What Does sound Mean
From the Latin sonitus , a sound is a sensation that is generated in the ear from the vibrations of things. These vibrations are transmitted by air or other elastic medium .
For physics , sound implies a phenomenon linked to the diffusion of a wave with elastic characteristics that produces a vibration in a body, even when these waves are not heard.
Sound audible to humans is made up of variations in air pressure, which the ear converts into mechanical waves so that the brain can perceive and process them.
When propagating, sound carries energy but not matter. The vibrations are generated in the same direction in which the sound is diffused: we can speak, therefore, of longitudinal waves .
It has been estimated that sound, when a temperature of twenty degrees Celsius is registered, reaches a speed in the air of three hundred and forty meters per second. It should be noted, therefore, that the speed achieved by sound is higher in solid media than in liquids, and that it is higher in the latter than in gases.
It is known as acoustic power , on the other hand, to the amount of energy in wave form that a certain source emits per unit of time. This power depends on the amplitude (the largest variation in the displacement of the wave motion).
The main qualities of the sound are the height (low, high or medium, depending on the frequency of the waves), the duration (the time in which the sound is maintained), the timbre (its characteristic feature) and the intensity (the amount energy it contains).
Sound effects for audiovisual productions
The film often highlighted mainly by visual achievements, whether large computer - generated worlds or mythical beings of colossal proportions which have been mixed with reality in a way so carefully that seem to be there . Depending on the musical sensibility, the pieces composed for the soundtrack are also respected, and many times they become myths.
However, there is one aspect of movies that generally goes unnoticed: the sound effects . It is likely that many people assume that if you hear footsteps on dry leaves, or the howl of a wolf, or the noise produced by an avalanche of snow that hits the trees and the cabins in its path, these have been recorded naturally. As surprising or incredible as it may seem, most of these sounds are "made" in specialized studios, using all kinds of tricks to bring a war, a gigantic robot, or nature itself to life.
Thinking of a blockbuster, it is fascinating that a scene in a forest needs effects created in a closed room full of musical instruments, synthesizers and computers to have sound and generate that feeling of immensity, of peace, to reproduce the songs of the birds, the blowing of the wind caressing the leaves.
The most interesting part of the effects creation process is the search for the right sound for each case; All kinds of elements are used, from objects that people usually have in their homes, such as glass glasses, cutlery, pieces of paper and cardboard, to what the imagination dictates to creatives, who are in charge of such a difficult task as ignored . Decisions are made that the audience would not consider possible or necessary, since many times the same action that occurs on the screen is avoided to choose an alternative path that, although it may seem absurd, generates a more effective and impactful result.