The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 30, 2007
Filed:
Sep. 11, 2003
Stephen L. Martin, Acton, MA (US);
Gregory B. Burlingame, Woburn, MA (US);
John R. David, Cambridge, MA (US);
Glenn G. Rogge, Pepperell, MA (US);
Stephen L. Martin, Acton, MA (US);
Gregory B. Burlingame, Woburn, MA (US);
John R. David, Cambridge, MA (US);
Glenn G. Rogge, Pepperell, MA (US);
Boston Acoustics, Inc., Peabody, MA (US);
Abstract
Audio processing methods and apparatus are provided for at least partially compensating for the Fletcher-Munson effect. An audio processor includes a variable filter receiving an input signal and providing a filtered output signal, the variable filter having a fixed cutoff frequency and a quality factor that is controllable in response to a control signal, and a control circuit configured to detect a signal level representative of input signal level in a selected band and to generate the control signal in response to the detected signal level. The control circuit may include a low-pass band select filter and a detector for detecting a signal level in the band selected by the low-pass filter and for generating the control signal.