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The signal that arises from the droplet phase transition generates a millimetric-sized gas bubble that is recorded by acoustic means. I describe the SIMPLE detectors, their acoustic instrumentation and signal analysis, which generated several science measurements executed through several phases over the last 20\u00a0years: the Pilot Phase\u00a0with an exposure of 0.19\u00a0kgd, Phase\u00a0I with an exposure of 0.42\u00a0kgd, Phase\u00a0II with an exposure of 18.24 kgd and, an intended Phase\u00a0III with an expected exposure increasing from 100 to 2500\u00a0kgd to be executed with a bubble chamber. <\/jats:p>","DOI":"10.1142\/s0217751x20300057","type":"journal-article","created":{"date-parts":[[2020,4,17]],"date-time":"2020-04-17T09:27:50Z","timestamp":1587115670000},"page":"2030005","source":"Crossref","is-referenced-by-count":2,"title":["A SIMPLE review"],"prefix":"10.1142","volume":"35","author":[{"given":"M.","family":"Felizardo","sequence":"first","affiliation":[{"name":"Centro de Ci\u00eancias e Tecnologias Nucleares, Departamento de Engenharia e Ci\u00eancias Nucleares, Instituto Superior T\u00e9cnico, Universidade de Lisboa, 2695-066 Bobadela, Portugal"}]}],"member":"219","published-online":{"date-parts":[[2020,4,17]]},"reference":[{"key":"S0217751X20300057BIB001","doi-asserted-by":"publisher","DOI":"10.1088\/1367-2630\/2\/1\/14"},{"key":"S0217751X20300057BIB002","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.85.3083"},{"key":"S0217751X20300057BIB003","doi-asserted-by":"publisher","DOI":"10.1016\/j.physletb.2005.06.070"},{"key":"S0217751X20300057BIB004","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.105.211301"},{"key":"S0217751X20300057BIB005","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.108.201302"},{"key":"S0217751X20300057BIB006","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevD.89.072013"},{"key":"S0217751X20300057BIB007","doi-asserted-by":"publisher","DOI":"10.1088\/1742-6596\/375\/1\/012017"},{"key":"S0217751X20300057BIB008","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.108.259002"},{"key":"S0217751X20300057BIB009","series-title":"E3S Web Conf.","first-page":"03002","volume":"12","author":"Felizardo M.","year":"2016"},{"key":"S0217751X20300057BIB010","series-title":"E3S Web Conf.","first-page":"03002","volume":"4","author":"Felizardo M.","year":"2014"},{"key":"S0217751X20300057BIB011","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevD.86.052001"},{"key":"S0217751X20300057BIB012","doi-asserted-by":"publisher","DOI":"10.1016\/j.physletb.2012.03.078"},{"key":"S0217751X20300057BIB013","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.118.251301"},{"key":"S0217751X20300057BIB014","doi-asserted-by":"publisher","DOI":"10.1063\/1.1724333"},{"key":"S0217751X20300057BIB015","first-page":"A1","volume":"594","author":"Adam R.","year":"2015","journal-title":"Astron. 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