Angular Resolution of Human Sound Localization
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Sound localization is very important to the acoustic community due to its capacity to replicate audio environments. Surround sound systems, theaters, and audio engineers all use localization techniques to give a listener the sensation that they are hearing realistic sounds. The purpose of this experiment was to design a procedure to test and model the localization accuracy of human hearing in the azimuthal plane. Although more testing needs to be completed to reduce the large error due to lack of a large collection of trials, trends have emerged from the data to show that localization is more accurate in the front than on the sides. Data shows that the variation in localization has approximately 15 degrees of error directly in front and continues to increase to 36 degrees of error at a listener angle of 60 degrees relative to the speaker location. Another trend shows that at extremely high frequencies, localization averages decrease. For frequencies of 300Hz, 1kHz, and 3kHz, localization averages were approximately 20 +/- 4 degrees, but for 10kHz the average was only 15 +/- 1.3 degrees. Based off of these trends a qualitative model and its features have been constructed.
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Carthage College (Carthage College, 1965)A promotional LP sent to prospective students in 1965 after the campus moved to Kenosha. Includes the earliest known copy of the current Alma Mater.