subsonic

1. 1.

   having a frequency too low to be audible

   频率低到无法听见的。

2. 2.

   (aviation) less than the speed of sound (in the same medium, and at the same temperature and pressure)

   (航空)低于声速(在相同介质、相同温度和压力下)。

3. 3.

   with a Mach number such that 0.3 < Ma < 0.8 (approximately - the exact limits vary between sources)

   马赫数在0.3至0.8之间(近似值,确切范围因来源而异)。

(航空)低于声速(在相同介质、相同温度和压力下)。；马赫数在0.3至0.8之间(近似值,确切范围因来源而异)。；比音速稍慢的；次音速的；[医] 听域下的

Connections

Learner notes