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A Modified Numerical Approach for Leaky Mode Computation

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Acoustic modelling using normal mode approach is examined in Indian Ocean environment with a soft sediment bottom. Computing leaky modes is critical in modelling the acoustic field in these environments. Normal mode programs KRAKEN and KRAKENC are applied to these environments and their instability in determining some of the leaky modes is pointed out. Rayleigh quotient iteration is proposed in place of inverse iteration in KRAKENC for determining the dominant complex modes. This approach provides better estimate of all the dominant modes and is found to be stable even at higher frequencies.
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Document Type: Research Article

Publication date: 01 September 2017

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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