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High Efficiency Transducer for Transmission to Air
The Journal of the Acoustical Society of America, 1959The basic problems of transduction to low acoustic impedance media are considered. The advantages offered by flexure mode vibration of driving elements are shown. Selection of a driving element consisting of a free disk supported at the nodal circle is made. Fabrication in quartz and ceramic is described.
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Energy Efficient Radio Transmission with Wavelets
2018 IEEE 29th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 2018The application of wavelet packet modulation in the green radio transmission is addressed. Using the wavelet technology, and complying with the wavelet restrictions, an optimal signal will be designed by the minimization of the transmit power.
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