WestartourfinalshowoftheyearwithsomepeculiarhappeningsinNewJersey, whereweeksofunexplaineddronesightingsacrossthestatehaveprompted a jointfederalandstateinvestigation.
Theyoftenappearinclustershighintheskywhenit's dark, butthey'vebeenreportedtobeaboutsixfeetindiameter, whichisofcourselargerthanthetypicalsizeof a dronethatyoumightseesomeoneflyingas a hobby.
They'vefrequentlyseenthedroneshoveringoverheadandhavenoticedtheyseemtobehangingovercriticalsiteslike U.S. militaryresearchfacilityorevenoverPresident-electDonaldTrump's golfcourseinBedminster.
We'vebeenworkingonacousticlevitationforthelastdecadeordecadeand a half.
私たちはこの10年、あるいは10年半、音響浮揚に取り組んできた。
We'vealwaysbeenlookingandexploringatwaysinwhichwecanfloatobjectsinmidairusingultrasoundanditwasalways a blueskyideauntilabout a yearagowhensomeofmyco-foundersweresaying, oh, maybethere's a commercialopportunityforthis.
Acoustifabhasperfectedtheabilitytopickup a dropletor a smallparticle, adjustitmidair, thenmoveitto a specificlocation, doingallofthiswithonlyusingsoundwaves.
Soforexample, wecanmakethemallcometogetherto a pointandwecanmaketransducersfromthebottomandfromthetopcometotwodifferentpointsthatarehalf a wavelengthapart.