This article is within the scope of the Military history WikiProject. If you would like to participate, please visit the project page, where you can join the project and see a list of open tasks. To use this banner, please see the full instructions.Military historyWikipedia:WikiProject Military historyTemplate:WikiProject Military historymilitary history articles
This article is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.PhysicsWikipedia:WikiProject PhysicsTemplate:WikiProject Physicsphysics articles
This article is part of WikiProject Underwater diving, an effort to create, expand, organize, and improve Underwater diving-related articles to a feature-quality standard, and to comprehensively cover the topic with quality encyclopedic articles.Underwater divingWikipedia:WikiProject Underwater divingTemplate:WikiProject Underwater divingUnderwater diving articles
I don't have the necessary details to write the text, but I'm aware that ultrasound modulated with audio is actually naturally demodulated by the human air/ear interface. I have seen this used in phased ultrasound transducer arrays that use the short wavelength of ultrasound frequency to allow wave guiding using a phased array, but an audio signal is modulated in allowing the guided wave to be heard. This is actually used in some surround sound systems where a single source can be used, and the audio is deliberately directed to areas of the room, giving the impression of surround sound. I think this information would be a good addition to this article --LightYear12:30, 24 February 2007 (UTC)[reply]
.jpg)
.jpg){kind=small}
