Multi-source time reversal focusing for airborne sound. (June 2020)

• Record Type: Journal Article
• Authors: Chen, Jianyu; Ma, Fuyin
• Is Part Of: Applied acoustics. Volume 163(2020)
• Publication Date: 2020-06
• Subjects: Multi-source time reversal focusing -- Traditional time reversal focusing -- Multi-group focusing method -- Signal superposition method; Acoustical engineering -- Periodicals; Periodicals; 620.2
• DOI: 10.1016/j.apacoust.2020.107207
• Languages: English
• ISSNs: 0003-682X

Abstract

Abstract: The time-reversal (TR) technique is universally acknowledged as dominant roles in acoustic applications. In this paper, implementation schemes for multi-source TR focusing on airborne sound were systematically investigated. An improved version of the traditional scheme was introduced according to the principle of reciprocity. Variations in multi-source TR focusing based on the improved focusing scheme were proposed, which included the multi-group focusing method and the signal superposition method. Furthermore, the traditional focusing scheme was extended to verify the adaptability of multi-source focusing experimentally. The performance and realization complexity of the three variations were discussed to identify the best scheme. This work extended the TR method from a single source to multi-source situations via the superposition method, which is superior to existing techniques and simplifies the scenarios of multi-source focusing, therefore, promoting acoustic focusing research and application.