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|Type:||Artigo de evento|
|Title:||Corrections In Sound Power Level Determination Using Intensity Measurements|
|Author:||De Brito L.A.P.F.|
|Abstract:|| Many Brazilian cities have been facing noise pollution problems. Traffic noise is considered the first annoyance source, followed by civil construction equipments noise. It is paramount to control emission and propagation noise in civil engineering sites to maintain quality of life. Sound power level is an important parameter to predict sound propagation in the environment. The use of intensity measurements makes possible to obtain the sound power level of noise sources in situ, even if other sources are present. With this technique it is not necessary to move the source to reverberation or anechoic chambers. This work studied the efficiency of corrections applied to sound power level determination using intensity measurements. Intensity measurements of electric drills were carried out using a Bruel & Kjaer sound intensity probe. Sound power level was calculated applying corrections suggested in the literature. The results were compared with sound power level measured in special rooms. There was no statistic significant difference between sound power level obtained in special rooms and intensity measurements. With this work the authors intend to spread the intensity measurement technique and use sound power level determination of civil construction equipments to build a support database for environmental noise prediction software.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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