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. 01, 2020
Filed:
Apr. 20, 2018
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Abstract
A control device includes a first communication circuit, a microphone, and a first control circuit. The first control circuit: acquires background noise in the room through the microphone and calculates a signal level of the background noise; transmits, to a playback device, a first control signal directing playback of a first test signal through a loudspeaker; acquires the first test signal through the microphone and calculates a signal level of the acquired first test signal; estimates a signal level of a second test signal using the signal level of the first test signal as a reference; increases a set value of a sound volume of the second test signal when a signal level obtained by subtracting a predetermined value from the estimated signal level of the second test signal is less than or equal to the signal level of the background noise; transmits, to the playback device, a second control signal directing playback of the second test signal through the loudspeaker; acquires the second test signal through the microphone, calculates a frequency response of the room, and calculates a correction coefficient based on the calculated frequency response; and transmits a third control signal including the calculated correction coefficient to the playback device.