JPH0132473Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a speaker system that uses a plurality of speakers and whose directivity and sensitivity can be varied depending on the purpose.

The directivity and sensitivity of conventional speakers are determined in advance, and it is impossible to change them.

The present invention was made to solve the above-mentioned drawbacks, and it is possible to arrange an even number (N) of speaker units on the same plane in N pieces vertically and horizontally.
The innermost adjacent speaker units are taken as the smallest unit group, and the ring-shaped adjacent speaker units on the outer periphery are taken as a unit group to form N/2 unit groups up to the outermost periphery, and the speaker units of each unit group are To provide a speaker system in which directivity and sensitivity can be arbitrarily varied by arranging the sound emission directions of the units in opposite directions alternately and configuring the input terminals of each unit group to be arbitrarily connected in parallel. be.

Hereinafter, the present invention will be explained based on the embodiments shown in the drawings. Fig. 1 is a perspective view of the speaker system according to the present invention seen from the front with the protective net removed, Fig. 2 is a perspective view of the speaker system seen from the back, Fig. 3 is a sectional view of the same part, and Fig. 4 is a perspective view of the speaker system according to the present invention as seen from the front. The figure shows the wiring diagram of the same speaker system.

In the drawing, 1 is an even number (N) of speaker units having the same aperture, 2 is a cabinet in which the speaker unit 1 is installed, 3 is a protective net attached to the front of the cabinet 2, and 4 is a directional and sensitive speaker unit. The changeover switch 5 is an input terminal.

The above even number (N) speaker units 1
are regularly arranged on the front surface of the cabinet 2 so that N pieces are arranged vertically and horizontally. and,
The four speaker units 1 adjacent to each other on the innermost periphery are set as the minimum unit group A, and the ring-shaped speaker units 1 adjacent to the outer periphery of unit group A are set as unit group B. Two unit groups C, D... (three unit groups A, B, C in the drawing) are formed. In addition, the speaker units 1 constituting each unit group A, B, C...
As shown in FIG. 3, half of the speaker units 1 are arranged on the same plane so that the alternate sound emission directions are opposite to each other.

Furthermore, the input terminals of the speaker units 1 of each unit group A, B, C, . . . are connected in parallel. Each unit group A, B, C, . . . is connected to an input terminal 5 via a directivity/sensitivity switch 4, as shown in FIG. The changeover switch 4 is of a type that connects one or more unit groups A, B, C, . . . in parallel. 6 is an amplifier.

Next, the operation will be explained with reference to A and B of FIG. First, when only the innermost unit group A is driven, as shown by I in the same figure, in a wide band,
Moreover, good directivity characteristics can be obtained. As the number of unit groups A, B, C, . . . increases to two, three, etc., the frequency band becomes narrower, but the directivity becomes sharper, as shown by the arrows in the figure.

As described above, in the present invention, an even number (N) of speaker units 1 are arranged vertically and horizontally on the same plane, and the innermost adjacent speaker units 1 are defined as the minimum unit unit group A. The speaker units 1 adjacent to each other in a ring shape on the outer periphery are set as a unit group B, and N/2 unit groups C, D,... are formed up to the outermost periphery, and each unit group A, B, C...
The sound emission directions of the speaker units 1 are alternately arranged in opposite directions, and the input terminals of each unit group A, B, C, etc. can be arbitrarily connected in parallel, so the sensitivity and directivity can be adjusted according to the purpose. It can be changed freely.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the speaker system according to the present invention seen from the front with the protective net removed, Fig. 2 is a perspective view of the speaker system seen from the back, Fig. 3 is a sectional view of the same part, and Fig. 4 is a perspective view of the speaker system according to the present invention as seen from the front. The figure shows the wiring diagram of the same speaker system, and A and B in Fig. 5 show the frequency characteristics of the same speaker system. 1...Speaker unit, 2...Cabinet, 4
...Changing switch, A, B, C...unit group.

Claims (1)

[Scope of utility model registration request] An even number (N) of speaker units are arranged vertically and horizontally on the same plane, with the innermost adjacent speaker unit being the smallest unit group, and the adjacent speaker units in a ring shape on the outer periphery. N/2 unit groups are formed up to the outermost periphery, and the sound emission directions of the speaker units 1 of each unit group are arranged alternately in opposite directions, so that the input terminals of each unit group can be connected in parallel as desired. A speaker system characterized by comprising: