Rev. A | Page 1 of 12 INTRODUCTION This application note describes the circuit architecture and details required to measure the impedance profile of a commercial loudspeaker using the AD5933 impedance-to-digital converter. By evaluating the acoustic properties of loudspeakers through an impedance measurement from 1960 to 1970, two Australian pioneers, N. Thiele and R. Small, defined the Thiele-...

We report on the recent progress and development of research into cellulose-based electro-active paper for bending actuators, bioelectronics devices, and electromechanical transducers. The cellulose electro-active paper is characterized in terms of its biodegradability, chirality, ample chemically modifying capacity, light weight, actuation capability, and ability to form hybrid nanocomposites....

This paper deals with the sound quality of electro-larynx devices, which is one method of communication for people who have lost their larynx. Current commercially available devices are characterized by an unnatural, mechanical sound. Assuming the availability of a linear transducer several alternative excitation signals are compared to the sound of a state-of-the-art electro-larynx. The signal...

Metamaterials are artificially created multiscale materials with many different applications [1]. We assume periodic microstructure. No specific length scale is demanded for the differentiation between scales. Instead, we consider microscale as consisting of repeating unit cells, whereas macroscale scale, where desired and sometimes unusual physical effects occur. The precise arrangement geomet...

Electro-tactile display has simple mechanical structure and it can present tactile stimulus. However, electro-tactile display lacks of feedback corresponding to touching motion. In this research, we developed a device that combines an electro-tactile display and pressure distribution sensor. The device not only solves problem of unnatural electrical sensation, but also enables expression of hap...

In small-scale hydropower scheme, the most important component is electro-mechanical equipment. Since cost contribution of this component is high because hydrokinetic projects require negligible civil works. Turbine and alternator contribute a major fraction of the hydrokinetic projects. Thus, there is a requirement to estimates the electromechanical equipment cost for a hydrokinetic hydropower...

I nt ro duc t io n 4 What is Electro n ic Equipme nt ? 5 What Pro ducts are Pre s e nt in the Reside nt ial E l e c t ro n ics Waste Stre a m ? 7 What Ma t e r ials Are Used to Ma nu fa c t u re E l e c t ro n ic Pro ducts Found in the Reside nt ial Waste Stre a m ? 7 W hy are Plastics Used in the Ma nu fa c t u re of Electro n ic Equipme nt ? 9 What Plastic Resins Are Used in Electro n ic Equi...