مؤتمر
Dictionary-based Equivalent Source Method for Near-Field Acoustic Holography
| العنوان: | Dictionary-based Equivalent Source Method for Near-Field Acoustic Holography |
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| المؤلفون: | Canclini, Antonio, Varini, Massimo, Antonacci, Fabio, Sarti, Augusto |
| المساهمون: | Canclini, Antonio, Varini, Massimo, Antonacci, Fabio, Sarti, Augusto |
| بيانات النشر: | Institute of Electrical and Electronics Engineers Inc. |
| سنة النشر: | 2017 |
| المجموعة: | RE.PUBLIC@POLIMI - Research Publications at Politecnico di Milano |
| مصطلحات موضوعية: | Equivalent Source Method, Microphone array, Modal Analysi, Near-field acoustic holography, Software, Signal Processing, Electrical and Electronic Engineering |
| الوصف: | In this paper, we propose a modification of the standard Equivalent Source Method (ESM) for Near-Field Acoustic Holography (NAH). As in EMS, we aim at modeling the acoustic pressure radiated from a vibrating object, and its surface velocity, as the joint effect of a set of equivalent sources located within or close to the object itself. The estimation of the equivalent source strengths (weigths) comes from the solution of a highly ill-conditioned problem. Rather than solving this problem in the least-squares sense, we exploit the 3D model of the vibrating object, along with a rough estimate of its physical parameters, to restrict the space of the solutions. More specifically, we make use of Finite Element Analysis for populating a compressed dictionary of possible equivalent source weights. NAH is then approached by seeking a sparse linear combination of the entries of the dictionary. Experiments carried on a public database prove the effectiveness of the proposed technique, especially when the number of available microphones is limited, and in the presence of a significant level of measurement noise. |
| نوع الوثيقة: | conference object |
| اللغة: | English |
| العلاقة: | info:eu-repo/semantics/altIdentifier/isbn/9781509041176; info:eu-repo/semantics/altIdentifier/wos/WOS:000414286200034; ispartofbook:ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings; 2017 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2017; firstpage:166; lastpage:170; numberofpages:5; serie:PROCEEDINGS OF THE . IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING; http://hdl.handle.net/11311/1045162Test; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85023746181 |
| DOI: | 10.1109/ICASSP.2017.7952139 |
| الإتاحة: | https://doi.org/10.1109/ICASSP.2017.7952139Test http://hdl.handle.net/11311/1045162Test |
| حقوق: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.E602B47E |
| قاعدة البيانات: | BASE |
| DOI: | 10.1109/ICASSP.2017.7952139 |
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