Acoustics in Green Buildings

Transcription

1 Acoustics in Green Buildings Dr. Kenneth P. Roy, fellow ASA Sr. Principal Research Scientist Armstrong Building Products Technology, R&D Lancaster, PA, USA

2 Buildings and People Architecture - Mission - - Society -

3 Buildings and People Architecture - Mission - - Society - Offices work I spaces we spaces Healthcare heal healing spaces safety Schools learn learning spaces teaching

4 Buildings and People Architecture - Mission - Offices work I spaces we spaces Healthcare heal healing spaces safety Schools learn learning spaces teaching Buildings are for People we design we build we operate Indoor Activities we communicate we concentrate we rest Indoor Environmental Quality Acoustic Comfort (primary) Visual Comfort (primary) Thermal Comfort (enabling) IAQ (enabling)

5 Buildings and People Architecture - Mission - Offices work I spaces we spaces Healthcare heal healing spaces safety Schools learn learning spaces teaching - Society - Air Water Material Resources Energy

6 Office Bldgs GOAL: To provide a space that is both healthy and productive for the occupants, while also being both energy efficient and sustainable

7 Office Bldgs Cost of doing business (2012) People Are The Most Significant Investment 90% is spent on people Source: 1. Cited in Browning B. (2012) The Economics of Biophilia: Why designing with nature in mind makes sense. Available: Economics-of-Biophilia_Terrapin-Bright-Green-2012e_1.pdf Last accessed 12 August 2014

8 Drivers of Change

9 Drivers of Change USA Office Buildings Post Occupancy Evaluation

10 Drivers of Change USA Office Buildings Post Occupancy Evaluation

11 Drivers of Change USA & Australia Office Buildings Post Occupancy Evaluation

12 * LEED = required & credits LEED Schools

13 India Green Bldgs

14 India Green Bldgs Schools no reference for Acoustic Comfort

15 India Green Bldgs Schools Acoustic Comfort should meet noise criteria Igatpuri, India 2012

16 China Green Campus GB Code for design of schools Allowed environmental noise level for teaching buildings should meet the relevant requirements of existing national standard GB50118 Code for design of sound insulation of civil buildings Reverberation time for teaching buildings should meet the relevant requirements of existing national standard GB50118 Code for design of sound insulation of civil buildings.

17 China Green Campus GB Code for design of sound insulation of civil buildings, issued by MOHURD Background Noise Requirement: section p 11 Space Normal classroom, Instrument classroom, Music classroom Maximum background noise level, dba 45 Reverberation Time Requirement: section p 14 Space Volume(m 3, ft 3 ) Normal classroom Maximum RT for mid band frequencies of 500 and 1000 HZ (s) 200, >200, Speech and Multimedia classroom 300, > 300,

18 Elementary and Middle School Star Ratings China Green Campus

19 China Green Campus Design Knowledge Evidence Based Design First Affiliated Primary School of Fuzhou Education College, located at Fuzhou, Fujian Province

20 China Green Campus Subjective Questionnaire Student survey Results Fuzhou School 13. Compared with non-refurbished room, are there any differences of the noise from following places in the refurbished room? Reduced No Change Increased Echo in the room 77.2% Echo in the room 17.5% Echo in the room 5.3% Playground 75.4% Playground 24.6% Playground Corridor 73.7% Corridor 21.1% Corridor 5.3% Pupil around me 71.9% Pupil around me 24.6% Pupil around me 3.5% Equipments in the room 68.4% Equipments in the room 31.6% Equipments in the room Outside school/street 64.9% Outside school/street 33.3% Outside school/street 1.8% Neighbouring classroom 63.2% Neighbouring classroom 26.3% Neighbouring classroom 10.5% Good Neutral Bad -Total 57 valid pupils questionnaires for Part B. 20

21 China Green Campus Design Knowledge Evidence Based Design Subjective Questionnaire Student survey Results Fuzhou School 9. Which classroom do you prefer to study in, refurbished or non-refurbished? Note: Non refurbished = Standard Room A, Refurbished = Enhanced Room B

22 Drivers of Change IEQ Acoustic Comfort Knowledge Understanding Enlightenment For Speech to be Intelligible to the Students we must: 1. Design for Sound Clarity w/ Architecture & Acoustics 2. Protect Sound Clarity w/ low noise Mechanical Design 3. Consider Environmental & Activity noise