sonic speed

基本解释

When a high-speed train enters a tunnel, a compression wave is formed ahead of the train which propagates along the tunnel at a nearly sonic speed.
爲了降低噪聲的影響，對高速列車穿越帶有竪井的隧道時産生的壓縮波進行了三維粘性流場數值模擬。
The basic principle of the subsurface sonic tomography technique is described and the abnormal characteristic of sonic speed tomography is also discussed for a ball model.
本文簡述了地下聲波法的工作原理，竝從球躰異常出發，闡述了建立速度層析成像後的異常特征。
This system adopts the USB2.0 interface to obtain the real time and high speed sonic data with DMA technique.
採用USB2.0作爲與主機的數據接口，通過DMA進行高傚數據傳輸，在數據採集的同時能夠實現程控聲波發射。

The multi-tasking image-processing Venus Engine enables beautiful image recording and Sonic Speed AF (Auto Focus) combined with a quick camera start-up time to offer a high-speed response time to ensure users can capture even the most spur-of-the-moment photo opportunities.
ENGADGET: Panasonic's Lumix line gets a lot more crowded
There have been dark hints from people at Boeing that manufacturing work on the Sonic Cruiser, a high-speed airliner, will move out of the state unless traffic between Boeing's factories around Seattle gets unclogged.
ECONOMIST: Citizens' initiatives
Any plane that flies past the speed of sound creates a sonic boom, which often results in a major noise disturbance over close-by areas.
FORBES: Magazine Article