cardioid
['kɑ:dɪˌɔɪd]
n.
心脏线;
（灵敏度模式呈心形的）定向麦克风;
adj.
心脏线形的;
（麦克风）灵敏度模式呈心脏形的;
例句:
-
Construct rotating cardioid and astroid while remaining orthogonal to each other.
作旋转的心脏线和旋转的星状线,且彼此维持正交.
-
Construct rotating cardioid and deltoid while remaining orthogonal to each other.
作旋转的心脏线和旋转的三角线,且彼此维持正交.
-
Construct rotating cardioid and nephroid while remaining orthogonal to each other.
作旋转的心脏线和旋转的肾脏线,且彼此维持正交.