Abstract

A high-resolution directivity measurement system at Brigham Young University has been renovated and upgraded. Acoustical treatments have been installed on the microphone array, professional-grade audio hardware and cabling have been utilized, and user-friendly MATLAB processing and plotting codes have been developed. The directivities of 16 played musical instruments and several loudspeakers have been measured by the system, processed, and plotted. Using loudspeakers as simulated musicians, a comprehensive analysis was completed to validate the system and understand its error bounds. A comparison and evaluation of repeated-capture to single-capture spherical systems was made to demonstrate the high level of detail provided by the 5 degree resolution system. Analysis is undertaken to determine how nonanechoic effects in anechoic chambers influence results. An overview of directivity measurement systems from the literature is provided as well as a dedicated discussion of the directivity measurement system at Brigham Young University.

Degree

MS

College and Department

Physical and Mathematical Sciences; Physics and Astronomy

Rights

http://lib.byu.edu/about/copyright/

Date Submitted

2016-03-01

Document Type

Thesis

Handle

http://hdl.lib.byu.edu/1877/etd8429

Keywords

musical instrument, acoustic directivity, directivity measurement system, anechoic chamber

Dodecahedron.zip (28674 kB)
Horn.zip (75393 kB)
JBL.zip (58213 kB)
Mackie.zip (401512 kB)
Sphere.zip (31572 kB)
Tannoy.zip (60834 kB)
Baritone Saxophone.zip (8444 kB)
Bass Clarinet.zip (1472 kB)
Bass.zip (1223 kB)
Bassoon.zip (34694 kB)
Cello.zip (2841 kB)
Clarinet.zip (4779 kB)
Euphonium.zip (1389 kB)
Flute.zip (94424 kB)
French Horn.zip (6473 kB)
Oboe.zip (2025 kB)
Tenor Saxophone.zip (2317 kB)
Trombone.zip (6894 kB)
Trumpet.zip (2433 kB)
Tuba.zip (1956 kB)
Viola.zip (1642 kB)
Violin.zip (1649 kB)

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