Abstract
A push-pull type electrostatic ultrasonic transducer includes a vibrating film having a conductive layer and a pair of fixed electrodes provided at respective surfaces of the vibrating film. The front-side fixed electrode and the rear-side fixed electrode sandwich the vibrating film. A plurality of through holes are provided in the front-side fixed electrodes and through holes having the same shape are provided in the rear-side fixed electrode in positions opposed to the respective through holes provided in the front-side fixed electrode. A sound absorbing material is provided facing the rear-side fixed electrode.
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