1. Solutions for Better Sounding Rooms Copyright 2003 PMI, Ltd.

2. IntroductionIntroduction Why talk about acoustics?Why talk about acoustics? – Acoustics are audible! – Contribute to over 50% of quality – Acoustics are fixable Why talk about acoustics?Why talk about acoustics? – Acoustics are audible! – Contribute to over 50% of quality – Acoustics are fixable

3. Copyright 2003 PMI, Ltd. The Acoustic Interface Electronics Interface is under controlElectronics Interface is under control Source Controller Power Amplifiers Equalizers Take control of acoustic interfaceTake control of acoustic interface

4. Copyright 2003 PMI, Ltd. What’s Acoustics? It’s about the speaker/room/listener interfaceIt’s about the speaker/room/listener interface It’s the final frontier!It’s the final frontier! It’s about the speaker/room/listener interfaceIt’s about the speaker/room/listener interface It’s the final frontier!It’s the final frontier!

5. Copyright 2003 PMI, Ltd. Enhancements from Acoustic Treatments Clear dialogClear dialog Precise sound localizationPrecise sound localization Spacious surroundSpacious surround Smooth sound movementSmooth sound movement Even tonal balanceEven tonal balance Every seat a good seatEvery seat a good seat Clear dialogClear dialog Precise sound localizationPrecise sound localization Spacious surroundSpacious surround Smooth sound movementSmooth sound movement Even tonal balanceEven tonal balance Every seat a good seatEvery seat a good seat

6. Room Reflections Copyright 2003 PMI, Ltd.

7. Reflections = Distortion

8. Copyright 2003 PMI, Ltd. Room Reflections Sound reflections degrade sound quality and sound stagingSound reflections degrade sound quality and sound staging Loudspeaker Reflected Path Listener Direct Path

9. Copyright 2003 PMI, Ltd. At main seat you listen to more reflected sound than direct!At main seat you listen to more reflected sound than direct! The room plays an important part in the sound you hearThe room plays an important part in the sound you hear Room Reflections Did you Know?! Acoustic treatments take control of reflected soundsAcoustic treatments take control of reflected sounds

10. Copyright 2003 PMI, Ltd. Solutions to Room Reflections Absorption

11. Copyright 2003 PMI, Ltd. Solutions to Room Reflections Absorption Absorptive materialsAbsorptive materials – CinePanel Absorber Loudspeaker Listener Direct Path Reflected Path Absorptive Material Absorptive Material Absorptive Material Absorptive Material

12. Copyright 2003 PMI, Ltd. Acoustical Treatments Absorption Thickness 1” Panels work down to 1kHz1” Panels work down to 1kHz 2” Panels work down to 500Hz (better)2” Panels work down to 500Hz (better) 4” CinePanel works down to 250Hz (best)4” CinePanel works down to 250Hz (best) 1” Panels work down to 1kHz1” Panels work down to 1kHz 2” Panels work down to 500Hz (better)2” Panels work down to 500Hz (better) 4” CinePanel works down to 250Hz (best)4” CinePanel works down to 250Hz (best) Absorption 250Hz 500Hz1kHzFrequency 1”2” 4”

13. Copyright 2003 PMI, Ltd. Solutions to Room Reflections Diffusion

14. Copyright 2003 PMI, Ltd. Solutions to Room Reflections Diffusion Diffusive materialsDiffusive materials – CinePanel diffusers Loudspeaker Listener Direct Path Reflected Path Diffuser

15. Copyright 2003 PMI, Ltd. Acoustical Treatments Diffusion Balance diffusion and absorptionBalance diffusion and absorption Keep some liveness to the roomKeep some liveness to the room Need enough diffusion surface to “smooth out” the soundfieldNeed enough diffusion surface to “smooth out” the soundfield Balance diffusion and absorptionBalance diffusion and absorption Keep some liveness to the roomKeep some liveness to the room Need enough diffusion surface to “smooth out” the soundfieldNeed enough diffusion surface to “smooth out” the soundfield

16. Flutter Echoes Copyright 2003 PMI, Ltd.

17. Flutter Echoes Echoes areEchoes are – Repeated reflections between two parallel surfaces Slap echoes causeSlap echoes cause – Degradation of soundtrack clarity and soundstaging – Bright, “zingy” sound Loudspeaker Listener Copyright 2003 PMI, Ltd.

