 两列声波在同一示波器上显示的波形如图甲、乙所示,则这两列声波 WL2 – 1.2.2.004 如图是音叉和长笛发出的两列声波在同一示波器上显示的波形,则这两列声波 WL2 – 1.2.2.005 如图所示声波的波形图,下列说法正确的是 WL2 – 1.2.2.006 海豚的质量比蓝鲸小得多,海洋动物学家研究表明:海洋动物质量越小,其叫声越是轻而尖锐,如图甲、乙两曲线为科考船声呐系统收录海豚和蓝鲸叫声的波形图,其中 (选填,1.“甲”或2.“乙”)波形图表示的音调较高,甲图是 (选填,1.“海豚”或2.“蓝鲸”)发出的声音波形图。 WL2 – 1.2.2.007 如图所示是两个声音在同一示波器上显示出来的波形,从图形可知甲的 大,乙的 高。(均选填,1.“音调”、2.“响度”或3.“音色”) WL2 – 1.2.2.008 如图所示是两个声音在同一示波器上显示出来的波形。从图形可知, 图响度大, 图音调高。(均选填,1.“甲”或2.“乙”)
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