ACOUSTICS. Klas Hagberg. HEAD OF ACOUSTICS SWEDEN Follow me on

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1 ACOUSTICS Klas Hagberg HEAD OF ACOUSTICS SWEDEN Follow me on

2 Program Intro - WSP Business Areas Building Acoustic in general - design Various constructions Failure on site Acousticfacts.com

3 D N LA 150 NORW AY CA A NAD UK FIN SWEDE N 50 ACOUSTIC CONSULTANTSD GLOBALLY UBAI AUS T RAL IA NEW ZEALAND

4 Sweden Gothenburg Building acoustics Environmental acoustics Room acoustics Structural vibrations Stockholm/Uppsala Building acoustics Aircraft noise Industrial acoustics Malmö/Jönköping/Karlstad Industrial noise Electro acoustics (mobile phones) Environmental acoustics

5 Business Areas Building acoustics Environmental noise mapping Industrial noise mapping Interior acoustics Room acoustics Electro acoustics Vibrations

6 Building Acoustics

7 Environmental & Industrial noise Noise mapping with CADNA and SoundPlan software

8 Interior Acoustics Measurements according to ISO and ISO 354 Evaluation acc to new Swedish standard proposal SS 25269

9 Electro Acoustics Development of new telephone models for Sony Mobile Speech alarm systems requirements and RASTI measurements

10 Room Acoustics Room acoustic design of cinemas Room acoustic design in public areas

11 Virtual Reality Model Creates real room models, incl. auralization. A computer model shows how different linings on walls and ceilings appear acoustically in a room. Architects and an acousticians can easily cooperate in the design of rooms creating desired sound properties. Almedahls Textiles

12 Vibrations Vibration surveillance Risk analysis

13 Building Acoustics Building Acoustics itself is a large topic Design Measurements Product knowledge Various structures and its behaviour Regulations Etc.

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15 acoustic consultant reports... SOUND REDUCTION 1/3 OCTAVE BADNS FREQUENCIES DECIBEL CALCULATIONS MEASUREMENTS ACOUSTICIANS...

16 Sound insulation Sound insulation / sound reduction index, R Should be as high as possible Impact sound level, Ln Should be as low as possible

17 Sound reduction index The sound reduction index is measured / calculated for each single 1/3 octave band value according to the formula: R = Lp1- Lp2 +10*log(S/A) - or the Standardized level diff. DnT = Lp1 - Lp2 +10*log(T/T0) Lp1 = Sound level in the sending room (with noise from a loudspeaker as a sound source) Lp2 = Sound level in the receiving room S = separating area A = sound absorption area in the receiving room Then the weighted sound reduction value is calculated acc to SS-EN ISO 717-1

18 Sound reduction value Sound reduction curve Different measures Rw R w DnTw RA R A RA,tr R w+c R w+c R w+ctr R w+ctr, R w+ctr, etc Frequency, Hz

19 Which sound reduction index should be valid? C, C ( ), Ctr etc. are called spectrum adaptation terms Various sound sources have different spectrum. The adaptation term fit the measure to a sound source A political way to meet an agreement

20 Spectrum adaptation terms in diagram Spectrum to calculate C and Ctr( ) 0-10 Lij db Spektrum 01 spektrum Frekvens, Hz

21 Same value, Rw different shapes [db] reduction index R betong Rw 58 db D 120/ M95 Rw 58 db frekvens [Hz]

22 Field value or laboratory value Depending on how the building products are connected to each other the final sound insulation might differ a lot from a laboratory measurement. Examples: Gypsum wall DD 70/ M140 - laboratory Rw=72 db In a building with a floor structure of 160 mm concrete R w=55 db SI decreases 17 db! Apply an upper floor construction for instance GIHA, R w=58 db an improvement 3 db!

23 Impact Sound The same is valid for impact sound,i.e L nw, wood L nw, concrete Even if the single numbers are identical see acuwood.com or on

24 Impact sound level, Ln The impact sound level is measured / calculated in each single 1/3 octave band level from Hz according to the formula: Ln=Lp+10*log (A/10) or LnT=Lp+10*log (T/0,5) Lp = sound level in the receiving room (with the impact sound machine as a sound source) A = Sound absorption area in the receiving room T = Reverberation time in the receiving room Then weighted impact sound level is calculated Lnw or LnTw One single value

25 Impact sound level Impact sound level Different measures Ln L n,w L n,w +CI L n,w +CI, Fre que ncy, H z

26 Same value but different shapes Lnw =58 db Lnw+CI, = 62 db Lnw =58 db Lnw+CI, = 57 db Impact sound level Impact sound level Frequency, Hz Frequency, Hz

27 EN BASTIAN

28 EN BASTIAN How does the sound appear in various structures? Sound insulation Room acoustics Sound propagation from installations Sound levels from traffic / facade sound insulation

29 Typical structures Prefabricated massive concrete Concrete casted in situ Prefabricated hollow concrete on steel structures with light weight walls Prefabricated hollow concrete and massive concrete walls Light weight structures Etc etc..

