Electrical-acoustic transformation device
US10219080B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2015 |
| Grant date | Feb 26, 2019 |
| Priority date | — |
| Expiry date | Dec 9, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2400/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is an electrical-acoustic transformation device, including: a vibration system and a magnetic circuit system with a magnetic gap; wherein the vibration system includes: a diaphragm, a voice coil provided below the diaphragm and suspending in the magnetic gap, a piezoelectric plate provided on one side of the diaphragm, a first frequency division circuit connected to the voice coil, and a second frequency division circuit connected to the piezoelectric plate; and the first frequency division circuit performs frequency division on an externally input first audio signal and outputs same to the voice coil; and the second frequency division circuit performs frequency division on an externally input second audio signal to obtain a high frequency signal to drive the piezoelectric plate. The present invention provides an electrical-acoustic transformation device with super wideband.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.