File:Acoustic room de-reverberation using time-reversal acoustics (IA acousticroomdere1094513698).pdf
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[edit]Acoustic room de-reverberation using time-reversal acoustics
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| Title |
Acoustic room de-reverberation using time-reversal acoustics |
| Publisher |
Monterey, California: Naval Postgraduate School |
| Description |
This thesis probes the performance of one-channel time-reversal acoustics in a chamber in terms of the geometry of the cavity. In particular, a rectangular chamber is compared to an enclosure that has a stadium shape. The mode structure in the rectangular cavity is highly symmetric, while it is highly irregular in the stadium-shaped cavity. Time- reversal acoustic techniques produce an improved focus in the latter. The focusing quality is determined as a function of frequency, time-reversal window size, and spatial extent. A scheme for encrypted acoustic communication, both in air and underwater, that uses multiple broadband signals with identical bandwidth, Hanning window source spectra, and center frequencies separated by half the bandwidth, allowing for null detection between adjacent signals, is successfully investigated. Subjects: |
| Language | English |
| Publication date | September 1999 |
| Current location |
IA Collections: navalpostgraduateschoollibrary; fedlink |
| Accession number |
acousticroomdere1094513698 |
| Source | |
| Permission (Reusing this file) |
Approved for public release, distribution unlimited. |
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
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| current | 22:39, 13 July 2020 |  | 1,275 × 1,650, 64 pages (2.28 MB) | Fæ (talk | contribs) | FEDLINK - United States Federal Collection acousticroomdere1094513698 (User talk:Fæ/IA books#Fork8) (batch 1993-2020 #5353) |
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