@patent{kergourlay:hal-01136840, TITLE = {{Driving a loudspeaker diaphragm at nodal positions}}, AUTHOR = {Kergourlay, G{\'e}rald and Doar{\'e}, Olivier}, URL = {https://ensta-paris.hal.science/hal-01136840}, NUMBER = {GB2492165}, ADDRESS = {United Kingdom}, YEAR = {2012}, MONTH = Dec, HAL_ID = {hal-01136840}, HAL_VERSION = {v1}, }