Garso lygio matavimai Šiaulių mieste buvo atlikti geguţės mėnesį. Tyrimų vietos buvo pasirinktos gyvenamojoje aplinkoje prie didţiųjų prekybos centų „Akropolis“, „Tilţė“, „Bruklinas“ ir „Saulės miestas“, gyvenamojoje aplinkoje prie geleţinkelio stoties, Šiaulių reabilitacijos centro aplinkoje, prie J. Janonio gimnazijos, kuriai didţiausią triukšmą sukelia autotransportas ir šalia Jovaro progimnazijos. Palyginimui, tose pačiose vietose matavimai buvo ir savaitgalio metu. Didţiausias ekvivalentinis garso lygis išmatuotas šalia prekybos centro „Saulės miestas“. Aukštas triukšmo lygis uţfiksuotas taip pat prie J. Janonio gimnazijos.. Vidutinis triukšmo lygis šalia gyvenamųjų namų išmatuotas netoli prekybos centrų „Tilţė“, „Akropolis“, „Bruklinas“ bei Jovaro progimnazijos aplinkoje, kuriuose garso lygiai viršija leistiną ribą 1 - 4 dBA. Šiaulių reabilitacijos centro aplinkoje neleistinų viršijimų nebuvo aptikta. Savaitgalio matavimuose didţiausias ekvivalentinis garso lygis buvo išmatuotas prie prekybos centro „Saulės miestas“. Gyvenamojoje zonoje prie geleţinkelio stoties ekvivalentinis garso lygis, lyginant su autotransporto skleidţiamais lygiais viršijamas net 12 dBA. / Sound levels were measured in month of May. Research test sites were near residential areas next to shopping centres „Saulės miestas“, „Bruklinas“, „Akropolis“, „Tilţė“, also in residential area near city railway station, in Šiauliai rehabilitation centre area, nearby J.Janonis gymnasium, whereat majority of noise is caused by motor transport, and next to Jovaras progymnasium. In comparison all the measurements have been conducted also in weekend. Highest equivalent sound level was measured near J. Janonis gymnasium. Average sound levels were detected in residential areas near shopping centres „Tilţė“, „Akropolis“, „Bruklinas“ and also in Jovaras progymnasium area, in which the equivalent sound level was exceeded by 1-4 dBA respectively. The sound levels in area near Šiauliai rehabilitation centre did not exceed the limits. The results that were conducted in weekend showed that the highest equivalent sound level was measured near the shopping centre „Saulės miestas“. Utmost sound level was measured near the railway station, where equivalent sound level was exceeded by 12 dBA. Specific noise of the railway transport is the major cause for it.

<p>This report is written on commission by WSP Acoustics. The report studies the outdoor sound levels on school yards in Stockholm. The questions given by the company to be answered was what are the actual sound levels at diffrent school yards with low traffic noise and how can you construct a facade element that reduces the sound level from the outside and meet the indoor requirements. Mesurements for four hours was done at eight schools set north and south of the city centre. The measurement period included one school break and one lunch break. The results of the measurements were that the equivalent and maximum sound level had small variations between the schools with some exceptions.The equivalent sound level was Leq 58-62 dB(A) and this shows a small variation. The school with the highest equivalent sound level of 67 dB was Maria skolan. This high level can be explained by more children on the school yard together at the same time etc. The maximum sound level was 85-89 dB(A), this if the level for Sofia skolan 82 dB was ignored. The level 85-89 dB(A) also shows a small variation. Calculations of the sound reduction index (R'w) for facade elements were also carried out for all the schools. The resulting sound reduction index for the whole facade was 34-41 dB. After assuming a 200 mm thick concrete facade for Sjöstadsskolan another calculation of building elements gives that the window have to reduce R'w 32 dB to meet the indoor requirements. In the future WSP Acoustics will use this report to choose building elements such as windows when building or rebuilding schools. It can also be used if any of the eight schools in this report needs a window changed to improve the acoustics.</p>

This report is written on commission by WSP Acoustics. The report studies the outdoor sound levels on school yards in Stockholm. The questions given by the company to be answered was what are the actual sound levels at diffrent school yards with low traffic noise and how can you construct a facade element that reduces the sound level from the outside and meet the indoor requirements. Mesurements for four hours was done at eight schools set north and south of the city centre. The measurement period included one school break and one lunch break. The results of the measurements were that the equivalent and maximum sound level had small variations between the schools with some exceptions.The equivalent sound level was Leq 58-62 dB(A) and this shows a small variation. The school with the highest equivalent sound level of 67 dB was Maria skolan. This high level can be explained by more children on the school yard together at the same time etc. The maximum sound level was 85-89 dB(A), this if the level for Sofia skolan 82 dB was ignored. The level 85-89 dB(A) also shows a small variation. Calculations of the sound reduction index (R'w) for facade elements were also carried out for all the schools. The resulting sound reduction index for the whole facade was 34-41 dB. After assuming a 200 mm thick concrete facade for Sjöstadsskolan another calculation of building elements gives that the window have to reduce R'w 32 dB to meet the indoor requirements. In the future WSP Acoustics will use this report to choose building elements such as windows when building or rebuilding schools. It can also be used if any of the eight schools in this report needs a window changed to improve the acoustics.

Purpose: This degree project has investigated the problems Södra Källtorp has with noise due to the nearby highway E18. The purpose of this work is to investigate whether Södra Källtorp meets the guideline values and also whether the implemented noise protection measures in the neighbourhood have caused a change regarding the noise level. Method: The method for carrying out this degree project consisted of a literature study and a case study. The case study was carried out through own measurements and calculations. Four measuring points were chosen. The first two are located in Södra Källtorp and are covered by the noise protection, while the last two are not covered by any noise protection and are located in Råby. Based on the measurement results, the daily equivalent sound level was calculated based on the annual average daily traffic for each measurement point. In addition, interviews were held in order to get a picture of the noise experience among the residents in the neighbourhood. Results: According to the measurement results, the daily equivalent sound level was 55 dBA and the daily maximum sound level 61 dBA for measuring point M1. For measuring point M2, the daily equivalent sound level was 46 dBA while the daily maximum sound level was 53 dBA. Measuring point U1 had a higher noise level than measuring point M1 and measuring point U2 had a higher noise level than measuring point M2. Conclusions: Conclusions that can be drawn are that the noise protection measures have made a change regarding the noise level in Södra Källtorp and that the noise levels in Södra Källtorp do not exceed the guideline values. However, most noise levels that occur in the neighbourhood are not approved according to WHO. More noise protection measures may need to be taken in the future in order to meet WHO’s recommendations.