Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1993-12-16
1994-10-25
Isen, Forester W.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
381154, 381160, 381 90, 381188, 181153, 181156, H03G 500
Patent
active
053596641
ABSTRACT:
A loudspeaker system is arranged to house an electromagnetic loudspeaker driver of the type having both front and back acoustic waves. The loudspeaker driver is reversed mounted such that its weaker back waves are emitted directly to the outside, while its stronger front waves are directed through an internal passageway of the loudspeaker enclosure before adding in phase and exiting with the back waves. The front waves are phase-shifted by half a wavelength through the internal passageway which acts as a transmission line. The attenuation suffered through the transmission line is offset somewhat by the stronger front waves such that the differential amplitudes of the front and back exiting waves are minimized. Throughout the transmission line, the flow of the sound waves is kept circular and laminar in order to maintain coherence and to further minimize loss of energy due to turbulence. These are accomplished by the use of a cylindrical passageway, a streamlining reflecting cone, and an outer reflecting ring. Finally, the exiting front and back waves are deflected into the listening environment via a sound reflecting surface positioned near the exit of the loudspeaker enclosure. Additionally, the loudspeaker system employs an efficient crossover network which include a low-pass network branch for each loudspeaker driver in the system.
REFERENCES:
patent: 3327808 (1965-06-01), Sharper
patent: 4137510 (1979-01-01), Iwahara
patent: 4298087 (1981-11-01), Launay
patent: 4378471 (1983-03-01), Shintaku
patent: 4434507 (1984-02-01), Thomas
patent: 4593784 (1986-06-01), Flanders
patent: 4597100 (1986-06-01), Grodinsky et al.
patent: 4616731 (1986-10-01), Robinson
patent: 4771466 (1988-09-01), Modafferi
patent: 5177329 (1993-01-01), Klayman
patent: 5189706 (1993-02-01), Saeki
Isen Forester W.
Steuben Richard
LandOfFree
Loudspeaker system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Loudspeaker system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Loudspeaker system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-141580