18. Solutions to Echoes Materials AbsorptiveAbsorptive – CinePanel Absorbers DiffusiveDiffusive – CinePanel Diffusers Loudspeaker Listener Absorptive Material Diffuser

19. Reverberation “Early Decay” Copyright 2003 PMI, Ltd.

20. ReverberationReverberation Reverberation is the result of multiple reflectionsReverberation is the result of multiple reflections Reverb level and time length have to be just rightReverb level and time length have to be just right

21. Copyright 2003 PMI, Ltd. Reverberation Guidelines Research shows that most people like the same range of reverb timeResearch shows that most people like the same range of reverb time Decay time should be.2 to.4 secondsDecay time should be.2 to.4 seconds T m = 0.3 (V/3532) 1/3  15% where V=room volume in ft 3T m = 0.3 (V/3532) 1/3  15% where V=room volume in ft 3 Research shows that most people like the same range of reverb timeResearch shows that most people like the same range of reverb time Decay time should be.2 to.4 secondsDecay time should be.2 to.4 seconds T m = 0.3 (V/3532) 1/3  15% where V=room volume in ft 3T m = 0.3 (V/3532) 1/3  15% where V=room volume in ft 3

22. Reverberation Time Optimal Decay Time vs. Room Volume Optimal Decay Time vs. Room Volume Volume (ft 3 ) TimeTime RT60RT60 200020003000300040004000 0.25s0.25s 0.31s0.31s 0.28s0.28s Copyright 2003 PMI, Ltd.

23. Reverberation Time Getting it right Use the right amount of absorptionUse the right amount of absorption Calculate the amount with the Arau- Puchades equationsCalculate the amount with the Arau- Puchades equations – Know the absorption coefficient of materials – Be prepared to do lots of math Use the right amount of absorptionUse the right amount of absorption Calculate the amount with the Arau- Puchades equationsCalculate the amount with the Arau- Puchades equations – Know the absorption coefficient of materials – Be prepared to do lots of math

24. Copyright 2003 PMI, Ltd. Reverberation Time Getting it right – Do the Math The Arau- Puchades equation: Best and latestThe Arau- Puchades equation: Best and latest RT60 = 0.161V -S ln(1-α x ) [ ] x/s 0.161V -S ln(1-α y ) [ ] y/s 0.161V -S ln(1-α z ) [ ]z/sx x V is volume S is total room surface area α is area-weighted averaged absorption coefficient for each wall x is area of Left +Right walls y is area of Front + Rear walls z is area of Floor + Ceiling

25. Copyright 2003 PMI, Ltd. Reverberation Time Getting it right … or simply use the CinePanel room size guidelines… or simply use the CinePanel room size guidelines – We’ve already done the work for you! … or simply use the CinePanel room size guidelines… or simply use the CinePanel room size guidelines – We’ve already done the work for you!

26. Copyright 2003 PMI, Ltd. CinePanel Kit Selections Optimized decay time for each room size Room Size KitAbsorbersDiffusers 180 ft 2 CP5555 200 ft 2 CP6666 300 ft 2 CP7777 400 ft 2 CP8888 500 ft 2 CP9999 600 ft 2 CP10101010

27. Example Layout Copyright 2003 PMI, Ltd.

28. Door with absorber panel 2x4’ Absorptive panel on ceiling CinePanel Diffuser CinePanel Absorber Example Treatment Layout CinePanel CP88P in 400 ft 2 room Optional absorptive panel behind Microperf screen Asymmetrical placements prevent Flutter Echoes between diffusers

29. Copyright 2003 PMI, Ltd. CinePanel ® The Product Line

30. Copyright 2003 PMI, Ltd. The CinePanel Building Block Absorber-Diffuser panel pairAbsorber-Diffuser panel pair Each panel is 2’x4’Each panel is 2’x4’ Absorber-Diffuser panel pairAbsorber-Diffuser panel pair Each panel is 2’x4’Each panel is 2’x4’

31. Copyright 2003 PMI, Ltd. The CinePanel Building Block Wedge-shaped panelsWedge-shaped panels Taper from 2” to 4½ ”Taper from 2” to 4½ ” Benefit: wider response without the visual bulkBenefit: wider response without the visual bulk Wedge-shaped panelsWedge-shaped panels Taper from 2” to 4½ ”Taper from 2” to 4½ ” Benefit: wider response without the visual bulkBenefit: wider response without the visual bulk

32. Copyright 2003 PMI, Ltd. The CinePanel Building Block Absorber and diffuser Panels look identicalAbsorber and diffuser Panels look identical Cores are differentCores are different Absorber is dense mineral wool in fiberglass sheathAbsorber is dense mineral wool in fiberglass sheath Absorber and diffuser Panels look identicalAbsorber and diffuser Panels look identical Cores are differentCores are different Absorber is dense mineral wool in fiberglass sheathAbsorber is dense mineral wool in fiberglass sheath

