CAO Yi-jiang~1, SUN Zhi-bin~1, LIU Xiao-wei~2, et al. The research of the electret acoustic sensor signal acquisition system[J]. 2006, (10): 19-21. DOI: 10.13873/j.1000-97872006.10.007.
The basic properties and principle of electret acoustic sensor are introduced.A super-low power consumed system MSP430F149 SCM which is popular in the world today is used as micro-controller
and a super-low power consumed and portable system of electret acoustic sensor signals collection is designed.The collected samples of acoustic signals can be returned to the fomer sound
and the wavefarm returned is analyzed by using the communication data displaying software.The sound collection system has good expansibility.For different variables
collecting and disposing of the sensor signals can be exchanged.The result of experiment indicates
the average power when the system is not operated is 3.73 mW;the power when FLASH is writed is 137.25 mW