INDOOR POSITION INFORMATION PROVIDING APPARATUS, POSITION NOTIFIER APPARATUS AND PROGRAM
First Claim
1. A position information providing apparatus for providing present position information indicating a present position to a position notifier apparatus having a function to notify the present position, the position information providing apparatus comprising:
- an ultrasonic wave output device that outputs ultrasonic wave having a predetermined ultrasonic frequency;
a controller thathas a plurality of predetermined detectable frequencies which are within a frequency range detectable by a speech input device of the position notifier apparatus and which are lower than the ultrasonic wave frequency,sequentially selects one detectable frequency as a modulation frequency from among the plurality of detectable frequencies in accordance with contents of the present position information, andcontrols the ultrasonic wave output device so that a maximum value or a minimum value of amplitude of the ultrasonic wave varies with the selected modulation frequency.
1 Assignment
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Accused Products
Abstract
A position information providing apparatus for providing present position information to a position notifier apparatus is provided. The position information providing apparatus includes an ultrasonic wave output device for outputting ultrasonic wave and a controller for controlling the ultrasonic wave output device. In accordance with contents of the present position information, the controller sequentially selects a modulation frequency from among multiple detectable frequencies which are detectable by the position notifier apparatus and which are lower than an ultrasonic wave frequency. The controller controls the ultrasonic wave output device so that a maximum value or a minimum value of amplitude of the ultrasonic wave varies with to the selected modulation frequency.
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Citations
6 Claims
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1. A position information providing apparatus for providing present position information indicating a present position to a position notifier apparatus having a function to notify the present position, the position information providing apparatus comprising:
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an ultrasonic wave output device that outputs ultrasonic wave having a predetermined ultrasonic frequency; a controller that has a plurality of predetermined detectable frequencies which are within a frequency range detectable by a speech input device of the position notifier apparatus and which are lower than the ultrasonic wave frequency, sequentially selects one detectable frequency as a modulation frequency from among the plurality of detectable frequencies in accordance with contents of the present position information, and controls the ultrasonic wave output device so that a maximum value or a minimum value of amplitude of the ultrasonic wave varies with the selected modulation frequency. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification