Noise and vibration regulations on site
Introduction
Noise is the inarticulate auditory sensation, generally unpleasant.[1] In the environment, it is defined as anything that is annoying to the ear or, more precisely, as any unwanted sound. From that point of view, the most excellent music can be classified as noise by the person who at a certain moment does not want to hear it.
In the field of sound communication, noise is defined as any unwanted sound that interferes with communication between people or their activities.
When the expression noise is used as a synonym for noise pollution, we are referring to a noise (sound), with a high intensity (or a sum of intensities), which can even be harmful to human health. Against excessive noise, earplugs and earmuffs (ear helmets, which contain electronics that reduce outside noises, reducing them or making your hearing more pleasant) are used to prevent hearing loss (which, if not controlled, can cause deafness).
Measurement
Sound is measured based on the amplitude and frequency of a sound wave. The amplitude measures the strength of the wave. The energy of a sound wave is measured in decibels (dB), the measure of loudness, or intensity (physical) intensity) of a sound; This measurement describes the amplitude of a sound wave. Decibels are expressed on a logarithmic scale. On the other hand, pitch describes the frequency of a sound and is measured in hertz (Hz).[2].
The main instrument for measuring sounds in the air is the Sound Level Meter. There are many different varieties of instruments used to measure noise - Noise dosimeters are often used in occupational settings, noise monitors are used to measure ambient noise and noise pollution, and recently smartphone-based sound level meter applications[3] are being used to crowdsource and map recreational and community noise.[4][5][6].
A" weighting is applied to a sound spectrum to represent the sound that humans are capable of hearing at each frequency. Sound pressure is expressed in terms of dBA. 0 dBA is the lowest level that a person can hear. Normal voices are around 65 dBA. A rock concert can be around 120 dBA.