Acoustic device, acoustic system, moving body device, and malfunction diagnosis method for acoustic system
US9860638B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2014 |
| Grant date | Jan 2, 2018 |
| Priority date | — |
| Expiry date | Sep 11, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2420/03
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An inspection signal generator of an acoustic device outputs a first inspection signal. An amplifier receives a first reference signal, and outputs a second inspection signal according to the first inspection signal. A first detector is electrically connected to an output side of the amplifier, and outputs a first detection signal based on the second inspection signal. The first detector is electrically connected to the output side of the amplifier, and outputs the first detection signal based on the second inspection signal. A determiner compares a first detection signal output from the first detector with a preset determination reference signal so as to detect electrical abnormality between a ground terminal and an output terminal electrically connected to the output side of the amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.