Audio spot system and audio spot forming method
AssigneeNippon Telegraph and Telephone Corporation
InventorsHisatoshi Kasahara, Yuta Ikeguchi, Yusuke Yoshimura, Atsushi Aratake, Shuichi Yanagi, Suguru Oguchi
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Abstract
An audio spot forming system (S) is an audio spot forming system which transmits an alert sound to a vehicle traveling on a road, the audio spot forming system including a first parametric speaker (1) configured to emit a sideband wave, and a second parametric speaker (2) configured to emit a carrier wave, in which the sideband wave and the carrier wave are caused to intersect with each other on the road to form an audio spot.
Claims18
An audio spot forming system for transmitting an alert sound to a vehicle traveling on a road, the audio spot forming system comprising:
- a first parametric speaker configured to emit a sideband wave;
- and
- a second parametric speaker configured to emit a carrier wave, wherein the sideband wave and the carrier wave intersect with each other on the road to form an audio spot, wherein
- the second parametric speaker includes a plurality of second speakers,
- the plurality of second speakers is arranged along a direction in which the vehicle travels on the road, and
- a plurality of carrier waves emitted from the plurality of second speakers are each caused to intersect with the sideband wave on the road to form a plurality of audio spots.
A method for forming an audio spot where an alert sound is transmitted to a vehicle traveling on a road, the method comprising:
- emitting a sideband wave by a first parametric speaker;
- emitting a carrier wave by a second parametric speaker;
- and
- forming the audio spot by causing the sideband wave and the carrier wave to intersect with each other on the road, wherein
- the second parametric speaker includes a plurality of second speakers,
- the plurality of second speakers is arranged along a direction in which the vehicle travels on the road, and
- a plurality of carrier waves emitted from the plurality of second speakers are each caused to intersect with the sideband wave on the road to form a plurality of audio spots.
Dependencies are inferred from the claim text.