directioneel

Directioneel is a Dutch term meaning directional. It describes anything that has a preferential direction of performance, sensitivity, or emission, as opposed to omnidirectional or isotropic behavior where response is the same in all directions. The concept is used across several technical fields to indicate orientation-dependent properties.

In audio, directioneel equipment includes microphones and loudspeakers whose response varies with the direction of the sound source or listener. Directional microphones, for example, are designed with pickup patterns such as cardioid, supercardioid, or figure-eight, capturing sound primarily from the front and reducing noise or reverberation from the sides and rear.

In radio and communications engineering, directioneel antennas radiate or receive more strongly in a specific direction. This concentrates gain toward a target area while limiting radiation or reception from unwanted directions. Common directional antennas include Yagi, parabolic, and log-periodic types, and they are used in broadcasting, radar, and cellular networks.

In lighting and optics, directioneel lighting directs light toward a defined area, enabling control of illumination, shadows, and contrast. Directional lighting is widely used in stage productions, architectural design, photography, and video production to emphasize subjects and reduce spill light.

Overall, directioneel highlights orientation-dependent behavior and is often contrasted with ontimodal or isotropic alternatives, where performance is uniform regardless of direction.