acoustic pulse recognition的用法和样例：
- acoustic pulse recognition (APR)
- The GI GUN is comprised of a generator to create the acoustic pulse and an injector to reduce or suppress the bubble.
- A piece of completely theoretical basis is presented in order to resolve the software design emphasis of the accounting device, such as the procedure design of off-hook and on-hook and dialing pulse recognition.
- Acoustic pulses aregenerated through the mechanism of laser-induced breakdown.
- An unwanted false electronic pulse.