Apparatus and method for checking loudspeaker
US7813514B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 1, 2006 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | Aug 11, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R29/002
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A loudspeaker checking apparatus includes a signal generating unit configured to generate a test tone signal by adding first and second sinusoidal signals of different frequencies; a control circuit configured to allow the signal generating unit to generate a plurality of test tone signals by varying the frequencies; an output circuit configured to simultaneously supply the plurality of test tone signals to a plurality of loudspeakers, respectively; an analyzing unit configured to perform frequency analysis on an output signal from a microphone that picks up test tones output from the plurality of loudspeakers; and a determining unit configured to determine whether the respective loudspeakers are normal or abnormal on the basis of an analysis result made by the analyzing unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.