Sound producing device and valve
US10567866B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2019 |
| Grant date | Feb 18, 2020 |
| Priority date | — |
| Expiry date | Mar 29, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sound producing device includes an air pulse generating element and a control unit. The air pulse generating element includes an air chamber, a membrane, a first air entrance and a first valve. The membrane is disposed in the air chamber. The first air entrance is disposed at a side of the membrane in a first direction. The first valve is disposed between the first air entrance and the membrane. The control unit generates a driving signal to control a movement of the membrane, such that the air pulse generating element generates an air pulse in response to the driving signal. During an operation, an first airflow corresponding to the air pulse flows into or flows out of the air chamber through the first air entrance, and passes through the first air entrance substantially along a direction parallel to the first direction perpendicular to the moving direction of the membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.