The amplification of acoustic wave generated by coupling between plasmons and acoustic phonons in piezoelectric semiconductor plasma is examined using quantum hydrodynamic model. The present study takes care of quantum effects like Fermi degenerate pressure and Bohm potential through quantum parameter- H. a modified dispersion relation is derived for evolution of acoustic wave by employing the linearization technique. An expression for gain coefficient of acoustic wave is obtained in terms of quantum parameter- H under collision dominated limit. The growth rate of the wave is analyzed by varying the parameters like doping concentration n_0 and angular frequency w for different piezoelectric semiconductors. This study seeks its application in designing of many electronic devices such as acoustic wave amplifier, acousto-electric oscillators, acoustic filters etc.
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