Influences of External Error Sources on Measurements of Room Acoustic Parameters

Intro -- 1 Introduction -- 1.1 Objective -- 1.2 Outline -- 2 Fundamentals -- 2.1 Measurement Theory -- 2.1.1 Room Acoustic Measurements -- 2.1.2 Measurement Chain -- 2.1.3 Excitation Signal -- 2.2 Acoustic Theory -- 2.3 Room Acoustic Parameters -- 2.3.1 Reverberation Time -- 2.3.2 Sound Strength --...
Ausführliche Beschreibung

Intro -- 1 Introduction -- 1.1 Objective -- 1.2 Outline -- 2 Fundamentals -- 2.1 Measurement Theory -- 2.1.1 Room Acoustic Measurements -- 2.1.2 Measurement Chain -- 2.1.3 Excitation Signal -- 2.2 Acoustic Theory -- 2.3 Room Acoustic Parameters -- 2.3.1 Reverberation Time -- 2.3.2 Sound Strength -- 2.3.3 Energy Ratios -- 2.4 Assessment of Error Size -- 3 Noise Compensation -- 3.1 Noise Compensation Methods -- 3.1.1 Method A: Full Impulse Response -- 3.1.2 Method B: Truncation at Intersection Time -- 3.1.3 Method C: Truncation and Correction -- 3.1.4 Method D: Subtraction of Noise -- 3.1.5 Method E: Truncation, Correction, and Subtraction -- 3.2 Evaluation Approaches -- 3.2.1 Model Approach -- 3.2.2 Measurement Approach -- 3.3 Comparison of Noise Compensation Methods -- 3.3.1 Reverberation Time -- 3.3.2 Clarity Index -- 3.3.3 Sound Strength -- 3.4 Summary of Noise Compensation Methods -- 3.4.1 Random Errors -- 3.5 Further Influences -- 3.5.1 Implementation of Correction for Truncation -- 3.5.2 Excitation Signal -- 3.6 Conclusion -- 4 Impulsive Noise Detection -- 4.1 Theory -- 4.2 Detection of Impulsive Noise -- 4.2.1 Proposed Detection Algorithm -- 4.3 Experimental Validation -- 4.3.1 General Assembly Hall -- 4.3.2 Ordinary Room -- 4.4 Summary and Conclusion of Impulsive Noise -- 5 Time Variances -- 5.1 Air Movement -- 5.1.1 Measurement Setup -- 5.1.2 Analysis of Measurements -- 5.1.3 Statistical Summary -- 5.1.4 Discussion -- 5.2 Inter-Measurement Temperature Changes -- 5.2.1 Eurogress Measurements -- 5.2.2 Assembly Hall Measurements -- 5.2.3 Detailed Analysis of Clarity Index -- 5.2.4 Summary -- 5.2.5 Conclusion -- 5.3 Intra-Measurement Temperature Changes -- 5.3.1 Measurement Setup -- 5.3.2 Analysis -- 5.3.3 Summary -- 5.3.4 Conclusion -- 5.4 Person Scatter -- 5.4.1 Measurement Setup -- 5.4.2 Analysis -- 5.4.3 ANOVA -- 5.4.4 Summary. Ausführliche Beschreibung