Beams of sound immerse you in music others can't hear

[more10]

NewScientist: Beams of sound immerse you in music others can't hear (http://www.newscientist.com/article/mg22129544.100-beams-of-sound-immerse-you-in-music-others-cant-hear.html?utm_source=NSNS&utm_medium=SOC&utm_campaign=hoot&cmpid=SOC%7CNSNS%7C2013-GLOBAL-hoot#.Uu0jh_msifc)

[1audiohack]

You could drive people crazy with this!

"Did you hear that?!? No?!? YOU CAN'T HEAR THAT?!!"

Haha, I want one already!

Barry.

[more10]

In school we went to Drottningholm Palace (http://www.kungahuset.se/royalcourt/royalpalaces/drottningholmpalace.4.396160511584257f218000368.ht ml). There is an elliptical room somewhere on the premises. Two persons standing in separate vertices can talk to each other without anyone else heraring their conversation. Different techhology though.

[gferrell]

In school we went to Drottningholm Palace (http://www.kungahuset.se/royalcourt/royalpalaces/drottningholmpalace.4.396160511584257f218000368.ht ml). There is an elliptical room somewhere on the premises. Two persons standing in separate vertices can talk to each other without anyone else heraring their conversation. Different techhology though.

They had something like that on the 60's tv show Get Smart.

[grumpy]

Lol... Except this works. A version of what more10 described is/was in the Ruben H. Fleet Space Museum in San Diego... purpose-built for demonstration (large parabolic reflectors, separated across a large room).
Left an impression on me as an early teen.