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:
Mar. 17, 2026
Filed:
Dec. 20, 2023
Panasonic Intellectual Property Corporation of America, Torrance, CA (US);
Hiroki Furukawa, Osaka, JP;
Shinichi Yuzuriha, Osaka, JP;
PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA, Torrance, CA (US);
Abstract
A howling suppressing device includes: an adaptive filter that estimates an acoustic feedback characteristic representing a characteristic of an acoustic feedback sound reaching a microphone from a speaker by defining an output signal to the speaker as a reference signal, and eliminates the acoustic feedback sound from an input signal obtained via the microphone by using the estimated acoustic feedback characteristic; an estimator that estimates, on the basis of the acoustic feedback characteristic, an acoustic feedback amplitude frequency characteristic in a frequency domain; a suppression gain calculator that calculates, from the acoustic feedback amplitude frequency characteristic, a suppression gain in the frequency domain for smoothing a frequency peak of the acoustic feedback amplitude frequency characteristic; and a suppressor that suppresses an output signal from the adaptive filter in the frequency domain by using the suppression gain.