30 Building Acoustics - Dwellings Chabo 479 dwellings for students in Gothenburg close to Chalmers University of technology Designed to meet the minimum requirements in Sweden

31 HDF + upper floor + light weight walls HD/F 120/19, 330 kg minimum DD 70/ M140 Measurement results?

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33 Emilsborg

34 Prefabricated massive concrete pref. concrete / concrtete casted in situ / HD/F or similar Concrete 200 mm

35 Emilsborg R w+c = 60 db WSP Acoustics Prefabricated massive concrete

36 Tibblehemmet Täby WSP Acoustics Building Acoustics dwellings for elderly

37 R w+c = 56 db WSP Acoustics Amhult

38 Juvelkvarnen

39 Juvelkvarnen Reduktionstal ( Hz) Ref ( Hz)

40 Juvelkvarnen

41 Different Wooden structure systems Volume elements Setra group Martinssons Moelven Lelånghus Etc etc. Casette systems Masonite Moelven Södra Semi Fågelfors Etc etc

42 Masonite Flexible Building system (MFB)

43 Masonite Flexible Building system (MFB)

44 Masonite Flexible Building system (MFB) R w + C = db L nw = db L nw+ci, = db Read more at (in Swedish...)

45 Wooden and other typical lightweight structures Impact sound in a floor structure is almost always the weakest part If the impact sound requirement is fulfilled then also the airborne sound insulation will be fulfilled

46 Old attics Gyproc TCA Etc etc WSP Acoustics Andra konstruktioner

47 Low frequency problem in a semi detached house db L'n L'nw+Ci = 48 db k 2k 4k Hz

48 Airborne sound insulation C = -11 db R' R'w+C = 58 db k 2k 4k Hz

49 What happens?

50 Concrete plate should be divided

51 Suspended ceiling

52 Building Acoustics - hospitals Östra psykiatri High requirements between rooms and certain details. Architect White in Gbg

53 Sony Ericsson in Lund WSP Acoustics Building Acoustics - Offices

54 Nya Pedagogen in Göteborg WSP Acoustics Building Acoustics - Education

55 Building Acoustics - Dwellings

56 Kv. Venus; Approximately 1000 dwellings in an area exposed to noise from the motorway across Goteborg in Sweden to Norway, (E 6) WSP Acoustics Building Acoustics - Dwellings

57 Building Acoustics - Dwellings Winner of The building of the year 2006! Vavskedsgatan in Lunden, Gothenburg Construction: Concrete walls and floor structure built up by HD/F 120/27 (365 kg/m2) + GIHA sound floor (

58 Building Acoustics - product development Sound insulation data according to EN ISO and EN ISO available in BASTIAN database. Hence, calculations may be performed according to EN In cooperation with WSP Constr. design

59 Other products

60 Building Acoustics - Other Chalmers reaktorfysik rebuilding of a university unit to a gym center ( Friskis & Svettis)

61 Acoustics - Industry Arla Foods, Vimmerby: Design of new industrial plant for dry milk manufacturing Project manager: Tommy Zetterling

62 How far would you go to get a good sound environment?.com

63 Third party evaluation of acoustic products.

64 Why a site like this? New Swedish Standard SS Acoustic Characteristics Why new standard? Calculation of sound absorption factor, α, cannot be performed in a good way on modern sound absorbers due to their use and their geometries Classification of a product is not possible Measure according to ISO 354 but evaluate only the sound absorption area / object, Aobj i m 2 Compare the products in a standard room

65 Geometries

66 Presentation of results

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69 Become a member and get access to tools like: Calculate room reverberation time in a virtual room using products on the site. Compare and evaluation of products Get access to our online acoustics experts

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71 _FORUM

72 Future tools?

73 The countdown has begun! at acousticfacts.com SIGN UP!!

74 Thank you for your attention Klas Hagberg HEAD OF ACOUSTICS SWEDEN Follow me on