33. Copyright 2003 PMI, Ltd. The CinePanel Diffuser Linear wellsLinear wells Different depths for broader frequency rangeDifferent depths for broader frequency range Low resonance PolyethyleneLow resonance Polyethylene Linear wellsLinear wells Different depths for broader frequency rangeDifferent depths for broader frequency range Low resonance PolyethyleneLow resonance Polyethylene

34. Copyright 2003 PMI, Ltd. Fabric Color Choices Guilford FR701 FabricGuilford FR701 Fabric 48 Color choices48 Color choices Guilford FR701 FabricGuilford FR701 Fabric 48 Color choices48 Color choices

35. Copyright 2003 PMI, Ltd. Installation Clips for Diffusers ClipsClips V-Bar affixed to wallV-Bar affixed to wall ClipsClips V-Bar affixed to wallV-Bar affixed to wall

36. Copyright 2003 PMI, Ltd. Installation Clips for Absorbers Z-ClipsZ-Clips V-Bar affixed to wallV-Bar affixed to wall Z-ClipsZ-Clips V-Bar affixed to wallV-Bar affixed to wall

37. Copyright 2003 PMI, Ltd. InstallationInstallation Panel hangs from clip barPanel hangs from clip bar Easy to install and removeEasy to install and remove Panel hangs from clip barPanel hangs from clip bar Easy to install and removeEasy to install and remove

38. Copyright 2003 PMI, Ltd. Place absorbers and diffusers 2 ft up from floorPlace absorbers and diffusers 2 ft up from floor Installation Hanging the Panels

39. Copyright 2003 PMI, Ltd. Place low voltage halogens on top of panel pairPlace low voltage halogens on top of panel pair Increases architectural functionIncreases architectural function Place low voltage halogens on top of panel pairPlace low voltage halogens on top of panel pair Increases architectural functionIncreases architectural function Lighting Option

40. CinePanel Room in Gray Copyright 2003 PMI, Ltd.

41. CinePanel Room in Blue Copyright 2003 PMI, Ltd.

42. CinePanel Room in Red Copyright 2003 PMI, Ltd.

43. CinePanel Kit Prices Room Size KitRetail <180 ft 2 CP22$1300 180 ft 2 CP55$3,200 200 ft 2 CP66$3,700 300 ft 2 CP77$4,300 400 ft 2 CP88$4,800 500 ft 2 CP99$5,500 600 ft 2 CP1010$6,100

44. Copyright 2003 PMI, Ltd. CinePanel “Plus” Kit Prices Room Size KitRetail <180 ft 2 CP22P$1,600 180 ft 2 CP55P$3,500 200 ft 2 CP66P$4,100 300 ft 2 CP77P$4,600 400 ft 2 CP88P$5,500 500 ft 2 CP99P$6,200 600 ft 2 CP1010P$6,800

45. Copyright 2003 PMI, Ltd. CinePanel Press Coverage Phenomenal !Phenomenal ! Home Theater Nov 2002Home Theater Nov 2002 Home Theater May 2003Home Theater May 2003 Sound and Vision May 2003, page 26Sound and Vision May 2003, page 26 Widescreen Review Issue 70, Page 25Widescreen Review Issue 70, Page 25 Cinema Chez Soi (France) November 2002Cinema Chez Soi (France) November 2002 Inside Track, Aug 28, 2003Inside Track, Aug 28, 2003 Phenomenal !Phenomenal ! Home Theater Nov 2002Home Theater Nov 2002 Home Theater May 2003Home Theater May 2003 Sound and Vision May 2003, page 26Sound and Vision May 2003, page 26 Widescreen Review Issue 70, Page 25Widescreen Review Issue 70, Page 25 Cinema Chez Soi (France) November 2002Cinema Chez Soi (France) November 2002 Inside Track, Aug 28, 2003Inside Track, Aug 28, 2003

46. Copyright 2003 PMI, Ltd. SummarySummary Room acoustics affect any audio systemRoom acoustics affect any audio system With basic science and care you can tame room acousticsWith basic science and care you can tame room acoustics CinePanel is the simple answer!CinePanel is the simple answer! Room acoustics affect any audio systemRoom acoustics affect any audio system With basic science and care you can tame room acousticsWith basic science and care you can tame room acoustics CinePanel is the simple answer!CinePanel is the simple answer!