The basis of the term directionality is direction, a word that comes from the Latin union of three very clearly differentiated parts. In this way, we can say that the root of the term in question is formed from the union of the prefix di- which means “multiple divergence”, the verb regere which is synonymous with “govern” and the suffix -tion which is the action or the effect of something
Directional is something that can be oriented or directed in a direction. This quality is known as directionality, a concept that is associated with the idea of direction (the path that a body takes when moving, the tendency towards a certain goal or the guide that allows someone or something to be directed).
In this sense, we can state that, although there are many elements that are characterized by this quality, one of the most studied forms of directionality is that which occurs in writing. And it is important that from an early age people are taught to make a correct direction of the spellings.
Precisely in this sense, graphologists, who are in charge of studying the particularities of an individual’s handwriting in order to determine its psychological qualities from it, put a lot of interest and dedication in the analysis of its directionality. And it is that it can give them very exact clues to discover the signs of identity of that one.
In addition to all this, it must also be established that directionality is also discussed in order to talk about what communication is. Thus, for example, it is often said that a communication is when there is both a sender and a receiver using the same channel and these messages are transmitted not at the same time but first one and then the other. An example of this type of communication is the one that occurs through the use of walkie talkies.
The concept of directionality is widely used in relation to microphones, which are devices that allow sound waves to be amplified. In this way, we can find the microphone with variable directionality, whose potentiometer is what makes it possible to choose the direction. According to Abbreviationfinder, DC stands for Directionality Classification
These microphones can be omnidirectional, bidirectional, cardioid, supercardioid, or hypercardioid.
Omnidirectional microphones are able to pick up any sound regardless of the direction from which it is coming, since they constantly maintain their sensitive responsiveness.
The bidirectional microphone, on the other hand, can only pick up the sound waves that it receives on its front and back sides. This means that sounds coming from the sides are not recorded.
Cardioid microphones, on the other hand, are unidirectional microphones that have a better response to the waves that are picked up by their front, thanks to the shape of their diaphragm.
The supercardioid microphone has a lower recording angle than the cardioids, something that acts as a kind of filter against ambient noise.
Finally, a hypercardioid microphone resembles a cardioid device, but because its front lobe is narrower and its rear side is less sensitive, it provides an altered response compared to the other type of device.
