noun
directionality; directivity
Technical term used in physics, engineering, and acoustics to describe the property of being directional, such as antenna directivity or microphone directionality. Often contrasted with omnidirectionality.
See also: 志向性
このアンテナは指向性が高い。
This antenna has high directivity.
指向性マイクを使うと、特定の方向の音だけを拾える。
Using a directional microphone, you can pick up sound only from a specific direction.
Compound of 指向 (direction, orientation) and 性 (-ness, property). The exact historical derivation is uncertain, but the term is a modern technical coinage.