Master's Papers and Projects
Permanent URI for this collection
Browse
Browsing Master's Papers and Projects by Content Type "Thesis"
Now showing 1 - 4 of 4
Results Per Page
Sort Options
- Auragami: Unfolding Stereo Audio for High-Density Loudspeaker ArraysUpthegrove, John Tanner (2019-05-14)As a critical complement to immersive music, especially in virtual and augmented reality, demand for high-density loudspeaker arrays (HDLAs), consisting of 24 or more individually addressable loudspeakers is increasing. With only a few dozen publicly accessible systems around the world, HDLAs are rare, necessitating artistic and technical exploration. The work presented in this thesis details the culmination of four years of aesthetic and technical practice in composition and sound design for high-density loudspeaker arrays as an attempt to solidify existing standards and posit new practices. technical achievements include a pipeline to create repeatable and portable spatial audio mixes across arbitrary loudspeaker arrays, rapid spatial sound prototyping, and digital audio workstation workflow for 3-D soundscape creation. Aesthetic explorations have resulted in a distinct compositional voice, utilizing spatial audio systems as an instrument. Compositions specific to one venue may take advantage of the unique characteristics of a venue, such as loudspeaker layout, loudspeaker quantity, and room acoustics. The detailed graduate projects from 2015 to 2019 exemplify technical and compositional achievements in the exploration of the potential for HDLAs.
- Frequency response of a feed preheaterJanis, Rudolph Francis (Virginia Polytechnic Institute, 1962)The purpose of this investigation was to measure the frequency response of a shell and tube heat exchanger when the input is the pressure to the steam valve and the output is the feed temperature. During this investigation the frequency response of the feed flow loop was also determined. Controller settings were determined for the feed rate controller. The heat-exchanger under investigation was the food preheater connected to the ten place, bubble-cap, distillation column located in the Unit Operations Laboratory, Department of Chemical Engineering, Virginia Polytechnic Institute. This heat-exchanger was a single-pass, shell and tube type having a contact surface of nineteen 5/8-inch copper tubes 45.5 inches long. The flow rate during the investigation of temperature and pressure frequency response was maintained at 3.70 gallons per minute. The feed mixture was composed of benzene, n-hepane, xylene, and toluene. Frequency response tests were conducted on the steam pressure and hydrocarbon temperature to upsets in steam flow rates. Two tests were conducted on each the temperature and pressure. The first test was conducted at a mean temperature of 161°F and the second at 194°F. The frequency range for each of these tests was 0.008 - 0.05 cycles per second. The ultimate frequency of the hydrocarbon temperature to steam flow upsets was determined to be 0.021 cycles per second. Frequency response test performed on the feed flow loop was conducted at a mean hydrocarbon flow rate of 2.75 gallons per minute and room temperature. A fifteen percent disturbance was used and the unit was tested over the frequency range of 0.008 - 0.6 cycles per second. The zero frequency gain of the feed flow loop was found to be 2.10. The ultimate frequency for upsets in flow was determined to be 0.53 cycles per second. The controller settings determined for the two mode controller which controlled the hydrocarbon flow were, proportional band of 63.5 percent and reset of 0.262 minutes.
- A report of an investigation of a portion of Strouble's Creek, near Blacksburg, Montgomery County, VirginiaFowle, Bernard H. (Virginia Agricultural and Mechanical College and Polytechnic Institute, 1913)A report of an investigation of a portion of Strouble’s Creek, near Blacksburg, Montgomery County, Virginia, for the purpose of locating a reservoir to serve as a source of ice supply for the Virginia Polytechnic Institute, as a skating pond for the cadets of the Institute and as a possible source of water supply for the Tuberculosis Barns of the Virginia Agricultural Experiment Station, located nearby. This report will include a study of the topography of the portion of trouble's Creek Valley involved, of the water flow conditions of this stream, of complete designs for a Hollow Deck and Buttress Type of Reinforced Concrete Dam, and cost estimates on the proposition. This report will be accompanied by a complete topographic map of the area involved, the field notes, and complete plans for the Hollow Deck and Buttress Type of Dam decided on, save that the 36" pipe and control valve for the drainage of the reservoir are not shown.
- A study of the self-purification of Strouble's CreekSutton, Lee Edwards (Virginia Agricultural and Mechanical College and Polytechnic Institute, 1914)