当声波与声-电转换器的主要测象限垂直时，其声波在主要测象限内产生的声-电电压最强。
When sound wave is perpendicular to the main measure quadrant of sound-electronic transducer, the most strong sound-electronic voltage will be produced.
当声波与声-电转换器的主要测象限垂直时，其声波在主要测象限内产生的声-电电压最强。
When sound wave is perpendicular to the main measure quadrant of sound-electronic transducer, the most strong sound-electronic voltage will be produced.
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