Difference between revisions of "Chavin"
From CCRMA Wiki
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=== '''Phase 1. Preparation and on-site measurements ''' === | === '''Phase 1. Preparation and on-site measurements ''' === | ||
| − | + | '''Preparation''' | |
* Preliminary on-site tests [completed 12/07] | * Preliminary on-site tests [completed 12/07] | ||
* Specification of test and recording equipment [completed 1/08] | * Specification of test and recording equipment [completed 1/08] | ||
* Purchase and assemble gear | * Purchase and assemble gear | ||
| − | + | '''Simulation Trials in local environments''' | |
* CCRMA stairwell, hallways, “Pit” | * CCRMA stairwell, hallways, “Pit” | ||
* SU subsurface spaces-“famous” steam tunnels | * SU subsurface spaces-“famous” steam tunnels | ||
* Outdoor space similar to Chavín Circular Plaza? | * Outdoor space similar to Chavín Circular Plaza? | ||
| − | + | '''Specify provisional mapping for sound source-receiver placements from CAD rendering [in progress 1/08] ''' | |
* from each chamber to main space | * from each chamber to main space | ||
* least damaged areas | * least damaged areas | ||
| Line 46: | Line 46: | ||
* peculiar geometries (e.g. , adjoining (comb-like) chambers, etc) | * peculiar geometries (e.g. , adjoining (comb-like) chambers, etc) | ||
| − | + | '''On site measurements at Chavín''' | |
* Plastering of section of Chavín (selection of plastered sections is critical (soon after arrival to allow for drying) | * Plastering of section of Chavín (selection of plastered sections is critical (soon after arrival to allow for drying) | ||
* Adjust mapping of source-receiver points | * Adjust mapping of source-receiver points | ||
| − | + | '''Measurements -- sources''' | |
* balloon pops | * balloon pops | ||
* speaker-generated sinusoidal chirps | * speaker-generated sinusoidal chirps | ||
| Line 56: | Line 56: | ||
* strombus trumpet live/recorded | * strombus trumpet live/recorded | ||
* record stream/water sound, wind noise | * record stream/water sound, wind noise | ||
| − | + | ||
| + | '''Measurements -- receivers''' | ||
* distributed mics | * distributed mics | ||
* in-ear-canal mics | * in-ear-canal mics | ||
| − | + | '''Costs''' | |
* $5000 equipment (link to gear and price list) | * $5000 equipment (link to gear and price list) | ||
* $8000 travel and accommodations (2 weeks on site) for 2 faculty (Rick, Abel), 2 graduates students (Huang, Kolar) | * $8000 travel and accommodations (2 weeks on site) for 2 faculty (Rick, Abel), 2 graduates students (Huang, Kolar) | ||
* $1000 on site plastering and removal | * $1000 on site plastering and removal | ||
| − | + | '''Funding''' | |
* National Geographic [http://www.nationalgeographic.com/research/grant_application.html#eligibility] | * National Geographic [http://www.nationalgeographic.com/research/grant_application.html#eligibility] | ||
* SU internal | * SU internal | ||
| Line 72: | Line 73: | ||
=== '''Phase 2. Analysis and Generation of Physical Model ''' === | === '''Phase 2. Analysis and Generation of Physical Model ''' === | ||
| − | + | '''Analysis''' | |
* compare plastered and unplastered and extrapolate to the entire structure | * compare plastered and unplastered and extrapolate to the entire structure | ||
* IR measurement to render the modeled spaces | * IR measurement to render the modeled spaces | ||
| Line 78: | Line 79: | ||
* Strombus trumpet | * Strombus trumpet | ||
| − | + | '''Physical Model''' | |
* calculate acoustical properties of materials | * calculate acoustical properties of materials | ||
* rendering from architectural models | * rendering from architectural models | ||
| Line 85: | Line 86: | ||
* process and match/fit measurements then extend to parts of site that aren't necessarily intact or accessible for comprehensive measurements (plastering). | * process and match/fit measurements then extend to parts of site that aren't necessarily intact or accessible for comprehensive measurements (plastering). | ||
| − | + | '''Costs''' | |
| − | + | '''Funding Sources''' | |
* National Geographic [http://www.nationalgeographic.com/research/grant_application.html#eligibility] | * National Geographic [http://www.nationalgeographic.com/research/grant_application.html#eligibility] | ||
* National Endowment for the Humanities- Collaborative Research Grants [http://www.neh.gov/GRANTS/guidelines/collaborative.html#submit] | * National Endowment for the Humanities- Collaborative Research Grants [http://www.neh.gov/GRANTS/guidelines/collaborative.html#submit] | ||
| Line 95: | Line 96: | ||
=== '''Phase 3. Electroacoustic simulation & Public interface''' === | === '''Phase 3. Electroacoustic simulation & Public interface''' === | ||
