(19)

(11)

EP 3 375 090 A1

(12)

(43) Date of publication: 19.09.2018 Bulletin 2018/38 (21) Application number: 16810462.8 (22) Date of filing: 25.10.2016

(51) International Patent Classification (IPC):  H03F 3/187(2006.01) H03F 1/56(2006.01) H03F 3/45(2006.01) H04R 3/00(2006.01) (86) International application number: PCT/IB2016/056412 (87) International publication number: WO 2017/081571 (18.05.2017 Gazette 2017/20)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA MD (30) Priority: 12.11.2015 IT UB20155535 (71) Applicant: ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA 00143 Roma (IT)	(72) Inventor: ROMEO, Giovanni 00040 Nemi (RM) (IT) (74) Representative: Mulas, Chiara et al Barzanò & Zanardo Roma S.p.A. Via Piemonte, 26 00187 Roma 00187 Roma (IT)