Sound propagation indoors
Measurements reproducibility
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- The Aurora Acoustical Parameters and STI Plugins
Measurements reproducibilityTesting different Dummy-Heads (for IACC) and Pressure-velocity microphones (for Lateral Fraction) in the same room with the same source and comparing the results we can see that these measurements are not very scientific and each dummy head/microphone can give a different result. This means we can trust this measurements for spatial analysis only when used comparatively, we can’t take them as absolute. The Aurora Acoustical Parameters and STI PluginsAurora software has a nice plugin for IR’s analysis which can give us all the parameters contained in the ISO 3382 standard. We can also isolate single frequency and observe IR and parameters resulting from the analysis. 
Fig. 10 – Acoustical Parameters plugin. Another very useful Aurora plugin is STI, which computes the Speech Transmission Index:  
Fig. 11 – Acoustical Parameters plugin. Speech Transmission Index SOUND PROPAGATION INDOORS 1 Direct and Reflected sound 1 Properties of materials 2 Indoor acoustic field 4 Reverberation Time 7 Reverberation Time T60 7 Acoustical Parameters 12 The ISO 3382 Standard 12 From Impulse Response to Sound Decay 12 Reverberation Time 15 Early – Late Parameters 15 Other Parameters 18 Measurements reproducibility 19 The Aurora Acoustical Parameters and STI Plugins 20 1 - The STI method 21 2 - MTF from impulse Response 23 3 – Transducers: mouth simulator 25 4 – Noise-free IR Method (Aurora Plugins) 28 4.1 - Calibration 28 4.2 - Background Noise spectrum 29 4.3 - Signal spectrum 29 4.4 - Impulse Response (noise-free, ESS method) 30 Directory: Public Public -> Acm word Template for sig site Public -> The german unification, 1815-1870 Public -> Preparation of Papers for ieee transactions on medical imaging Public -> Harmonised compatibility and sharing conditions for video pmse in the 7 9 ghz frequency band, taking into account radar use Public -> Adjih, C., Georgiadis, L., Jacquet, P., & Szpankowski, W. (2006). Multicast tree structure and the power law Public -> Duarte, G. Pujolle: fits: a flexible Virtual Network Testbed Architecture Public -> Swiss Federal Institute of Technology (eth) Zurich Computer Engineering and Networks Laboratory Public -> Tr-41. 4-03-05-024 Telecommunications Public -> Chris Young sets 2016 “I’m Comin’ Over” Tour headlining dates Download 4.46 Mb. Share with your friends:
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