What is Acoustics@home?

Acoustics@home is a BOINC-based volunteer computing project aimed at solving inverse problems in underwater acoustics. You can contribute to our research by running a free program on your computer.

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In underwater acoustics the notion of geoacoustic inversion refers to a collection of techniques that can be used for the reconstruction of medium parameters. The medium parameters are usually understood as the sound speed profile in water (i.e., the dependence of the sound speed on the depth) and the sound speed and density in the sea bottom sediment layers. Medium parameters reconstruction is of great importance for problems of underwater communication and for the development of underwater navigation systems.

While normally measurements for the geoacoustic inversion are performed using expensive receiver arrays, recently it was shown that single-hydrophone recording of a broadband pulse signal can be also successfully used for estimating the medium parameters.

The method of geoacoustic inversion developed in our study is based on using modal dispersion data. Waveguide dispersion is usually induced by the difference in group velocities of propagation of normal waves of different mode numbers at different frequencies. By using special algorithms of the frequency-time analysis of signals, it is possible to filter out the modal components of a pulse signal from its time series recorded by a single hydrophone. The implementation of this method in practice can be thought of as a solution of an optimization problem in a (very large) discrete search space, and every evaluation of the cost function requires numerous solutions of an acoustic spectral problem. Thus, the whole computational burden can be easily divided into a large number of relatively simple independent tasks, which can be solved using volunteer computing.

News

Server maintenance

29 Jan 2019, 10:52:56 UTC
During 2 weeks (Jan 30 - Feb 12) the server can be temporarily unavailable because of the maintenence.

Ближайшие 2 недели (с 30 января по 13 февраля) сервер может быть временно недоступен из-за технических работ.

Paper in the proceedings of GRID'2018

21 Jan 2019, 19:40:10 UTC
A new paper has been published: 'Oleg Zaikin, Pavel Petrov and Ilya Kurochkin. Application of BOINC-based volunteer computing for comparison of the geoacoustic inversion algorithms efficiency // Selected Papers of the 8th International Conference on Distributed Computing and Grid-technologies in Science and Education. CEUR-WS. 2018. Vol. 2267. pp. 298-301'
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