Definition
Directivity describes the ability or tendency of something to emit or receive energy or signals in a particular direction more strongly than others. It's often used in the context of antennas, speakers, or even animal behavior. Think of a spotlight shining its beam, a satellite dish focusing on space, or a dog turning its ears toward a sound. High directivity means a focused beam or signal. Low directivity means it's more dispersed. It is an important factor in signal strength and clarity.