Availability: Investigations into damping in building acoustics by use of downscaled models

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Bibliographic Details
Main Author:	Kling, Christoph (Author)
Format:	Thesis/Dissertation Book
Language:	English
Published:	Berlin Logos-Verl. 2008
Series:	Aachener Beiträge zur Technischen Akustik 7
Subjects:	Hochschulschrift
Links:	http://deposit.dnb.de/cgi-bin/dokserv?id=3145389&prov=M&dok_var=1&dok_ext=htm http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=018594475&sequence=000003&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA
Physical Description:	203 S. Ill., graph. Darst.
ISBN:	9783832519858

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Record in the Search Index

DE-BY-TUM_call_number	0001 2012 A 2431
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adam_text	INVESTIGATIONS INTO DAMPING IN BUILDING ACOUSTICS BY USE OF DOWNSCALED MODELS VON DER FAKULTAT FUR ELEKTROTECHNIK UND INFORMATIONSTECHNIK DER RHEINISCH-WESTFALISCHEN TECHNISCHEN HOCHSCHULE AACHEN ZUR ERLANGUNG DES AKADEMISCHEN GRADES EINES DOKTORS DER NATURWISSENSCHAFTEN GENEHMIGTE DISSERTATION VORGELEGT VON DIPLOMPHYSIKER CHRISTOPH KLING AUS BRAUNSCHWEIG BERICHTER: UNIVERSITATSPROFESSOR DR. RER. NAT. MICHAEL VORLANDER UNIVERSITATSPROFESSOR DR.-LNG. MICHAEL MOSER TAG DER MUNDLICHEN PRUFUNG: 29. APRIL 2008 TABLE OF CONTENTS ABSTRACT 5 ZUSAMMENFASSUNG 6 PREFACE 7 1 INTRODUCTION 13 2 PROPERTY DETERMINATION OF MODEL MATERIALS 19 2.1 MATERIAL DENSITY AND ISOTROPY 19 2.2 DYNAMIC MODULI BY USE OF CLASSICAL METHODS 21 2.2.1 YOUNG S MODULUS FOR ACRYLIC GLASS BY A RESONANCE METHOD. 21 2.2.2 YOUNG S MODULUS FOR ACRYLIC GLASS BY A PHASE METHOD 22 2.3 MATERIAL DAMPING BY USE OF CLASSICAL METHODS 25 2.4 GENERAL DISADVANTAGES OF CLASSICAL METHODS 28 2.5 THE N-PARAMETER METHOD 29 2.5.1 A SURVEY OF THE LINEAR VISCO-ELASTIC THEORY 30 2.5.1.1 MEMORY FUNCTIONS IN THE TIME DOMAIN 30 2.5.1.2 COMPLEX MODULUS IN THE FREQUENCY DOMAIN 32 2.5.1.3 ISOTROPIC MATERIAL 33 2.5.2 THE CANONICAL ILLUSTRATION 34 2.5.3 GENERAL APPROACH TO IDENTIFY THE VISCO-ELASTIC MATERIAL PARAMETERS 38 2.6 EXPERIMENTS USING THE N-PARAMETER METHOD 40 2.6.1 YOUNG S MODULUS FOR SILICONE 40 2.6.2 YOUNG S MODULUS FOR ALUMINIUM 46 2.6.3 YOUNG S MODULUS AND THE SHEAR MODULUS FOR ACRYLIC GLASS. .49 2.6.4 UNCERTAINTIES 55 3 SCALING RULES FOR BUILDING ACOUSTICS TASKS 57 C. KLING: INVESTIGATIONS INTO DAMPING IN BUILDING ACOUSTICS BY USE OF DOWNSCALED MODELS 3.1 DERIVATION OF THE SCALING RULES 57 3.1.1 AIRBORNE SOUND 57 3.1.2 STRUCTURE BORNE SOUND 58 3.1.3 LOSS FACTORS 61 3.1.4 ROOM REVERBERATION TIME 62 3.1.5 SOUND REDUCTION INDEX 64 3.1.6 FURTHER QUANTITIES 65 3.2 MEASUREMENT DEVICES 66 3.2.1 MODEL SOUND SOURCES 66 3.2.2 TRANSDUCERS FOR MODEL MEASUREMENTS 69 3.2.3 DATA ACQUISITION AND ANALYSERS 70 3.2.4 ACCESSORY 70 3.3 MEASUREMENT METHODS 71 4 DOWNSCALED VERSION OF A WALL TEST FACILITY FOR DAMPING MEASUREMENT 73 4.1 APPLICATION OF THE SCALING RULES TO A SPECIAL CASE 73 4.2 DESIGN & CONSTRUCTION OF THE MODEL 74 4.3 ROOM-ACOUSTIC PROPERTIES OF THE MODEL 77 4.3.1 ROOM MODES 77 4.3.2 REVERBERATION TIME 78 4.3.3 DIFFUSIVITY 79 4.3.4 SURFACE ABSORPTION 80 4.4 BUILDING ACOUSTIC PROPERTIES OF THE MODEL 81 4.4.1 SOUND REDUCTION INDEX OF A THICK WALL 81 4.4.2 SOUND REDUCTION INDEX OF A THIN WALL 85 5 DAMPING EFFECTS ON A DOWN SCALE 89 5.1 POTENTIAL DAMPING EFFECTS 89 5.1.1 RADIATION DAMPING 90 5.1.2 GAS PUMPING 91 5.1.3 ACOUSTICAL BOUNDARY LAYER 91 5.1.4 SURFACE FRICTION 92 5.1.5 AIR DAMPING 93 10 TABLE OF CONTENTS 5.1.6 INTERNAL MATERIAL DAMPING 94 5.1.7 COUPLING LOSS 95 5.2 LOSS FACTORS OF A SINGLE-LEAF PARTITION