@article{sang2007an, title = {An Analytical Model of a Piezoelectric Unimorph Transducer with an Aluminum Cone}, author = {Sang, Jinqui and Qiu, Xiaojun}, journal = {J. Audio Eng. Soc}, volume = {55}, number = {1/2}, pages = {55--62}, year = {2007}, url = {https://www.aes.org/e-lib/browse.cfm?elib=14150} }