Recognition of the 24-hour Noise Exposure of a Human

Abstract

The civilisation progress has caused noise to become one of essential pathogenic and life comfort decreasing factors. There are several legal regulations aimed at controlling the noise influence on humans. Assessment of the twenty-four-hour influence of noises in various environments constitutes an essential problem. The answer can be supplied by 24-hour monitoring of the sound pressure. This paper is an attempt to learn the real loading of humans by noises. A personal noise indicator was used in measurements. The human 24-hour activity was divided into cycles allowing to model noise hazards. The collected data, even though they did not signal exceeding of individual standards, in the 24-hour period indicated the essential noise influence. These results indicate the need of investigations to recognise the 24-hour noise load of a human, with taking into account various forms of their activity and the need of rest.

Analysis of the Vibration Measurement and Reduction Possibilities in Linear Infrastructure for Vacuum Rail Technology

“…The system that allows to study vibrations along the track is to inform about the noise and vibration levels caused by the passage of capsule and to provide information about possible para-seismic vibrations that may affect the operation and use of hyperloop infrastructure (Korbiel et al, 2017). The system concept is based on the possibility to register vibrations and to provide information about the existing danger conditions.…”

Archives of Acoustics

“…1. There are two groups of indicators used in Poland to assess noise in the environment: (1) L DEN and L N used in long-term policy of environmental protection against noise and (2) L AeqD and L AeqN used to determine and control the conditions of using the environment in relation to one day (Korbiel et al, 2017). The methods for determining these indicators are included in the Regulation of the Minister of Environment (Journal of Laws, 2008).…”

Optimal geometry of the powered roof support’s operation

“…That is why it is so important from the perspective of mining development to constantly improve the design and operation of the entire roof support, that is, both powered and gallery-type roof supports. For powered roof support, which is built of independent sections, it is imperative to control [8,9] the operating parameters of these sections and, therefore, the entire roof support. The powered roof support protects the working space from the rock mass and must provide adequate space to operate other machines and ensure ventilation safety [10,11].…”