| Patent Number |
Title Of Patent |
Date Issued |
| 4741040 |
Bass-reflex loudspeaker system |
April 26, 1988 |
| A bass-reflex loudspeaker system in which, by the addition of a corrective network (7) to an arrangement of a transducer (1) accommodated in a bass-reflex enclosure (2), which transducer is dimensioned such that it cannot be bass-reflexed by means of the bass-reflex enclosure, it is |
| 4709391 |
Arrangement for converting an electric signal into an acoustic signal or vice versa and a non-li |
November 24, 1987 |
| An arrangement for converting an electric signal into an acoustic signal (y/t) or vice versa, comprises an electroacoustic transducer (2) and means (3) for reducing distortion in the output signal of the arrangement, which distortion is caused by the electroacoustic or acoustoelectric co |
| 4649565 |
Electro-acoustic converter with compensated frequency response characteristic |
March 10, 1987 |
| A device for converting an electric signal into an acoustic signal, which comprises an electro-acoustic transducer unit (2) having a quality factor (Q) less than unity. The device further comprises an amplifier circuit (3) for driving the transducer unit. The amplifier circuit has a |
| 4547631 |
Large-excursion electroacoustic transducer |
October 15, 1985 |
| An electroacoustic transducer comprises a diaphragm (1), a magnet system (4) and a voice coil (3) arranged on a voice-coil former (2) in an air gap (5) of the magnet system. The movement is transmitted between the voice-coil former and the diaphragm via a lever mechanism comprising n |
| 4395588 |
MFB system with a by-pass network |
July 26, 1983 |
| A device for driving an electroacoustic transducer (1) comprising a feedback amplifier and a pickup (2) whose output signal is a measure of the acoustic output signal of the transducer. A by-pass network (4) bypasses at least the transducer and the pickup and produces an output signa |
| 4379952 |
Mechanical filter for an electrodynamic transducer |
April 12, 1983 |
| An electrodynamic transducer having a mechanical filter as a coupling element between a voice coil former (3) and cone (1) in order to obtain a frequency characteristic whose high frequency roll-off begins at a lower frequency, in which a part (7) of the centering diaphragm (4) situated |
