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:
Jan. 13, 2026
Filed:
Feb. 09, 2024
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Hiroaki Sakurai, Nagoya, JP;
Kunito Takahashi, Hamamatsu, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
A communication device includes a D/A converter that generates an audio signal that is output as audio from a speaker, and an A/D converter that generates an input audio signal from audio collected by a microphone. The communication device generates a diagnostic audio signal that is output as diagnostic audio at a frequency that is outside of human hearing range. When the diagnostic audio is output from the speaker, the communication device generates an input audio signal based on the audio collected by the microphone and determines whether an abnormality has occurred based on a comparison of the original diagnostic audio signal with the input audio signal generated based on the diagnostic audio collected by the microphone.