Recent development and futuristic applications of MEMS based piezoelectric microphones

Development of MEMS-Based Piezoelectric Microvalve Technologies

Passive wireless MEMS microphones for biomedical applications.

This paper introduces passive wireless telemetry based operation for high frequency acoustic sensors. The focus is on the development, fabrication, and evaluation of wireless, battery-less SAW-IDT MEMS microphones for biomedical applications. Due to the absence of batteries, the developed sensors are small and as a result of the batch manufacturing strategy are inexpensive which enables their u...

Recent Progress on BaTiO3-Based Piezoelectric Ceramics for Actuator Applications

Due to issues with Pb toxicity, there is an urgent need for high performance Pb-free alternatives to Pb-based piezoelectric ceramics. Although pure BaTiO3 material exhibits fairly low piezoelectric coefficients, further designing of such a material system greatly enhances the piezoelectric response by means of domain engineering, defects engineering, as well as phase boundary engineering. Espec...

Futuristic Mobile Applications

Advent of smart phones has brought with it revolution in mobile applications that are available for everyday functions. In this paper we review security requirements for apps from different domains that are communicating sensitive information over insecure network. Some of these apps are already available and some are expected to be introduced in future. We find that there are many parameters t...

Speech processing using digital MEMS microphones

The last few years have seen the start of a unique change in microphones for consumer devices such as smartphones or tablets. Almost all analogue capacitive microphones are being replaced by digital silicon microphones or MEMS microphones. MEMS microphones perform differently to conventional analogue microphones. Their greatest disadvantage is significantly increased self-noise or decreased SNR...