Researchers have developed a device that reflects sound in the direction it came from, rather than deflecting it at an angle. The "retroreflector" can reflect sound across an operating range of 70 ...
Researchers have developed a device that reflects sound in the direction it came from, rather than deflecting it at an angle. The 'retroreflector' can reflect sound across an operating range of 70 ...
一些您可能无法访问的结果已被隐去。
显示无法访问的结果