Patent ID: 8063533
Filing Date: 2011-11-22
Classification: F04B,H01L

Abstract:
1. An electronic device having a piezoelectric pump, comprising: an audio input section; an audio recording section recording input sound from the audio input section; a piezoelectric pump cooling air by a piezoelectric element; a drive circuit driving the piezoelectric element; and a control circuit monitoring and controlling operation of the audio input section, the audio recording section, and the drive circuit, wherein the control circuit obtains a permissible noise margin indicative of a maximum level of air noise emitted from the piezoelectric pump which is permitted amid ambient noise, and wherein, during an audio recording mode in which the input sound is being recorded by the audio recording section, the control circuit utilizes the permissible noise margin in determining whether to decrease the amount of air flow or to maintain the amount of air flow.