the property of a microphone or antenna of being more sensitive to sounds coming from one direction than from another.
Also referred to as dispersion characteristic, this relates to a loudspeaker’s propagation pattern of sound. Smooth and even dispersion is generally considered an important attribute since room boundaries cause most of the sound to be reflected rather than direct. In the low bass, sound propagation is essentially omni-directional like a circular wave emanating from the impact of a rock. With rising frequencies, sound becomes directional and behaves like a more and more tightly focused spotlight.
Directivity describes the radiation pattern and the ability of an antenna to focus energy in a particular direction when transmitting or to receive energy better from a particular direction. In a static situation, system designers can use antenna directivity to concentrate the radiation beam in the wanted direction. However, in a dynamic system, where the transceiver is not fixed, the antenna should radiate equally in all directions, and this is known as an omni-directional antenna.
the property of a microphone or antenna of being more sensitive in one direction than in another
A measure of the angular dispersion of sound radiating from a loudspeaker. It is known that, for good sound in rooms, loudspeaker system directivity should be relatively constant over most of the frequency range. See: Directivity
Area of coverage of a speaker or microphone.
The ability of a speaker or horn to direct sound to a given area which can be described by its directivity factor (Q).
The area or areas of response of a microphone.
An effect of a fault rupturing whereby earthquake ground motion in the direction of rupture propagation is more severe than that in other directions from the earthquake source.
The theoretical characteristic of an antenna to concentrate power in only one direction, whether transmitting or receiving.
The property of radiating more energy in some directions than in others.
The ability of an antenna to radiate or receive more energy in some directions than in others. The degree of sharpness of the antenna beam.
In electromagnetics, directivity is a property of the radiation pattern produced by an antenna. It is defined as the ratio of the power radiated in a given direction to the average of the power radiated in all directions; the gain pattern is the product of the efficiency of the antenna and the directivity. Although it is a dimensionless quantity, it is often expressed in dBi (decibels isotropic).