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Engineering Sound CSUF - Meng Concert Hall

Engineering Sound CSUF - Meng Concert Hall. Mark E. Rothermel Principal Rothermel & Associates, LLC Architectural Acoustics Collaborative. Engineering Sound = Architectural Acoustics. Building Acoustic Design to Support the Programmed Uses of the Hall Orchestral Music

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Engineering Sound CSUF - Meng Concert Hall

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  1. Engineering SoundCSUF - Meng Concert Hall Mark E. Rothermel Principal Rothermel & Associates, LLC Architectural Acoustics Collaborative

  2. Engineering Sound = Architectural Acoustics • Building Acoustic Design to Support the Programmed Uses of the Hall • Orchestral Music • Romantic, Classical & Contemporary Chamber Music • Civic Light Opera • Big Band • High School Bands • Opera • Choral Music

  3. Architectural Acoustics • HVAC Noise Control • Quiet Mechanical, Electrical & Plumbing Systems • Sound Isolation • Walls, Roof, Doors & Windows • Room Acoustics • Shaping, Materials, Finishes, Moveable Elements

  4. HVAC Noise Control - Criteria

  5. HVAC Noise Control • Low Noise Levels Achieved Through: • Quiet Equipment Selections • Location of Equipment in Relation to Hall • Duct Routing, Dimensions and Lengths • Slow Airflow Velocities • Smooth Takeoffs and Transitions • Location of Remote Volume Dampers • Silencers and Duct Liner • Diffuser/Grille Selections and Sizes • Vibration Isolation of Mechanical, Electrical and Plumbing Equipment and Piping

  6. HVAC Noise Control

  7. HVAC Noise Control • Pressurized Main Duct • Low Velocity Air Drops from supply air ‘mushrooms’

  8. Sound Isolation • Plan for Sound Isolation • Circulation, Lobby, etc. provide buffer zones

  9. Sound Isolation • Walls • Grout-Filled Concrete Block Walls • Doors • Sound Rated Acoustical Door Assemblies • Gaskets on Standard Doors at Vestibules • Windows • Thick, Multiple Glazing Layers in Airtight Frames • Roof • Concrete on Metal Deck

  10. Sound Isolation • Floors • Isolated, Floated Concrete Floor Slab Over Structural Slab • Grad Slab with Perimeter Isolation Joints • Special Construction • Box-in-Box Construction • Perimeter Isolation Joints • Floated Concrete Slabs • Vibration Isolated Gypsum Board Ceilings

  11. Room Acoustics - Basics • Room Volume • Maximized for Reverberation – 400,000 Cubic Feet • Shaping • All Surfaces Have Specific Angular Orientation, Shape, Radii – Nothing is Arbitrary • Finishes & Materials • Heavy, rigid, stiff surfaces for bass support • Variability • Movable Drapes & Banners • Movable Canopy

  12. Room Acoustics - Reverberation • Retractable Banners and Draperies Vary the Reverberation Time

  13. Room Acoustics - Shaping

  14. Room Acoustics - Shaping

  15. Room Acoustics - Shaping • Balcony Fascia Shaping • Shaped & Articulated, Tight Radius Curves • Highly Sound Diffusive • Counters Focusing of Horseshoe-Shaped Plan

  16. Room Acoustics - Shaping • Doubly-Curved, Moveable Canopy • Ensemble • Attack • Articulation • Clarity

  17. Room Acoustics – Finishes & Materials • Grout-Filled Concrete Block Walls • Concrete on Metal Deck Roof • Rigid Interior Shapes and Surfaces of Heavy Plaster • No Diaphragmatic movement • All to Support Bass Response

  18. Room Acoustics - Variability Acoustic Canopy • Directs Sound Toward Audience • Facilitates Ensemble by Allowing Musicians to Hear One Another • Changes the Direct-to-Reverberant Ratio

  19. Room Acoustics - Variability • Moveable Fabric Banners Change the Reverberation Time (RT60)

  20. Conclusion • Quiet • Allows High Dynamic Range of Music • Isolated • No Distractions To or From Neighbors • Sound • Carefully Defined Interiors

  21. Questions?

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