US 2019/0320257 A1 · Loudspeaker Enclosure with Closeable Port

Abstract

A loudspeaker device comprising a loudspeaker unit comprising a diaphragm with a first and second surface (such as the front and rear surface of the diaphragm, respectively) and an enclosure in which the loudspeaker unit is mounted such that the first surface of the diaphragm is in acoustic communication with the surroundings of the loudspeaker device. The device further comprises an internal cavity formed in the enclosure and being in acoustic communication with the surroundings of the loudspeaker device via an acoustic element. In the device, the second surface of the diaphragm is in acoustic communication with the internal cavity. The acoustic element can be varied between a state in which sound energy generated by the loudspeaker unit in the internal cavity can be emitted to the surroundings via the acoustic element and a state in which sound energy is substantially prevented from entering the surroundings via the acoustic element.

Claims18

Dependent claims

A loudspeaker device comprising:

a loudspeaker unit comprising a diaphragm with a first and second surface and an enclosure in which the loudspeaker unit is mounted such that the first surface of the diaphragm is in acoustic communication with the surroundings of the loudspeaker device;
an internal cavity formed in the enclosure and being in acoustic communication with the surroundings of the loudspeaker device via an acoustic element;
wherein the second surface of the diaphragm is in acoustic communication with the internal cavity;
wherein the acoustic element can be varied between a state in which sound energy generated by the loudspeaker unit in the internal cavity can be emitted to the surroundings via the acoustic element and a state in which sound energy is substantially prevented from entering the surroundings via the acoustic element;
wherein the loudspeaker device is provided with digital signal processing (DSP) filter means that interacts with the opening/closing of the acoustic element, whereby different filter adjustments can be applied to the input signal to the loudspeaker device dependent on whether the acoustic element is in an open or closed state.

2 more elements

A method for improving the sound quality especially at low frequencies of a loudspeaker device, which method comprises:

providing a loudspeaker device comprising a loudspeaker unit having a diaphragm with a first surface and a second surface, wherein the loudspeaker unit is mounted in an enclosure having an internal cavity such that the first surface of the diaphragm radiates sound energy into the surroundings of the enclosure and the second surface of the diaphragm radiates sound energy into the interior cavity of the enclosure, and wherein the interior cavity is acoustically connected to an opening in the enclosure such that sound energy can enter the surroundings of the enclosure through the opening, wherein the acoustic connection takes place through an acoustic element in which the acoustic element is configured such that the acoustic element can block or open the acoustic connection from the internal cavity to the surroundings;
providing activating means configured to block or open said acoustic connection from the internal cavity to the surroundings;
setting a threshold value that defines whether the activating means shall block or open the acoustic connection from the internal cavity to the surroundings;
providing means for determining if said threshold value is exceeded;
if the threshold value is not exceeded, place the acoustic connection in the blocked state;
if the threshold value is exceeded, place the acoustic connection in the open state.

3 more elements

Dependencies are inferred from the claim text.

Loudspeaker Enclosure with Closeable Port

Life of this patent

Loudspeaker Enclosure with Closeable Port

Life of this patent

Abstract

Claims18