Moving object equipped with ultra-directional speaker

Details Moving object equipped with ultra-directional speaker Moving object equipped with ultra-directional speaker

2005-02-10

2008-09-09

Chin, Vivian (Department: 2615)

Electrical audio signal processing systems and devices

One-way audio signal program distribution

C381S079000, C381S104000

Reexamination Certificate

active

07424118

ABSTRACT:
A moving object1equipped with ultra-directional speaker is provided with an emitter44for measuring a distance to a target11to which it is to provide a voice by using an ultrasonic transmit sensor45and an ultrasonic receive sensor46thereof, and for emitting an output signal having a predetermined sound level which is adjusted by an amplifier34with sound level adjusting function. The moving object1can thus transmit a voice having an optimal volume only to the specific target through parametric action.

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