Acoustic characteristic correction device
May 5, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesData acquisition system Automatic time domain equalization of audio signals ROM compensated microphone Automatic sound field correcting system Method and apparatus for measuring and correcting acoustic characteristic in sound field Digital equalizer apparatus enabling separate phase and amplitude characteristic modification Method of and arrangement for adjusting the transfer characteristic to two listening position in a space Dual channel signal processor using weighted integration of log-ratios and ion beam position sensor utilizing the signal processor Filter device and electronic musical instrument using the filter device System and method of producing adaptive FIR digital filter with non-linear frequency resolution Patent #: 5272656 InventorsAssigneeApplicationNo. 238510 filed on 05/05/1994US Classes:702/103, Acoustic381/101, Automatic tone control381/103, Having automatic equalizer circuit708/322AdaptiveExaminersPrimary: Voeltz, Emanuel T.Assistant: Assouad, Patrick Attorney, Agent or FirmForeign Patent References
International ClassH03G 005/00Foreign Application Priority Data1993-05-11 JPAbstractAn acoustic characteristic correction device includes a section for setting a desired characteristic of a response characteristic in a reproduction system including a sound field, a section for outputting information of a measured characteristic of the response characteristic, a section for computing a correction characteristic for realizing the desired characteristic on the basis of the desired characteristic and the measured characteristic, and a section for imparting the computed correction characteristic to a sound signal to be reproduced. The device may further includes a display section for displaying the set desired characteristic, a section for controlling the level or frequency of the computed correction characteristic, a section for imparting a compensation characteristic to the correction characteristic. Results of measurement at plural points for plural measuring times may be stored and an average value of the results of measurement may be used as a measuring signal. In measuring a response characteristic by using a TSP signal, a convolution operator may be used commonly for time compression by an inverse filter characteristic and imparting of a correction characteristic.Other References
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