Noise It is an inarticulate or confusing sound that usually causes an unpleasant auditory sensation. In the area of telecommunications, ‘noise’ is a disturbance or an anomalous signal that occurs in a telecommunications system, which impairs transmission and prevents information from arriving clearly.
This word is also used to refer to a commotion. Likewise, this term refers to the commotion or strangeness that something causes. Comes from Latin rugĭtus.
Types of noises
Depending on the variability of the emission peak, three types of noise can be distinguished: continuous, intermittent and impact. Another way of classifying sounds distinguishes between white noise, pink noise and brown noise.
Depending on the origin of the noise, noises can be classified as: environmental (composed of several sounds in the environment in which one in particular does not stand out), specific (identifiable and associated with a single source) and initial (sound prior to a modification. ).
White noise
He White noise either white noise It is a type of signal that is random in nature and does not present a statistical correlation between its values at two different times. This type of noise presents all frequencies and its power is constant (the power density of the spectrum is flat). Some examples of white noise could be the sound produced by a vacuum cleaner running, a hair dryer. It got its name from association with the concept of ‘white light’.
industrial noise
He industrial noise It is that produced by human activities in this sector. It occurs, for example, in the operation of machinery in production processes such as in the metallurgy sector. Industrial noise is not only an occupational risk that can affect workers, but it can also cause disruption and annoyance to the nearby population (for example in a town where there is a factory) and also to the surrounding fauna.
In many countries there is legislation that regulates industrial noise to avoid derived problems. Some of them have to do, for example, with the use of protective equipment by workers or with the acoustic insulation of certain premises.
Difference between noise and sound
In a generic way, it can be said that the term ‘sound’ is broader than that of ‘noise’ since a noise is a type of sound that produces unpleasant sensations. From the point of view of Physics, noise differs from sound in that the former is irregular and there is no agreement between the fundamental tones and their harmonics while in sound there is.