Method of generating an electrical output signal and acoustical/electrical conversion system
AssigneePhonak AG
InventorHans-Ueli Roeck
Life of this patent
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Abstract
At a beamformer with at least two acoustical/electrical converters (M1, M2) the outputs (A1, A2) thereof are operationally connected to a beamformer unit (12). There signals dependent on signals (S1, S2) arising at said outputs (A1, A2) are co-processed to result in a beamformer output signal (Sa) dependent on both output signals of the converters. Frequency roll-off of the output signal (Sa) is counteracted by establishing a gain mismatch (10) of the two gains between the acoustical input signal (A) on one hand and the inputs to unit 12.
Claims24
A method of generating an electrical output signal as a function of acoustical input signals impinging on at least two acoustical/electrical converters, the gain between said acoustical input signals and said electric output signal being dependent on the spatial angle with which said acoustical input signals impinge on said at least two converters and on frequency of said acoustical input signals, and wherein further first and second signals respectively depending on said acoustical input signals are co-processed to result in a third signal which is dependent on both said first and said second signals, characterized by establishing a desired frequency dependency of said gain by installing a mismatch of gain of said acoustical input signal to said first signal and of said acoustical input signal to said second signal,
An acoustical/electrical conversion system comprising at least two acoustical to electrical converters, respectively with a first and a second output, said outputs being operationally connected to inputs of a co-processing unit generating an output signal dependent on signals on both said first and said second outputs, the output of said co-processing unit being operationally connected to an output of said system, whereat a signal is generated, which A is dependent on an acoustical signal impinging on said at least two converters and from spatial angle with which said acoustical signal impinges on said at least two converters as well as on frequency of said acoustical signal, characterized by the gains between acoustical inputs to said converters and said inputs of said co-processing unit being mismatched to provide for a desired dependency of said signal generated at said output of said system from said frequency.
Dependencies are inferred from the claim text.