Sounds that have a negative effect on people, are undesirable, make no sense to the listener, and are unpleasant are called noise. Considering this definition, it is understood that the sound does not necessarily have to be at a high level in order to have the quality of noise. Especially in our big cities, noise intensities are quite high and the distinction between sound and noise may vary according to people. Some sounds that sound like music to some people’s ears can be irritating to other people and are perceived as noise. The limit of discomfort can also differ from person to person. However, it is a fact that noise disrupts human health and comfort, has negative psychological effects, and if the noise is continuous, the psychological effect will be permanent.
The rms value of vibration (in terms of displacement, velocity, acceleration): It expresses the square root of the mean of the squares of the vibration values measured in a certain time interval.
Noise is one of the most common environmental pollutions today. The human body automatically and unconsciously reacts to sudden and loud sounds. Scientific evaluations of individuals whose continuous physiological parameters (frequency cardiac) and electroencephalograms were recorded clearly demonstrated the physiological effects of noise.
Sources of Noise
Noise is an important problem recognized by modern societies, if natural noises are excluded. It increases in parallel with urbanization and industrialization, and the sources of noise are diversified. The sources of noise may differ from country to country depending on the cultures of the societies, but the main difference when determining the standard is the technology and tools used.
Indoor Noises
Noises arising from all kinds of mechanical and electronic systems and various vital activities in the buildings, which also affect the users in separate or adjacent buildings.
For example, house vehicles, stereos, loud conversations, footsteps, friction of furniture, blows, office noises, various machinery and equipment (elevator, plumbing, ventilation, water booster sound, etc.) noises can be given.
Non-Building Environmental Noises
These are the noises located outside the buildings that affect both the volumes inside the building and the individuals using the open spaces outside the building. These can also be classified as follows:
Transportation noises (Necessary and unnecessary horn sound, convoy horn sounds at weddings and engagements, highway, railway, airport)
Industry noises (Industrial vehicle, machinery, workplace noise)
Construction noises (Construction, road construction, demolition, etc.)
Recreational noises (Amusement places, playground, sports fields, shooting areas, etc.)
Commercial noises (Outdoor cinemas, entertainment venues, advertising, music broadcasts, audio vendors, etc.)
Natural Noises
Volcanic eruptions, rain, lightning, wind, earthquakes (earthquakes), underwater noises (caused by earthquakes) are called.
