Conference_programme: 17.6 - Predicting vibration / impact / structure-borne sound in buildings
Lecture: Estimating maximum Fast time-weighted vibration levels from short equivalent continuous vibration level measurements of structure-borne sound sources on heavyweight plates
Author(s): Reinhold Steffi, Hopkins Carl, Seiffert Gary
Summary:
Characterisation of the structure-borne sound power according to EN 15657 provides input data for the prediction model in EN 12354-5. This allows the prediction of sound transmission based on building machinery running under steady-state conditions. However, most machinery runs in cycles which results in a time-varying power input into the building structure. For this reason, some European countries specify the noise requirements using the maximum Fast time-weighted sound pressure level. The overall aim of this work is to assess whether short (125ms) equivalent continuous vibration measurements in one-third octave bands on the reception plate have the potential to be used to determine a time-varying structure-borne sound power in short time intervals. This could then be used in EN 12354-5 to estimate the short (125ms) equivalent continuous sound pressure level in an adjacent room with an empirical correction to estimate the maximum Fast time-weighted sound pressure level. In this paper, idealised time-varying signals were created to compare maximum Fast time-weighted levels with short (125ms) continuous equivalent levels. Empirical corrections are developed that can be used to estimate Fast time-weighted maximum levels from short equivalent levels.
Corresponding author
Name: Ms Steffi Reinhold
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Country: Germany
