Loudspeaker device

Abstract

The present invention relates to a loudspeaker device, comprising first and second closely located and individually acoustically isolated loudspeaker elements. The first and second elements are arranged to receive a first signal and a second signal, respectively, at least part of said first signal being in anti-phase relative to said second signal. The device further includes third and fourth loudspeaker elements, being located in close proximity to said first and second loudspeaker elements, respectively. The centre of said third loudspeaker element is located such that a first axis intersecting the centre of said first loudspeaker element and the centre of said third loudspeaker element is inclined an angle f relative to a horizontal plane, f being in the range 0 DEG - + 30 DEG , and the centre of said fourth loudspeaker element is located such that a second axis intersecting the centre of said second loudspeaker element and the centre of said fourth loudspeaker element is inclined at an angle cp relative to a horizontal plane, f being 0 DEG - +- 30 DEG . The first and second signals to said third and fourth loudspeaker elements, respectively, are low-pass filtered, the cut-off frequency of said low-pass filters being less than or equal to 2.5 kHz.

Description

technical field [0001] The invention relates to loudspeaker devices for reproducing stereophonic audio signals. In particular, the invention relates to a loudspeaker arrangement according to the preamble of claim 1 . The invention also relates to a stereophonic audio reproduction system according to claim 19 . Background technique [0002] In the past, expectations for reproduced sound were no greater than what monophonic reproduction could produce, and so this satisfied most listeners. However, over time, the demand for high-quality reproduction of stereo sound (for example, recordings from a recording studio or recordings from live concerts) has increased. [0003] Accordingly, various systems have been developed, each capable of reproducing true stereo to a greater or lesser extent. [0004] The easiest system to think of is the traditional stereophonic reproduction system in which left and right speakers are arranged in front of the listener and separated by a certain...

AI Technical Summary

Problems solved by technology

[0007] However, a problem with such systems with closely arranged loudspeaker units is that, as the distance between the loudspeaker units and the listener increases, the performance of the system with respect to the fidelity of the stereophonic effect perceived at the listener's position increases with distance. decreases with increasing and in extreme cases disappears altogether

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