JPS6079900A - Speaker device - Google Patents

Abstract

PURPOSE:To obtain excellent reproducing sound rich in the presence by directing a major axis of a speaker for reproducing direct sound to a listner and directing a major axis of two speakers for reproducing indirects sound upward with a tilt in opposite side to the listner through the arrangement of the speakers. CONSTITUTION:The direct sound reproducing speaker 1 is arranged while directing the major axis of the speaker 1 along the X axis and the indirect sound reproducing speakers 2a, 2b are arranged while directing the major axis of the speakers 2a, 2b along axes tying O, P1 and O, P2. When the speaker 1 is directed to a listner placed in front of the speaker 1, the speakers 2a, 2b are arrnged so that the major axis are directed upward with a tilt in opposite side to the listener. The arranging angle of the speaker 2a is 39 deg. for angle alpha and 245 deg. for angle beta and the arranging angle of the speaker 2b is 39 deg. for angle alpha and 115 deg. for angle beta.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker device, comprising a speaker for direct sound reproduction and at least two speakers for indirect sound reproduction, the main axis of the speaker for direct sound reproduction facing toward a listener. and the main axes of the two indirect sound reproducing speakers are substantially symmetrical to each other with respect to the main axis of the direct sound reproducing speaker, and the main axes of the two indirect sound reproducing speakers are aligned with the listener. The direct sound reproducing speaker and the indirect sound reproducing speaker are arranged so as to be diagonally upward on the opposite side, and the sum volume emitted from the direct sound reproducing speaker and the indirect sound reproducing speaker is kept almost constant. By providing a volume controller that increases or decreases the radiated sound volume, it is possible to provide a speaker device that can provide excellent reproduced sound rich in the sense of presence, spaciousness, and depth found in stereo playback, for example. purpose.

Stereo playback devices generally tend to be smaller; for example, stereo radio cassettes are becoming popular, and when playing classical music etc. with such playback devices, you can enjoy the realistic feeling of being in a concert hall. It is almost impossible to feel a sense of spaciousness or depth (distance). and,
It has become clear that in order to achieve this kind of effect, it is necessary to increase the indirect volume. It has also been found that, for example, if you want to make vocal sounds stand out clearly, you can reduce the indirect volume. In any case, in order to obtain these effects, it is necessary to be able to freely increase or decrease the amount of indirect sound. The inventor of the present invention has focused on the fact that the amount of indirect sound is related to changes in the directivity of the speaker, and has developed a speaker device that can obtain excellent reproduced sound by controlling the directivity of the speaker.

Embodiments of the speaker device according to the present invention will be described below.

FIG. 1 is an explanatory diagram for explaining the schematic configuration of a speaker device according to the present invention.

In the figure, 1 is, for example, a horn speaker for reproducing a medium range, that is, a speaker for reproducing direct sound, and 2a and 2b are, for example, speakers for reproducing a whole range, that is, speakers for reproducing indirect sound.

The above speaker 1 for direct sound reproduction and speaker 2 for indirect sound reproduction
a and 2b are arranged with the main axis of the speaker 1 for direct sound reproduction along the X axis (front) in FIG. The connecting axis and 0. They are arranged along the axis connecting P2.

That is, when the direct sound reproduction speaker 1 is directed toward a listener located in front, the indirect sound reproduction speakers 2a, 2
The main axes (0, P, axes) and (0, P2 axes) of b are arranged so as to face diagonally upward, opposite to the listener side.

By the way, the arrangement angle in this embodiment of the above-mentioned indirect sound reproducing speakers 2a and 2b is that the left indirect sound reproducing speaker 2
For a, the a angle in the figure is 39° and the β angle is 245°, and for the indirect sound reproduction speaker 2b on the right side, the α angle is 39° in the figure.
, the β angle is set to 115°.

Similarly, the coordinate positions of P and P2 of the main axis (0, P, ), (o, p2) along which the left and right indirect sound reproduction speakers 2a and 2b are along are P+-("+ Y+z), P2= (-x
, y, z).

Figures 2a, b, and c are a perspective view and a partially cutaway side view showing a configuration in which the direct sound reproduction speaker 1 and the indirect sound reproduction speakers 2a and 2b explained in Figure 1 are incorporated into a predetermined enclosure. be.

In the figure, 3 is a direct sound enclosure into which the direct sound reproduction speaker 1 is incorporated. By the way, this direct sound enclosure 3 has a tweeter (not explained in FIG. 1).
A high frequency range reproduction speaker) 4 and an UNO (low frequency range reproduction speaker) 5 are incorporated as shown in the figure.

Further, in the figure, 6 is a speaker 2a for indirect sound reproduction.

This is an indirect sound enclosure in which 2b is incorporated at the main axis angle explained in FIG.

