No abstract

Within the boundaries of many municipal urbanized areas, large grounds are found, from which the noise is emitted into the environment, surrounded by the regions liable to acoustic protection. Such a condition generates many problems including also those ones related to the lack of the fulfillment of requirements concerning environmental protection against excessive noise. Therefore the aim of vital importance is the proper management of municipal grounds, both in view of the investment in policy steering, especially of new investments, and in the case of activities aimed at maintaining or restoring (revitalizing) the acoustic properties on the grounds that have already been used or simply degraded before.Keeping the scale of the problem in mind, such activities must be carried on not temporarily, but must have a systemic character. The structure of every system is characterized by the appropriate relationships among their elements and the properties of those relationships. In case of the noise management system, the elements of such a system are the activities connected with the management itself that are the actions which rely on specifying the aims and causing their realization within the scope and on the grounds subject to the managing entity. The superior aim of such activities should be to supply the tools for improvement of management and in the process of taking decisions that relate to investments including the of optimization conditions and maintenance of socio-economic importance of such areas.

No abstract

The article presents a method of limiting exposure to noise in the vicinity or workstations of conveyor drive services. This is done by setting up the conveyor belt personnel’s workstations within special technological recesses. The core of the presented solution consists in the design of an optimal set up of the technological recess, which in turn has enabled the realisation of production activities with OSH taken into account. The necessary requirement was a simultaneous achievement of the value of the equivalent noise level A LAeq below the value of relevant health standards. The results of the measurement were superimposed on the schematics of the mining excavation, and thus decided about the placement of the solution. New workstations were created and located according to the same schematics with the use of one-way exit with roof and the front wall and the side walls made of straight cross-bars of V29 profiles. Additionally, to improve the acoustic climate, the constructed technological recesses went through the acoustic adaptation performed with the use of sound absorbing material. The solution has been implemented in Węglokoks Kraj Sp. z o.o. KWK „Bobrek - Piekary”.

The article presents the results of soundscape assessments conducted in urban parks in the Silesian Voivodeship. The Silesian Voivodeship is characterised by a high degree of industrialisation and the greatest population density in Poland. The studies were conducted in the urban parks of all the cities in the voivodeship with populations of over 100,000 citizens. This selection was determined based on acoustic maps that are prepared for cities with populations of over 100,000 citizens as required by law, and on the fact that the role of urban parks is frequently marginalised in the context of city life. The goal of the studies was to define an objective acoustic appeal assessment method for urban parks in city centres. Measurements were carried out in 34 parks located in the centres of 12 cities. A-weighted sound levels L Aeq were determined for 107 measuring points in urban parks and the streets adjacent to them. Differences in the A-weighted sound levels L Aeq were presented for each studied park and the adjacent streets. Minimum and maximum sound values were subsequently determined for each measuring point. Significant differences in the minimum and maximum sound values in given locations were found despite minor differences in L Aeq values. It was also discovered that though parks may often exhibit high A-weighted sound levels L Aeq , there are other factors that influence the appeal of park soundscapes.