# Vibration Characteristics of Stepped Thickness Circular Cylindrical Piezoelectric Shells for Ultrasound Amplifications

> 2018 doctoral thesis by Ata Meshkinzar at Auckland University of Technology

**Wikidata**: [Q112359633](https://www.wikidata.org/wiki/Q112359633)  
**Source**: https://4ort.xyz/entity/vibration-characteristics-of-stepped-thickness-circular-cylindrical-piezoelectric-shells-for-ultrasound-amplifications