JPH0357399A - speaker network - Google Patents

Abstract

PURPOSE:To easily correct a sound pressure frequency characteristic at a low frequency of a speaker placed at an optional position by using a switch so as to select 2 kinds of network circuits or over with a different cut-off frequency. CONSTITUTION:When a speaker approaches a wall, the sound pressure at a specific frequency is increased more than the case of parting the speaker from the wall and the sound balance is deteriorated. Thus, a low frequency network 11 is set lower than the cut-off frequency of a low frequency network 12 and a switch 13 is used to select either the network 11 or 12 depending whether the speaker 15 is parted from the wall or close to the wall. Moreover, the cut-off frequencies of 2 kinds or over may be provided to an intermediate and high frequency network. Thus, the sound pressure frequency characteristic of the speaker at a low frequency placed at an optional position is easily corrected.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a nuveka system used as an indoor and outdoor sound reproduction device.

BACKGROUND OF THE INVENTION In recent years, due to the trend toward lighter, thinner, and smaller speakers, speakers that do not require a large installation area have been developed. Among these, there is a speaker system that reproduces a low distortion and plane wave-like sound field by reducing the depth and increasing the area of the diaphragm.

Hereinafter, the conventional speaker system as described above will be explained with reference to the drawings.

FIG. 6 is a perspective view showing an example of a speaker system. As shown in FIG. 8, 1 is a cabinet, 2a and 2b are low-range speakers, and 3 is a medium-high range speaker. The low range speakers 2a, 2b and the middle and high range speakers 3 are in the cabinet 1.
is fixed. FIG. 7 is a circuit diagram showing a signal path of a conventional speaker network. 4 is an input terminal, 6 is a basic network circuit diagram, 6 is a treble speaker,
7 is a mid-range speaker, and 8a and 8b are low-range speakers. The input of the network 6 is connected to the input terminal 4. At the output end of Nenotowork 6, Nupica 6, 7, 8
a and 9b are connected.

The operation of the speaker system configured as described above will be described below.

The AC electrical signal input to the input terminal 4 is input to the network 5 and demultiplexed. Speakers suitable for reproducing signals separated into each frequency band are connected to the output end of the network 6, and sound is radiated from these speakers. At this time, each element constant of the network 6 is determined according to the impedance and cutoff frequency of the speaker connected to the output terminal.

Problems to be Solved by the Invention However, with the above configuration, the sound quality may deteriorate due to changes in the sound pressure frequency characteristics around the crossover frequency between the middle and low frequencies, which occurs depending on the location where the speaker system is installed. Ta. To avoid this, it was necessary to find an appropriate location and install the speakers.

In view of the above problems, the present invention provides a speaker network that can easily correct low-range sound pressure frequency characteristics so as not to deteriorate the sound quality of speakers installed at arbitrary positions.

Means for Solving the Problem In order to achieve this object, the speaker of the present invention has two or more types of low-pass fino letter cutoff frequencies, and is equipped with a switch for selecting and setting them, so that the speaker can be easily set. It is something that can be switched.

Function: With this configuration, it is possible to prevent deterioration in sound quality due to the speaker installation location by changing the cutoff frequency of the low-pass filter in the low range with a switch.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a speaker network according to a first embodiment of the present invention, and FIG. 2 is a perspective view showing an example of speaker installation. In Figure 1, 9 is the input terminal, 10 is the middle/high band network, 11 is the first low band network,
12 is a second low-band network, 13 is a path switch, 14 is
1 is a mid-high range speaker, and 16 is a low range speaker. In FIG. 2, 16a and 16b are speakers, and 17a and 17b are walls.

A medium/high band network 10 and first and second low band networks 11.12 are connected in parallel to the input terminal 9, and a switch 13 for selecting the network 11.12 is connected after these networks 11.12. A mid-high frequency speaker 14 is connected to the terminal end of the switch 13, and a low frequency speaker 15 is connected to the terminal end of the switch 13.

