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- W2079013155 abstract "Systems for the active control of acoustic noise (ANC) rely on measurements of the noise signal in order to produce the required “quiet zone.” Soft microphones (SM) are a virtual microphone alternative already proposed by the authors, employing estimates rather than measurements of the noise signal obtained from room impulse responses based on measurements. Therefore, a single microphone can be used to estimate the noise signal at multiple points. This has already been successfully applied on single microphone noise mapping. In the present work, the SM method is evaluated on a real time local ANC system. The proposed scheme is a filtered-s least mean square (FXLMS) based control structure, incorporating SM. Following the proposed system design-simulation with Matlab-Simulink, a three-dimensional enclosure (office-simulating) and a real electroacoustic ANC system based on a TI® TMS320C6713 DSP, developed for this purpose, were built in the laboratory to carry out the experiments. Different options of estimating the SM signals and exploiting them into the control structure are experimentally evaluated as to their ability to enlarge the silence zone and their noise reduction performance around the listener ear zone (using a head and torso simulator) and compared to the standard FXLMS solution." @default.
- W2079013155 created "2016-06-24" @default.
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- W2079013155 date "2008-05-01" @default.
- W2079013155 modified "2023-10-17" @default.
- W2079013155 title "Real time evaluation of soft microphones on a local active noise control system" @default.
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- W2079013155 doi "https://doi.org/10.1121/1.2935563" @default.
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