The design of a battery-powered, portable headphone active noise control
system with TI TMS320C5416 DSP is described. The preliminary implementation
of the system on a C5416 DSK is also explained. The problems of fixed-point
implementation are described and solutions are proposed. Sign-sign Fx-LMS
algorithm with a dead-zone is introduced and used as the adaptation algorithm.
Effective use of dynamic range to improve the accuracy in filtering operations is
discussed. Details of the designed battery-powered DSP board are given and board
software development process is explained. The DSK system and designed
portable system is compared against two commercially available analog systems
under three different types of noises / composition of tones, drill noise and
propeller plane cabin noise. The results reveal that adaptive system has better
overall performance.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12605429/index.pdf |
| Date | 01 September 2004 |
| Creators | Tokatli, Ahmet |
| Contributors | Ciloglu, Tolga |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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