This is an experiment kit for a super unidirectional audible speaker using ultrasonic waves.

-Ultrasonic carrier waves are emitted by 50 ultrasonic transducers, modulated at low frequency, and sent out.

It is completely different from the concept of conventional speakers.

Ultrasonic waves travel in a very straight line, so they are loudest in front of you and become inaudible a little further away.

It has characteristics similar to light and reflects sound severely, so if you point it at a wall, you will hear the sound from the wall.

You can hear the sound from the front even from tens of meters away.

・Although it is an experimental kit, it is fully usable and can be used in various places depending on your ideas.

・Unfortunately, the sound quality is not HiFi but in the audio frequency band (about 400Hz to 5KHz).

Ideal for making audio announcements limited to a specific area.

- Input from the earphone output of the audio device. (monaural)

・Power supply: DC12V

100% official product

It is also sold in Japan, so please purchase it as soon as possible.

Import duties, taxes and fees are not included in the item price or shipping charges. These charges are the responsibility of the buyer. Please check with your country's customs office to determine how much these additional costs will be before bidding or purchasing.

Items are to Japanese specifications.　

All electrical appliances are 100V compatible.

Remote area fees may apply.