| 摘要 |
<p>An acoustic transmitter or receiver comprising a piezoelectric polymer film (10) having a pair of electrodes (12,14) deposited thereupon such that in the transmission mode an electrical signal applied to the electrodes (12,14) deforms the piezoelectric polymer film (10) thereby creating an acoustic signal and in the receive mode an incident acoustic signal deforms the piezoelectric polymer film (10) thereby creating an electrical response across the electrodes; characterized in that: the piezoelectric polymer film (10) is formed into a compliant cylinder. <IMAGE></p> |
