THE experimental results reported in a previous communication 1 confirm the existence of several maxima for the second- and the third-order diffraction lines at oblique incidence and at low sound ...
Google's Home, Amazon's Echo and Apple's Siri all responded to ultrasonic commands Voice-controlled ... at high frequencies that can be heard by dolphins but are inaudible to humans.
当前正在显示可能无法访问的结果。
隐藏无法访问的结果