| − | + | '''Locations''' | |
* Stanford | * Stanford | ||
* Chavín Museum | * Chavín Museum | ||
| Line 102: | Line 103: | ||
* National Museum Peru | * National Museum Peru | ||
| − | + | '''Equipment''' | |
| − | + | '''Public interface''' | |
* virtual walkthrough (headphone tour) in present condition | * virtual walkthrough (headphone tour) in present condition | ||
* virtual walkthrough (headphone tour) in reconstructed condition | * virtual walkthrough (headphone tour) in reconstructed condition | ||
* enhanced reverberation system for visitor experience | * enhanced reverberation system for visitor experience | ||
* installations of replica in various formats (online, DVD, museum, show, etc.) | * installations of replica in various formats (online, DVD, museum, show, etc.) | ||
Revision as of 16:05, 7 January 2008
Chavín de Huántar Archaeological Acoustics Project
Acoustic Measurement, Archiving, Analysis and Modeling, and Simulation/Installation
Team Information
Co-investigators:
- John Rick, PhD, Professor, Stanford University, Archaeology/Anthropology
- Julius O. Smith, PhD, Professor, Stanford University, Center for Computer Research in Music and Acoustics (CCRMA)/Electrical Engineering (by courtesy)
- Jonathan S. Abel, PhD, Consulting Professor, Stanford University, CCRMA
- Patty Huang, MA, Graduate Student, Stanford University, CCRMA
- Miriam Kolar, MFA, Graduate Student, Stanford University, CCRMA
Coordinator:
- John Chowning, DMA, Professor Emeritus, Stanford University, CCRMA/Music
Local collaborators:
- (Museum director)
Team Background:
- John Rick has been heading excavations and directing research at the Chavín site since 1995
- Digital waveguide techniques were pioneered at CCRMA by Julius O. Smith III
- Julius O. Smith and Jonathan S. Abel have been working together on acoustic array processing and related problems since 1985
- Patty Huang is a 4th year graduate student working under Abel on physical modeling of reverberant spaces
- Miriam Kolar is a 2nd year graduate student with extensive field experience in recording engineering
- John Chowning is a composer having long standing interest in spatial modeling
- CCRMA has expertise in field measurements, psychoacoustics, digital signal processing, and artificial reverberation
Phase 1. Preparation and on-site measurements
Preparation
- Preliminary on-site tests [completed 12/07]
- Specification of test and recording equipment [completed 1/08]
- Purchase and assemble gear
Simulation Trials in local environments
- CCRMA stairwell, hallways, “Pit”
- SU subsurface spaces-“famous” steam tunnels
- Outdoor space similar to Chavín Circular Plaza?
Specify provisional mapping for sound source-receiver placements from CAD rendering [in progress 1/08]
- from each chamber to main space
- least damaged areas
- with and without plastering
- peculiar geometries (e.g. , adjoining (comb-like) chambers, etc)
On site measurements at Chavín
- Plastering of section of Chavín (selection of plastered sections is critical (soon after arrival to allow for drying)
- Adjust mapping of source-receiver points
Measurements -- sources
- balloon pops
- speaker-generated sinusoidal chirps
- other signals
- strombus trumpet live/recorded
- record stream/water sound, wind noise
Measurements -- receivers
- distributed mics
- in-ear-canal mics
Costs
- $5000 equipment (link to gear and price list)
- $8000 travel and accommodations (2 weeks on site) for 2 faculty (Rick, Abel), 2 graduates students (Huang, Kolar)
- $1000 on site plastering and removal
Funding
- National Geographic [1]
- SU internal
Phase 2. Analysis and Generation of Physical Model
Analysis
- compare plastered and unplastered and extrapolate to the entire structure
- IR measurement to render the modeled spaces
- measurement processing to model the pristine state
- Strombus trumpet
Physical Model
- calculate acoustical properties of materials
- rendering from architectural models
- use waveguide mesh processing
- Stanford invention of and current work with waveguide mesh allows effective method to address computation/simulation of acoustical spaces
- process and match/fit measurements then extend to parts of site that aren't necessarily intact or accessible for comprehensive measurements (plastering).
Costs
Funding Sources
Phase 3. Electroacoustic simulation & Public interface
Locations
- Stanford
- Chavín Museum
- Quantify and compensate for support structures
- Simulation of plastered walls
- National Museum Peru
Equipment
Public interface
- virtual walkthrough (headphone tour) in present condition
- virtual walkthrough (headphone tour) in reconstructed condition
- enhanced reverberation system for visitor experience
- installations of replica in various formats (online, DVD, museum, show, etc.)
