Is it possible that an acoustic sensor which size is only 10 cm can form a narrow directivity with a constantbeam of 20 degree?
英
美
尺度仅为10cm的声传感器能在数赫兹到数千赫兹的低频宽带范围内形成束宽为20余度的恒定束宽窄指向性吗?
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