Waves in Fluids and Solids
Edited by: Ruben Pico Vila
ISBN 978-953-307-285-2, Hard cover, 314 pages
Publisher: InTech
Publication date: September 2011
Subject: Acoustic Engineering
ISBN 978-953-307-285-2, Hard cover, 314 pages
Publisher: InTech
Publication date: September 2011
Subject: Acoustic Engineering
Acoustics is an discipline that deals with many types of fields wave phenomena. Originally the field of Acoustics was consecrated to the sound, that is, the study of small pressure waves in air detected by the human ear. The scope of this field of physics has been extended to higher and lower frequencies and to higher intensity levels. Moreover, structural vibrations are also included in acoustics as a wave phenomena produced by elastic waves. This book is focused on acoustic waves in fluid media and elastic perturbations in heterogeneous media. Many different systems are analyzed in this book like layered media, solitons, piezoelectric substrates, crystalline systems, granular materials, interface waves, phononic crystals, acoustic levitation and soft media. Numerical methods are also presented as a fourth-order Runge-Kutta method and an inverse scattering method.
Advances in Sound Localization
Edited by: Pawel Strumillo
ISBN 978-953-307-224-1, Hard cover, 590 pages
Publisher: InTech
Publication date: April 2011
Subject: Acoustic Engineering
ISBN 978-953-307-224-1, Hard cover, 590 pages
Publisher: InTech
Publication date: April 2011
Subject: Acoustic Engineering
Sound source localization is an important research field that has attracted researchers’ efforts from many technical and biomedical sciences. Sound source localization (SSL) is defined as the determination of the direction from a receiver, but also includes the distance from it. Because of the wave nature of sound propagation, phenomena such as refraction, diffraction, diffusion, reflection, reverberation and interference occur. The wide spectrum of sound frequencies that range from infrasounds through acoustic sounds to ultrasounds, also introduces difficulties, as different spectrum components have different penetration properties through the medium. Consequently, SSL is a complex computation problem and development of robust sound localization techniques calls for different approaches, including multisensor schemes, null-steering beamforming and time-difference arrival techniques. The book offers a rich source of valuable material on advances on SSL techniques and their applications that should appeal to researches representing diverse engineering and scientific disciplines.
