It's a bit like trying to work out the street plan of a city by Shouting loudly and listening to the sounds that bounce off the walls.

这好比试图找出一个大声大声，听声音的跳出了墙壁城市街道计划位。

youdao

If you have access to a flash that can bounce off the ceiling or walls, that could work much better.

要是您有机会接触下那种可以从天花板或者墙壁反射回来的闪光灯，效果则会明显得多。

youdao

The pod is designed with an inflatable tube around its edges, which should cause it to bounce off the walls of a building.

ECONOMIST: Safety

Similar to the sound bars offered up by many home audio manufacturers, the "Integrated Sound Projector" (iSP) is designed to bounce sound off walls and around the room to give the illusion of surround sound.

ENGADGET: Mitsubishi's new iSP 149 series LCDs have it all in one place