Headphone, and volume adjustment method thereof
US12089020B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 11, 2022 |
| Grant date | Sep 10, 2024 |
| Priority date | — |
| Expiry date | Feb 16, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2430/01
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A headphone includes: a first switch, switched off while at least one of left and right speakers faces inward, and switched on while both speakers face a predetermined direction; left and right amplifiers, amplifying input left and right audio signals and connecting them to the speakers; a second switch, selecting, as a path of the left and right audio signals, either a first path passing through an amplifier or a second path passing through an amplifier and being amplified with an amplification factor smaller than that of the first path; and a volume adjuster, decreasing volume of the left and right audio signals input to the left and right amplifiers in a first state in which the first path is selected and the first switch is off to be less than the volume in a second state in which the first path is selected and the first switch is on.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.