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| = Chavín de Huántar Archaeological Acoustics Project = | | = [http://ccrma.stanford.edu/groups/chavin/ Chavín de Huántar Archaeological Acoustics Project] = |
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| =='''Acoustic Measurement, Archiving, Analysis and Modeling, and Simulation/Installation'''== | | =='''Acoustic Measurement, Archiving, Analysis, Modeling, and Simulation/Installation''' – A collaboration between Stanford University's Center for Computer Research in Music and Acoustics (CCRMA) and Archaeology/Anthropology == |
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| === '''Team Information''' ===
| | Project website now at: [http://ccrma.stanford.edu/groups/chavin/ ccrma.stanford.edu/groups/chavin/ ] |
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| '''Co-investigators:'''
| | [[Category:Projects]] |
| * John Rick, PhD, Professor, Stanford University, Archaeology/Anthropology
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| * Julius O. Smith, PhD, Professor, Stanford University, Center for Computer Research in Music and Acoustics (CCRMA)/Electrical Engineering (by courtesy)
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| * Jonathan S. Abel, PhD, Consulting Professor, Stanford University, CCRMA
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| * Patty Huang, MA, Graduate Student, Stanford University, CCRMA
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| * Miriam Kolar, MFA, Graduate Student, Stanford University, CCRMA
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| '''Coordinator:'''
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| * John Chowning, DMA, Professor Emeritus, Stanford University, CCRMA/Music
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| '''Local collaborators:'''
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| * (Museum director)
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| '''Team Background:'''
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| * John Rick has been heading excavations and directing research at the Chavín site since 1995
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| * Digital waveguide techniques were pioneered at CCRMA by Julius O. Smith III
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| * Julius O. Smith and Jonathan S. Abel have been working together on acoustic array processing and related problems since 1985
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| * Patty Huang is a 4th year graduate student working under Abel on physical modeling of reverberant spaces
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| * Miriam Kolar is a 2nd year graduate student with extensive field experience in recording engineering
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| * John Chowning is a composer having long standing interest in spatial modeling
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| * CCRMA has expertise in field measurements, psychoacoustics, digital signal processing, and artificial reverberation
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| === '''Phase 1. Preparation and on-site measurements ''' ===
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| '''Preparation'''
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| * Preliminary on-site tests [completed 12/07]
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| * Specification of test and recording equipment [completed 1/08]
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| * Purchase and assemble gear
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| '''Simulation Trials in local environments'''
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| * CCRMA stairwell, hallways, “Pit”
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| * SU subsurface spaces-“famous” steam tunnels
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| * Outdoor space similar to Chavín Circular Plaza?
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| '''Specify provisional mapping for sound source-receiver placements from CAD rendering [in progress 1/08] '''
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| * from each chamber to main space
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| * least damaged areas
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| * with and without plastering
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| * peculiar geometries (e.g. , adjoining (comb-like) chambers, etc)
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| '''On site measurements at Chavín'''
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| * Plastering of section of Chavín (selection of plastered sections is critical (soon after arrival to allow for drying)
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| * Adjust mapping of source-receiver points
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| '''Measurements -- sources'''
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| * balloon pops
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| * speaker-generated sinusoidal chirps
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| * other signals
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| * strombus trumpet live/recorded
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| * record stream/water sound, wind noise
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| '''Measurements -- receivers'''
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| * distributed mics
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| * in-ear-canal mics
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| '''Costs'''
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| * $5000 equipment (link to gear and price list)
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| * $8000 travel and accommodations (2 weeks on site) for 2 faculty (Rick, Abel), 2 graduates students (Huang, Kolar)
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| * $1000 on site plastering and removal
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| '''Funding'''
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| * National Geographic [http://www.nationalgeographic.com/research/grant_application.html#eligibility]
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| * Stanford Institute for Creativity in the Arts (SICA) [http://sica.stanford.edu/]
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| === '''Phase 2. Analysis and Generation of Physical Model ''' ===
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| '''Analysis'''
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| * compare plastered and unplastered and extrapolate to the entire structure
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| * IR measurement to render the modeled spaces
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| * measurement processing to model the pristine state
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| * Strombus trumpet
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| '''Physical Model'''
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| * calculate acoustical properties of materials
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| * rendering from architectural models
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| * use waveguide mesh processing
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| * Stanford invention of and current work with waveguide mesh allows effective method to address computation/simulation of acoustical spaces
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| * process and match/fit measurements then extend to parts of site that aren't necessarily intact or accessible for comprehensive measurements (plastering).
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| '''Costs'''
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| '''Funding Sources'''
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| * National Geographic [http://www.nationalgeographic.com/research/grant_application.html#eligibility]
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| * National Endowment for the Humanities- Collaborative Research Grants [http://www.neh.gov/GRANTS/guidelines/collaborative.html#submit]
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| * National Science Foundation- Archaeology and Archaeometry [http://www.nsf.gov/funding/pgm_summ.jsp?pims_id=11690]
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| === '''Phase 3. Electroacoustic simulation & Public interface''' ===
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| '''Locations'''
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| * Stanford
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| * Chavín Museum
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| * Quantify and compensate for support structures
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| * Simulation of plastered walls
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| * National Museum Peru
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| '''Equipment'''
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| '''Public interface'''
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| * virtual walkthrough (headphone tour) in present condition
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| * virtual walkthrough (headphone tour) in reconstructed condition
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| * enhanced reverberation system for visitor experience
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| * installations of replica in various formats (online, DVD, museum, show, etc.)
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