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Laboratory Evaluation of Annoyance of Low Frequency Noise

Table of contents

Foreword and acknowledgements
 
Introduction. Objective of the Project
 
Summary
 
Udvidet resumé
 
1 Background
1.1 Infrasound
1.2 Low Frequency Noise
1.3 Motivation for the Investigation
 
2 Description of the Listening Tests
2.1 Noise Examples
2.2 Noise duration, levels and presentation
2.3 Filtering of the Noise Signals
2.4 Test Subjects
2.5 Subject’s Task
 
3 Primary Results of the Listening Tests
3.1 Statistical Analysis of Primary Results
3.2 Statistical Analysis of the Results from the Special Group
 
4 Assessment Methods for Low Frequency Noise
4.1 Danish Method
4.2 German Method
4.3 Swedish method
4.4 Polish Method
4.5 Dutch Proposed Method, Sloven
4.6 Dutch Criterion for Audibility
4.7 C-weighted Sound Pressure Level
4.8 Comparison of Criterion Curves
 
5 Objective Analysis of the Noise Examples
5.1 One-third octave spectra
5.2 Comparison to criterion curves
 
6 Comparison of Subjective Evaluation of Annoyance with Objective Measures
6.1 Danish Method
6.2 German A-level
6.3 German Tonal Method
6.4 Swedish Method
6.5 Polish Method
6.6 Dutch Proposal, Sloven
6.7 C-weighted Level
6.8 Overview of the Results
 
7 Results obtained with the Special Group
7.1 Comparison of the two groups of test persons
7.2 Comparison of the assessments of loudness and annoyance by the special group
7.3 Comparison of subjective evaluation of annoyance with objective measures
7.4 Discussion of results from the special group
 
8 General discussion
8.1 The Experimental Method
8.2 Low Frequency Hearing Thresholds
8.3 Criteria and Measurement Methods
8.4 Statistical analysis
8.5 Noise limits, Criteria curves and equal loudness level contours
 
9 Conclusion
 
10 References
 
Annex A 1. Data from the Subjective Evaluations
 
Annex B 1. Data from Objective Measurements

 

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