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US 8,917,898 B2Granted
Acoustic loudspeaker
AssigneeFocal Jmlab
InventorsDaniel Emonts, Arnaud Cazes Bouchet
Life of this patent
Estimating the term…
Abstract
The invention relates to an acoustic loudspeaker which includes a magnetic field source. A mobile apparatus includes a diaphragm and a first winding capable of allowing passage of an electrical current representing the sound signal to be generated and of interacting with the magnetic field. The acoustic loudspeaker includes a second winding, both terminals of which are connected by a resistive component. Both terminals of the second winding are electrically isolated from the terminals of the first winding.
Claims4
An acoustic loudspeaker comprising:
- a magnetic field source;
- a moving part comprising a membrane, a first coil capable of conducting an Electric current representative of the sound signal to be generated, and of interacting with said magnetic field and a second coil having two terminals, said second coil electrically isolated from said first coil;
- a set of essentially resistive elements of different resistance values, and means for connecting one of said elements across the terminals of said second coil.
Dependencies are inferred from the claim text.