WALL 796 5.2.1 THE MAIN LOSS FACTORS 97 5.2.2 MEASUREMENT OF THE TOTAL LOSS FACTOR 97 5.2.3 MEASUREMENT OF THE RADIATION LOSS FACTOR 98 5.2.4 MEASUREMENT OF THE INTERNAL LOSS FACTOR 100 5.2.5 BALANCE EQUATION OF A WALL 102 5.2.6 DETERMINATION OF THE COUPLING LOSS FACTOR 103 5.3 EXPERIMENTAL SPLITTING OF THE LOSS FACTORS OF A DOWNSCALED PARTITION WALL 103 5.4 SOUND REDUCTION INDEX WITH DIFFERENT METHODS 108 6 STEADY-STATE STATISTICAL ENERGY ANALYSIS OF A WALL TEST FACILITY 113 6.1 THEORY OF STATISTICAL ENERGY ANALYSIS (SEA) 113 6.1.1 THE BASIC RELATIONS OF SEA 115 6.1.2 SEA OF THE STEADY STATE 118 6.2 APPLYING SEA TO A WALL TEST FACILITY 120 6.3 MODAL DENSITY OF THE SUBSYSTEMS 122 6.4 THE LOSS FACTORS OF THE MODEL WALL TEST FACILITY 124 6.4.1 INTERNAL LOSS FACTOR OF A ROOM 124 6.4.2 INTERNAL LOSS FACTOR OF A WALL 125 6.4.3 COUPLING LOSS FACTOR BETWEEN TWO WALLS 126 6.4.4 COUPLING LOSS FACTOR FROM A WALL TO A ROOM 127 6.4.5 COUPLING LOSS FACTOR FROM A ROOM TO A WALL 128 6.4.6 COUPLING LOSS FACTOR BETWEEN TWO ROOMS 129 6.5 SEA-IMPLEMENTATION OF THE MODEL TEST FACILITY 130 6.6 SOUND REDUCTION INDEX 132 6.7 PATH ANALYSIS 135 6.7.1 PATH ANALYSIS ACCORDING TO EN 12354-1 135 6.7.2 PATH ANALYSIS BY SEA 138 6.8 SUBSYSTEM ENERGIES 145 6.9 POWER FLOW BETWEEN THE SUBSYSTEMS 149 6.10 POWER BALANCE OF THE PARTITION 151 11 C. KLING: INVESTIGATIONS INTO DAMPING IN BUILDING ACOUSTICS BY USE OF DOWNSCALED MODELS 6.11 LOSS FACTOR BALANCE 154 7 TRANSIENT STATISTICAL ENERGY ANALYSIS OF REVERBERATION PROCESSES 159 7.1 SEA OF A TRANSIENT PROCESS 160 7.2 APPLICATION TO A REVERBERATION PROCESS 161 7.3 DISCRETISATION FOR NUMERICAL SOLUTION 163 7.4 REVERBERATION MEASUREMENTS FOR COMPARISON 165 7.5 SUBSYSTEM ENERGIES 168 7.6 SUBSYSTEM SLOPES 171 7.7 POWER FLOWS BETWEEN SUBSYSTEMS 175 7.8 LOSS FACTORS ACCORDING TO CLASSICAL T15-METHOD 179 7.8.1 IMPULSE TO THE THICK WALL 179 7.8.2 IMPULSE TO THE THIN WALL 181 7.8.3 IMPULSE TO A ROOM 183 7.9 TROUBLING SUBSYSTEMS 185 8 SUMMARY & CONCLUSIONS 189 REFERENCES 195 CURRICULUM VITAE 205 12
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discipline	Maschinenbau / Maschinenwesen Bauingenieurwesen
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series	Aachener Beiträge zur Technischen Akustik
series2	Aachener Beiträge zur Technischen Akustik
spellingShingle	Kling, Christoph Investigations into damping in building acoustics by use of downscaled models Aachener Beiträge zur Technischen Akustik
subject_GND	(DE-588)4113937-9
title	Investigations into damping in building acoustics by use of downscaled models
title_auth	Investigations into damping in building acoustics by use of downscaled models
title_exact_search	Investigations into damping in building acoustics by use of downscaled models
title_full	Investigations into damping in building acoustics by use of downscaled models Christoph Kling
title_fullStr	Investigations into damping in building acoustics by use of downscaled models Christoph Kling
title_full_unstemmed	Investigations into damping in building acoustics by use of downscaled models Christoph Kling
title_short	Investigations into damping in building acoustics by use of downscaled models
title_sort	investigations into damping in building acoustics by use of downscaled models
topic_facet	Hochschulschrift
url	http://deposit.dnb.de/cgi-bin/dokserv?id=3145389&prov=M&dok_var=1&dok_ext=htm http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=018594475&sequence=000003&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA
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Call Number:	0001 2012 A 2431
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