EP 0353092 A3 19910102 - APPARATUS AND METHOD FOR REPRODUCING HIGH FIDELITY SOUND
Title (en)
APPARATUS AND METHOD FOR REPRODUCING HIGH FIDELITY SOUND
Publication
Application
Priority
US 22517188 A 19880728
Abstract (en)
[origin: EP0353092A2] A horn-equipped loudspeaker is provided which has an electro-acoustic transducer to convert electrical signals into acoustical signals, a coil (1) with input terminals (2,3) for receiving the electrical signals and at least one movable diaphragm (20) for the emission of acoustical signals. The loudspeaker also includes a horn (22) with walls arranged facing each other. The separation between the horn walls progressively increases from a small input area (23), or throat, to a large output region (24), or mouth. The loudspeaker diaphragm (20) is formed of a portion of one of the walls of the input area of the horn.
IPC 1-7
IPC 8 full level
CPC (source: EP KR)
H04R 1/30 (2013.01 - EP); H04R 19/01 (2013.01 - KR)
Citation (search report)
- [X] US 2956636 A 19601018 - BOERSMA SIPKO L
- [X] GB 1224475 A 19710310 - CESATI MARIO [IT]
- [A] US 1887629 A 19321115 - FORSE WILLIAM T, et al
- [A] US 2440078 A 19480420 - DEVINE GEORGE F
- [A] US 4297538 A 19811027 - MASSA FRANK
Designated contracting state (EPC)
DE GB IT NL
DOCDB simple family (publication)
EP 0353092 A2 19900131; EP 0353092 A3 19910102; JP H02161895 A 19900621; KR 910004063 A 19910228
DOCDB simple family (application)
EP 89307705 A 19890728; JP 19643989 A 19890728; KR 890010607 A 19890727