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Articles 1 - 3 of 3
Full-Text Articles in Architecture
How Acoustics In California High Performance Schools Relate To Student Achievement, Devin K. Wong
How Acoustics In California High Performance Schools Relate To Student Achievement, Devin K. Wong
Durham School of Architectural Engineering and Construction: Dissertations, Thesis, and Student Research
This research project seeks to determine if students attending K-12 schools meeting a minimum standard of high performance classroom conditions in the state of California do evidence higher scholastic achievement, based on publically available results on state-wide standardized tests. In three phases, a subset of 200+ schools applying for grants dedicated to building high performance schools over the past decade was correlated with an existing database of achievement scores for all public schools in California. The criteria utilized to specify high performance classrooms was provided by the California High Performance Initiative (HPI) Grant program. Academic achievement was evaluated on a …
Design And Optimization Of Membrane-Type Acoustic Metamaterials, Matthew G. Blevins
Design And Optimization Of Membrane-Type Acoustic Metamaterials, Matthew G. Blevins
Durham School of Architectural Engineering and Construction: Dissertations, Thesis, and Student Research
One of the most common problems in noise control is the attenuation of low frequency noise. Typical solutions require barriers with high density and/or thickness. Membrane-type acoustic metamaterials are a novel type of engineered material capable of high low-frequency transmission loss despite their small thickness and light weight. These materials are ideally suited to applications with strict size and weight limitations such as aircraft, automobiles, and buildings. The transmission loss profile can be manipulated by changing the micro-level substructure, stacking multiple unit cells, or by creating multi-celled arrays. To date, analysis has focused primarily on experimental studies in plane-wave tubes …
Quantification Of Time Varying Directivity Of Musical Instruments, Madeline A. Davidson
Quantification Of Time Varying Directivity Of Musical Instruments, Madeline A. Davidson
Durham School of Architectural Engineering and Construction: Dissertations, Thesis, and Student Research
Static directivity patterns of musical instruments have been mapped somewhat extensively, but little research has been done in analyzing the directivity patterns of musical instruments over time as they play. Directivity patterns can be affected by variables such as instrument, frequency, dynamics, and style. This thesis proposes a set of quantification methods of time varying directivity, all derived from the maximum Directivity Index analyzed at consecutive short-duration time windows comprising the musical excerpt. The instrumental recordings used in this paper are taken in an anechoic chamber using either a 5, 13, or 32 multichannel setup. From the values of maximum …