Introduction to thermoacoustic Stirling engines: First steps and praxis Carmen Iniesta, José Luis Olazagoitia, Jaime Gros, Jordi Vinolas and Javier Aranceta E3S Web Conf., 313 (2021) 08005 Published online: 22 October 2021 DOI: 10.1051/e3sconf/202131308005