@article{4b59f030ae8e4b6283d8e492901a9657,
title = "Acoustic centering of sources measured by surrounding spherical microphone arrays",
abstract = "The radiation patterns of acoustic sources have great significance in a wide range of applications, such as measuring the directivity of loudspeakers and investigating the radiation of musical instruments for auralization. Recently, surrounding spherical microphone arrays have been studied for sound field analysis, facilitating measurement of the pressure around a sphere and the computation of the spherical harmonics spectrum of the sound source. However, the sound radiation pattern may be affected by the location of the source inside the microphone array, which is an undesirable property when aiming to characterize source radiation in a unique manner. This paper presents a theoretical analysis of the spherical harmonics spectrum of spatially translated sources and defines four measures for the misalignment of the acoustic center of a radiating source. Optimization is used to promote optimal alignment based on the proposed measures and the errors caused by numerical and array-order limitations are investigated. This methodology is examined using both simulated and experimental data in order to investigate the performance and limitations of the different alignment methods.",
author = "{Ben Hagai}, Ilan and Martin Pollow and Michael Vorlnder and Boaz Rafaely",
note = "Funding Information: Henderson{\textquoteright}s personal and collaborative research accomplishments alone would be ample for most investigators; however, he managed a superlative encore in the form of the Extramural Grant Program (EGP) after he took on the research administrative responsibility in Baxter Corporation. To put this program in context, we need to return to the late 1980s and early 1990s, when funding from the NIH, especially for chronic renal failure and dialysis research, was restricted. That was a difficult era for the NIH, after nearly a decade of government down-sizing and before the legislature decided that medical research was a high priority for federal spending. The NIH was trying to maintain existing programs, but there were insufficient funds to support new initiatives or young investigators. Into this breach came the EGP, which for nearly a decade, and long after the NIH drought eased, provided research dollars to worthwhile investigative initiatives in Nephrology. Research proposals for the EGP were reviewed by an independent board of reputable nephrologists and biomedical engineers. The review process of the EGP was impartial and noncommercial. The criterion for funding was scientific excellence. The result of the program was impressive. Through one decade after its initiation, the EGP dispersed $25 million for >700 projects in 22 countries, resulting in >700 publications, with an average impact factor of 4.9. The success of the program hinged substantially on Henderson{\textquoteright}s insight, creativity, leadership, and knowledge of the field, personnel, and academic environment.",
year = "2011",
month = oct,
day = "1",
doi = "10.1121/1.3624825",
language = "English",
volume = "130",
pages = "2003--2015",
journal = "Journal of the Acoustical Society of America",
issn = "0001-4966",
publisher = "Acoustical Society of America",
number = "4",
}