VRIJE UNIVERSITEIT BRUSSEL Acoustics - the Dept. of ...

More documents

Recommendations

Info

114 CHAPTER 6. NOISE CONTROL– Isolation of the source.– Discontinuities in combination with extra damping.Increasing only the damping is not sufficient in this area.Figure6.15: The cart with freepanels emits less sound thanthe original cart.Figure 6.16: Lowering the transmission by increasing the mass.
6.4. RADIATION NOISE 115Figure 6.17: Reduction of the transmission of structure-borne noise by discontinuities.Figure 6.18: Isolation of structural noise in pipes.6.4 Radiation noiseAir-borne noise can be radiated through outlet openings (e.g. the end of atube). Usually the noise has a directivity in the direction along the axis ofthe tube. The opening can be adjusted to reduce the noise in this direction.
Page 1:
VRIJE UNIVERSITEITBRUSSELAcousticsB
Page 4 and 5:
iiWhen sound becomes noise, it will
Page 7 and 8:
ContentsI Introduction to acoustics
Page 9 and 10:
CONTENTSvii4.3 Measuring the acoust
Page 11:
Part IIntroduction to acoustics1
Page 14 and 15:
4 CHAPTER 1. FUNDAMENTAL CONCEPTS O
Page 16 and 17:
Page 18 and 19:
Page 20 and 21:
10 CHAPTER 1. FUNDAMENTAL CONCEPTS
Page 22 and 23:
Page 24 and 25:
Page 26 and 27:
Page 28 and 29:
Page 30 and 31:
Page 32 and 33:
Page 34 and 35:
24 CHAPTER 2. THE HUMAN HEARING SYS
Page 36 and 37:
Page 38 and 39:
Page 40 and 41:
Page 42 and 43:
Page 44 and 45:
34 CHAPTER 3. MEASURING SOUNDconver
Page 46 and 47:
36 CHAPTER 3. MEASURING SOUNDFigure
Page 48 and 49:
Page 50 and 51:
Page 52 and 53:
Page 54 and 55:
44 CHAPTER 3. MEASURING SOUNDfactor
Page 56 and 57:
Page 58 and 59:
Page 60 and 61:
50 CHAPTER 3. MEASURING SOUNDFor ex
Page 62 and 63:
52 CHAPTER 3. MEASURING SOUNDderiva
Page 64 and 65:
54 CHAPTER 3. MEASURING SOUNDThe so
Page 66 and 67:
56 CHAPTER 3. MEASURING SOUND
Page 69 and 70:
Chapter 4Sound AbsorptionAll(constr
Page 71 and 72:
4.1. ACOUSTIC TRANSMISSION BETWEEN
Page 73 and 74: 4.1. ACOUSTIC TRANSMISSION BETWEEN
Page 75 and 76: 4.2. REALIZATION OF ACOUSTIC ABSORP
Page 81 and 82: 4.3. MEASURING THE ACOUSTIC ABSORPT
Page 87 and 88: 4.4. THE DIRECT AND DIFFUSE SOUND F
Page 89 and 90: 4.4. THE DIRECT AND DIFFUSE SOUND F
Page 91 and 92: Chapter 5Sound InsulationWhen consi
Page 93 and 94: 5.1. MEASURING SOUND INSULATION 83F
Page 95 and 96: 5.1. MEASURING SOUND INSULATION 85F
Page 97 and 98: 5.2. AIRBORNE SOUND INSULATION OF A
Page 105 and 106: 5.3. THE ACOUSTICAL BARRIER 95For t
Page 107 and 108: 5.3. THE ACOUSTICAL BARRIER 97Figur
Page 109 and 110: Chapter 6Noise control6.1 Origin of
Page 111 and 112: 6.1. ORIGIN OF NOISE 101Figure 6.2:
Page 113 and 114: 6.2. REDUCING NOISE AT THE LEVEL OF
Page 121 and 122: 6.3. TACKLING NOISE TRANSMISSION 11
Page 123: 6.3. TACKLING NOISE TRANSMISSION 11
Page 127 and 128: 6.4. RADIATION NOISE 117Figure 6.20
Page 129: Part IIINoise directives119
Page 132 and 133: 122
Page 134 and 135: 124CHAPTER 7. DIRECTIVE 2000/14/EG:
Page 136 and 137: 126CHAPTER 7. DIRECTIVE 2000/14/EG:
Page 138 and 139: 128 CHAPTER 8. NOISE ON THE WORK FL
Page 150 and 151: 140 CHAPTER 9. COMMUNITY NOISE2. No
Page 152 and 153: 142 CHAPTER 9. COMMUNITY NOISE
Page 154 and 155: 144 APPENDIX A. MATERIAL PROPERTIES
Page 162: 152 BIBLIOGRAPHY[12] Bruel and Kjae
show all

VRIJE UNIVERSITEIT BRUSSEL Acoustics - the Dept. of ...

Create successful ePaper yourself

Delete template?

Save as template?