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:
Sep. 29, 2009
Filed:
Jun. 24, 2004
Daisuke Higashihara, Hyogo, JP;
Daisuke Higashihara, Hyogo, JP;
TOA Corporation, Kobe-shi, JP;
Abstract
A howling margin measuring devicecomprises processing meanscomposed of gain controlling meansand a compressorwhich are connected in series and controlling means. The gain controlling meansoutputs an input sound signal after giving a gain thereto. If the level of a sound signal input to the compressoris equal to or higher than a threshold level, the compressoroutputs the sound signal after compressing it with a specified ratio. The controlling meansis capable of controlling the gain of the gain controlling meansand reading the compression level of the compressor. The controlling meansreads the compression level of the compressorwhile gradually increasing the gain of the gain controlling means, determines whether or not howling has been generated based on whether the read compression level has a value equal to or higher than a specified value, and calculates a howling margin based on the gain of the gain controlling meanswhen it is determined that howling has been generated.