Moving object equipped with ultra-directional speaker
US7424118B2 · kind B2 · utility
9Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2005 |
| Grant date | Sep 9, 2008 |
| Priority date | — |
| Expiry date | Apr 20, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S7/303
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A moving object 1 equipped with ultra-directional speaker is provided with an emitter 44 for measuring a distance to a target 11 to which it is to provide a voice by using an ultrasonic transmit sensor 45 and an ultrasonic receive sensor 46 thereof, and for emitting an output signal having a predetermined sound level which is adjusted by an amplifier 34 with sound level adjusting function. The moving object 1 can thus transmit a voice having an optimal volume only to the specific target through parametric action.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.