directivity
Focused emission property
Directivity is how strongly a device concentrates energy in one direction rather than spreading it evenly.
Antennas, microphones, and loudspeakers all have directivity—a shotgun microphone has high directivity, picking up sound from a narrow angle while rejecting noise from the sides.
In antenna design, directivity measures how well the antenna focuses radio waves toward a target.
The term appears in acoustics, electromagnetics, and audio engineering.
Sound amplification device
- microphoneAudio input device
- cardioidHeart-shaped geometric curve
- omnidirectionalReceiving from all sides
- bidirectionalOperating in both directions
figure-eight · transducer · sound · audio · wavefront · dispersion · anechoic · sensitivity
Energy propagation through space
- gainPositive return received
- lobeRounded projecting part
- parabolicShaped like a conic section
- dipoleSeparated opposite charges
sector · patch · isotropic · beamwidth · aperture · backscatter · reflector · propagation
Controlling direction of movement
- arrayOrdered collection or display
- synthesisCombining parts into whole
- waveguideStructure directing energy propagation
- polarizationSeparation into opposing extremes
bandwidth · modulation · interference · optimization · algorithm · gain · efficiency · DSP
Concentrated light device
- beamStructural support member
- spotlightConcentrated illumination source
- searchlightFocused lamp for distance
- flashlightPortable electric lamp
headlamp · lighthouse · collimation · divergence · intensity · illumination · projection · lens
Simplified explanatory sketch
- azimuthHorizontal directional angle
- elevationHeight above reference point
- indexAlphabetical guide to contents
- factorContributor to result
coefficient · ratio · DI · sensitivity · response · axis · angle · specification
loudspeaker
Sound amplification device
- microphoneAudio input device
- cardioidHeart-shaped geometric curve
- omnidirectionalReceiving from all sides
bidirectional · figure-eight · transducer · sound · audio · wavefront · dispersion · anechoic · sensitivity · pickup
radiation
Energy propagation through space
dipole · sector · patch · isotropic · beamwidth · aperture · backscatter · reflector · propagation · transmission
steering
Controlling direction of movement
- arrayOrdered collection or display
- synthesisCombining parts into whole
- waveguideStructure directing energy propagation
polarization · bandwidth · modulation · interference · optimization · algorithm · gain · efficiency · DSP · channel
laser
Concentrated light device
- beamStructural support member
- spotlightConcentrated illumination source
- searchlightFocused lamp for distance
flashlight · headlamp · lighthouse · collimation · divergence · intensity · illumination · projection · lens · reflector
diagram
Simplified explanatory sketch
- azimuthHorizontal directional angle
- elevationHeight above reference point
- indexAlphabetical guide to contents
factor · coefficient · ratio · DI · sensitivity · response · axis · angle · specification · calibration
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