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1. (WO2018220028) ELECTRODYNAMIC LOUDSPEAKER WITH AT LEAST TWO SEALS DEFINING AN INTERMEDIATE CAVITY FILLED WITH AIR

Pub. No.:    WO/2018/220028    International Application No.:    PCT/EP2018/064210
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Thu May 31 01:59:59 CEST 2018
IPC: H04R 7/20
Applicants: DEVIALET
Inventors: RAINER, Max
Title: ELECTRODYNAMIC LOUDSPEAKER WITH AT LEAST TWO SEALS DEFINING AN INTERMEDIATE CAVITY FILLED WITH AIR
Abstract:
An electrodynamic loudspeaker (5) comprising: - a frame (3), - an assembly moving in translation with respect to the frame (3) along an axis (D) of the loudspeaker (5) about an equilibrium position that is occupied when the loudspeaker is at rest, the assembly comprising at least one membrane (25) configured to emit sound waves, and a connection member (31) attached on the membrane and extending from the membrane to the inside of the loudspeaker, and - a first seal (21) for suspending the assembly, connecting the assembly and the frame, the first seal having a cross-section projecting towards the inside of the loudspeaker. The loudspeaker further comprises a second seal (23) for suspending the assembly, connecting the connection member and the frame, the second seal being situated axially with respect to the first seal on the inside of the loudspeaker, the second seal being radially outside the connection member, the assembly, first seal, second seal and frame defining an intermediate cavity (37) filled with air and with restricted air leak.