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modal-window.rst

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Modal Windows

In the time-domain implementation of it is possible to apply different weighting factors to each mode of the driving signals in the circular harmonics domain by changing the conf.modal_window configuration parameter. Using a weighting window that is smoother than the default rectangular window, causes a concentration of energy to fewer loudspeakers.

matlab

conf = SFS_config; conf.dimension = '2.5D'; conf.secondary_sources.number = 16; conf.secondary_sources.geometry = 'circular'; conf.secondary_sources.size = 3; conf.resolution = 300; conf.plot.usedb = true; conf.t0 = 'source'; X = [-2,2]; Y = [-2,2]; Z = 0; conf.modal_window = 'rect'; % default sound_field_imp_nfchoa(X,Y,Z,[0 -1 0],'pw',0,conf); %print_png('sound_field_imp_nfchoa_25d_dB_rect.png'); conf.modal_window = 'max-rE'; sound_field_imp_nfchoa(X,Y,Z,[0 -1 0],'pw',0,conf); %print_png('sound_field_imp_nfchoa_25d_dB_max-rE.png'); conf.modal_window = 'kaiser'; conf.modal_window_parameter = 1.0; sound_field_imp_nfchoa(X,Y,Z,[0 -1 0],'pw',0,conf); %print_png('sound_field_imp_nfchoa_25d_dB_kaiser.png'); conf.modal_window = 'tukey'; conf.modal_window_parameter = 0.5; sound_field_imp_nfchoa(X,Y,Z,[0 -1 0],'pw',0,conf); %print_png('sound_field_imp_nfchoa_25d_dB_tukey.png');

Sound pressure in decibel of a broadband impulse plane wave synthesized by 2.5D using a rectangular window. The plane wave propagates into the direction of (0,-1,0).

Sound pressure in decibel of a broadband impulse plane wave synthesized by 2.5D using a rectangular window. The plane wave propagates into the direction of (0,-1,0).

Sound pressure in decibel of a broadband impulse plane wave synthesized by 2.5D using a max-rE window. The plane wave propagates into the direction of (0,-1,0).

Sound pressure in decibel of a broadband impulse plane wave synthesized by 2.5D using a max-rE window. The plane wave propagates into the direction of (0,-1,0).

Sound pressure in decibel of a broadband impulse plane wave synthesized by 2.5D using a Kaiser window. The plane wave propagates into the direction of (0,-1,0).

Sound pressure in decibel of a broadband impulse plane wave synthesized by 2.5D using a Kaiser window. The plane wave propagates into the direction of (0,-1,0).

Sound pressure in decibel of a broadband impulse plane wave synthesized by 2.5D using a modified Tukey window. The plane wave propagates into the direction of (0,-1,0).

Sound pressure in decibel of a broadband impulse plane wave synthesized by 2.5D using a modified Tukey window. The plane wave propagates into the direction of (0,-1,0).