Electrical audio signal processing systems and devices – Electro-acoustic audio transducer
Patent
1988-01-07
1989-08-01
Ng, Jin F.
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
181152, 181156, 181159, 181194, H05K 500
Patent
active
048539643
ABSTRACT:
Electroacoustic apparatus for reproducing lowest to medium frequencies being provided with a housing wherein a folded exponential horn combined with a loudspeaker is defined having five horn element walls lengthening the horn with good exponential form toward its throat and bent horn element walls provided in the area ending in the horn mouth and at foldings above the mouth and forming the horn with high approximation to an exponential function. The horn element walls are arranged so that undesired reflections are substantially avoided and no sharp break points exist in the course of the horn which is advantageously prolongated toward its throat, and a high characteristic acoustic impedance as well as a linear frequency reproduction characteristic over a wide range are achieved.
REFERENCES:
patent: 3432002 (1969-03-01), Cohen
patent: 4138594 (1979-02-01), Klipsch
patent: 4210223 (1980-07-01), Gillum et al.
patent: 4524846 (1985-06-01), Whitby
Daser Moritz
Eggebrecht Eric
Giessler Johannes
Haghani Mehdi
Institut Lucius
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