Naslov
Influence of Sound Source location and Absorption on Determination of Sound Power Levels
(Influence of Sound Source Location and Absorption on Determination of Sound Power Levels)

Autori
Varžić, Darije ; Galeta, Tomislav ; Prezelj, Jurij ; Šarić, Tomislav

Izvornik
Strojniški vestnik - Journal of Mechanical Engineering (0039-2480) 57 (2015), 4; 293-304

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
sound power level ; noise ; mechanical equipment ; maintenance

Sažetak
In this experimental paper, experimental research was performed in purpose to reveal detailed influence of two factors on measurement of sound power level: location of a sound source in the room and acoustic absorption of the room. In industrial environment, large machines are often grounded near to reflecting surfaces so those measuring criteria are not satisfied, or are at the minimum distances required in the standard. Most of the rooms could not also satisfy required magnitude of the environmental correction so we selected to examine the influence of different acoustic absorption of the room. The main goal of the research was to determine the standard deviations of measured sound power levels as a measure of reproducibility in different measurement conditions. Differences in the results of sound power levels’ measurement were within the values of 1 dB (A). The lowest measured values were obtained when source was located near the middle of the room and with the most covered room with absorbent material. Maximum values were when the source was located near the boundary surface of the room without absorption material.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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