EP 0267650 A3 19900425 - LOUDSPEAKER APPARATUS AND METHOD
Title (en)
LOUDSPEAKER APPARATUS AND METHOD
Publication
Application
Priority
US 92885386 A 19861107
Abstract (en)
[origin: EP0267650A2] An open-back baffle loudspeaker having a higher baffle cut-off frequency and a lower resonant frequency of possibly 25-50Hz. The loudspeaker is made with a relatively high "Q" (e.g., between 2 to 4) so that the effect of the "Q" on amplitude counteracts the effect of baffle roll-off, thus causing the amplitude of the output of the loudspeaker to remain substantially constant from the baffle cut-off frequency to the resonant frequency. The result is a loudspeaker which can more faithfully reproduce relatively low frequency sounds.
IPC 1-7
IPC 8 full level
H04R 1/02 (2006.01); H04R 1/28 (2006.01); H04R 1/40 (2006.01)
CPC (source: EP)
H04R 1/2811 (2013.01); H04R 1/403 (2013.01)
Citation (search report)
- [Y] DE 1537629 A1 19700122 - KLEMT ARTHUR
- [A] US 3680658 A 19720801 - GOESKEL HELMUT
- [YD] JOURNAL OF THE AUDIO ENGINEERING SOCIETY, vol. 28, no. 1/2, Jan/Feb 1980, pages 35-39; R.J. NEWMAN: "Dipole Radiator Systems"
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0267650 A2 19880518; EP 0267650 A3 19900425; JP S63219298 A 19880912
DOCDB simple family (application)
EP 87202151 A 19871105; JP 28086687 A 19871106