Speaker device, audio control device, wall attached with speaker device

Abstract

Disclosed is a speaker (10) provided with a speaker unit (20), a passive radiator (50x) which is disposed on the front side of the speaker unit (20), and a cabinet (30) which is attached with the speaker unit (20), covers the rear side of the speaker unit (20), and is configured so that the space (30x) between the speaker unit (20) and the passive radiator (50x) is hermetically sealed, wherein the effective diaphragm area (50L) of the passive radiator (50x) is larger than the effective diaphragm area (20L) of the speaker unit (20).

Description

technical field [0001] The present invention relates to a sound control device, and more particularly, to a sound control device using a speaker of a size capable of being embedded in a wall or partition to reduce noise and improve music effects (presence, sound quality, etc.). And more specifically, it relates to a sound control device that can control the sound immediately in front of the speaker, and also conducts acoustic and electrical studies to suppress the amount of computation to a small amount when controlling the entire wall or partition. As a result, , can secure a wider control area surrounded by walls or partitions with less calculation load. Background technique [0002] For example, as a method of reducing uncomfortable noise, there has been an idea of ​​so-called active noise control that cancels noise by controlling speakers to reproduce sounds of opposite phases. There are examples of applications of active noise control in a restricted one-dimensional sp...

AI Technical Summary

Problems solved by technology

[0092] The first problem is that as the noise reduction amount and the noise reduction area increase, the number of speakers and the number of error microphones increase, resulting in a large amount of control calculation

[0093] The second problem is that in the case of installing the speaker on the wall, when the thickness of the speaker is thick, there is a thickness of the entire wall including the speaker (refer to Figure 22a 1001L), or the problem that it cannot be stored in a normal standard wall even if it is intended to be stored in the wall.

As a result, there is nothing to do but shrink the room

In addition, a thicker speaker generally becomes larger vertically and horizontally as a whole, and as a result becomes heavier.

The strength of the wall also becomes an issue when multiple such heavier speakers are installed in the wall

[0094] The third problem is that when the error microphone is placed at an extremely close distance to the speaker, the sound radiated from the speaker does not become a plane wave, but a spherical wave

[0129] (2) At the very close distance of the speaker, the wave surface is uneven. In order to make the wave surface uniform, it is necessary to increase the speaker diameter.

[0133] Here, according to (2), if a loudspeaker with a large diameter is used, the number of the loudspeakers can be reduced, and the amount of computation can be reduced, but the loudspeaker with a large diameter will encounter the following problem, that is, the thickness of the loudspeaker with a large diameter is usually thicker, It cannot be stored inside the wall, or due to the increase in weight, the wall is required to bear the rigidity of the weight (that is, the normal wall cannot bear the weight), etc.

[0134] In this way, if some research is not carried out, although the amount of calculation can be suppressed according to the existing method, it is difficult to satisfy all of (1), (2) and (3), and as a result, the intended noise control and audio field control cannot be exerted. Effect

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