The operation of the speaker network configured as described above will be explained below. As shown in Figure 2, considering two installation methods: (a) when the speaker is placed close to the wall, and (b) when the speaker is placed away from the wall, the sound pressure frequency characteristics of these are shown in the fifth example. It is a diagram. When the speaker is brought closer to the wall, the sound pressure at frequency f1 increases, and the sound balance becomes worse than when the speaker is moved away from the wall.

Therefore, by setting the first low frequency network 11 in FIG. , the sound pressure applied to f1 can be corrected to produce a good descending parannu sound.

The second embodiment of the present invention will now be described with reference to the drawings.

FIG. 3 is a block diagram of a speaker network according to a second embodiment of the present invention, and FIG. 4 is a front view and a rear view of the speaker system. In Fig. 3, 18 is an input terminal, 19 is a low-range network, 2) is a first mid-high range network, 21 is a second mid-high range network, 22 is a switch, 23 is a mid-high range speaker, 24 is a low frequency speaker.

In FIG. 4, 25a and 25b are low frequency speakers, 26 is a mid-high frequency speaker, 27 is a switchboard, 28a and b are low frequency speaker input terminals, and 29 is an input terminal and a low frequency network output terminal.

A low-band network 19 is connected to the input terminal 18. First and second medium and high range networks 2). 21 are connected in parallel, and these networks 2). 21 followed by network 2). 21
A switch 22 is connected to select the network 19.
A low frequency speaker 24 is connected to the terminal end of the switch 22, and a middle/high frequency speaker 23 is connected to the terminal end of the switch 22. These networks. The switch is mounted inside the mid-high range speaker cabinet, and this cabinet is externally wired to the low-range speaker input terminal of the independent low-range speaker cabinet and the low-range network output terminal of the mid-high range speaker.

The operation of the speaker network configured as described above will be explained below. As in the first embodiment, by switching the cut characteristics of the low-cut filter section of the mid-high range speaker when the speaker is brought close to the wall and when it is separated from the wall, the increase in sound pressure characteristics that occurs in the low range can be reduced. It can be suppressed and corrected to a well-balanced sound.

As described above, according to this embodiment, by providing a network with two or more types of cutoff frequencies and a switch for switching between these frequencies, it is possible to easily correct the sound pressure balance depending on the location of the speaker. .

Effects of the Invention The present invention provides a speaker network with a low-frequency network having two or more types of cutoff frequencies and a switch for switching between these frequencies. This makes it possible to easily correct changes in sound pressure.

[Brief explanation of drawings]

Fig. 1 is a block diagram of the speaker network that can be pressed in the first embodiment of the present invention, Fig. 2 is a perspective view showing an example of the installation location of the speaker, and Fig. 3 is the speaker network that can be clicked in the second embodiment of the present invention. 0 network 1 lock diagram, Figure 4 is a front view and rear view of the speaker system in the second embodiment, Figure 5 is a sound pressure frequency characteristic diagram in Figure 2, and Figure 6 is an example of the speaker system. The perspective view shown in FIG. 7 is a basic circuit diagram of a conventional speaker network. 9...Input terminal, 1o...Medium/high band network, 11...First low band network,
12...Second low-band network, 13...
...Switch, 14...Mid-high range speaker, 1
6...Low range speaker.

Claims (5)

[Claims] (1) In order to change the sound pressure frequency characteristics at frequencies near the crossover between mid-high range speakers and low range speakers, 2
A speaker network comprising a network circuit having more than one type of cutoff frequency and a switch for switching the cutoff frequency. (2) The speaker network according to claim 1, characterized in that two or more types of cutoff frequencies are provided, especially in a low-frequency speaker network. (3) The speaker network according to claim 1, characterized in that two or more types of cutoff frequencies are provided, especially in the network for medium and high frequency speakers. (4) The speaker system according to claim 1, wherein the mid-high range speaker cabinet and the low range speaker cabinet are independent and separated, and each cabinet is equipped with a network circuit used for each speaker. network. (5) The speaker network according to claim 4, characterized in that a middle/high range and low range network circuit is provided in a cabinet of either a separated middle/high range speaker or a low range speaker.