As shown in Figure 2C, the direct sound enclosure 3 and the indirect sound enclosure 6, which are constructed separately, are connected to the indirect sound enclosure 3 by a protrusion 7 protruding from the top surface of the direct sound enclosure 3, as shown in Fig. 2C. A recess 8 formed in the lower surface of the sound enclosure 6 is fitted to assemble the indirect sound enclosure 6 positioned above so as to be rotatable left and right.

FIG. 3 shows the directivity pattern in the midrange of the speaker device having the above configuration.

In the figure, area B surrounded by a two-dot chain line indicates the directivity of the speaker 1 for direct sound reproduction, and area A surrounded by a one-dot chain line indicates the directivity of the speaker 1 for direct sound reproduction.
shows the directivity of the left and right indirect sound reproduction speakers 2a and 2b.

Incidentally, the directivity area B and area A of the direct sound reproduction speaker 1 and the indirect sound reproduction speakers 2a and 2b can be varied within the range shown in the figure.

That is, the range of both areas A and B can be varied from zero to the maximum or from the maximum to zero by changing the volume of each of the direct sound reproduction speaker 1 or the indirect sound reproduction speakers 2a and 2b. .

For example, in the figure, if the volume of the indirect sound reproduction speakers 2a and 2b is reduced to approach zero in order to make the directivity of area A zero, only the directivity area B due to the direct sound reproduction speaker 1 will be left. Also, conversely, indirect sound reproduction speaker 2
When the volume of the speakers a and 2b is maximized and the volume of the speaker 1 for direct sound reproduction is decreased to approach zero, a directional area A is formed only by the speakers 2a and 2b for indirect sound reproduction. That is, as in the former case, if there is only the directivity area B due to the direct sound reproduction speaker 1, the directivity 11 is very narrow;
It has the effect of making the sound stand out clearly. Therefore, it is convenient for listening to vocal music, for example. On the other hand, as in the latter case, if only the directivity area A is caused by the indirect sound reproduction speakers 2a and 2b, the directivity is 1.
The sound is extremely spacious and has the effect of giving the sound a sense of spaciousness. Therefore, it is convenient when listening to Kranzke music, for example.

Areas B/ and h/ shown surrounded by solid lines in the same figure are the speakers 1 for direct sound reproduction and the speakers 2a and 2b for indirect sound reproduction.
This shows the directivity pattern when both are operated together and an intermediate volume is obtained from each.

Figure 4 shows each orientation and raw area A shown in Figure 3.
, B to A/ , B/ is shown as an example of volume control for varying it.

In the figure, 9 is a main amplifier, 10 is a volume controller, 11 is a volume controller for the direct sound reproduction speaker 1, 12 is a volume controller for the indirect sound reproduction speakers 2a and 2b, and the volume controller is 10 includes two independent switches 10a, 1Qb, two interlocking switches IOC and 10d, and a volume adjuster 13.1.
For example, when the independent switch 10a is closed, a desired audio signal is applied from the main amplifier 9 to the sound reproduction speaker 1 via the volume controller 13 and the volume controller 11 in series, When the independent switch 10b is closed, the main amplifier 9 switches to the volume controller 14 and the volume controller 1.
A desired audio signal is applied to the indirect sound reproduction speakers 2a and 2b through the speakers 2a and 2b in series. The independent switches 10a and 10b are constructed so that when one is closed, the other is always open. Further, when the interlocking switch IOC, 10d is closed, both the independent switches 10a, 10b are opened, and the main amplifier 9, the volume controller 13.14, and the volume controller 11.
Desired audio signals are applied to the direct sound reproduction speaker 1 and the indirect sound reproduction speakers 2a and 2b through the respective speakers 12.

The above description shows an example of volume control for the left channel in a stereo playback device, for example, but since the right channel also has a similar configuration, the explanation will be omitted in this embodiment.

FIGS. 5a, b, and c show the structure of an attenuator that can adjust the volume of the left and right channels in conjunction with each other, and the relationship between the volume and the sound pressure level when the volume is controlled using this attenuator.

FIG. 5a shows the volume controllers VR, , VR, , vRl, v
n.

are connected in series to form an attenuator.

In this attenuator, the volume adjuster Vll, ,
VR, 3 is the left channel, volume adjuster VR, 2
゜With VR and A as the right channels, the respective outputs are taken out at L and R as shown in the figure, and for example, the audio signals of the volume controllers VR, VR3 are output to the direct sound reproduction speaker 1 and the indirect sound in Fig. 4. When applied to the reproduction speakers 2a and 2b, the volume adjuster 13 in the configuration shown in FIG.
14, these rain volume adjusters can be replaced as 13. , 14 can achieve exactly the same effect. Similarly, the attenuator volume controller VR2,
Although the audio signal of VR is not explained in FIG. 4, if it is applied to a similarly configured volume control circuit, it is possible to obtain the same effect as obtained with the left channel.

FIG. 5 bld is a detailed external view of the attenuator having the above configuration.

111, VR, VR2, VR, 3, VR4 are in the same figure a
These are the volume adjusters explained in 15, and 15 are the volume adjusters VB, , VR, , VR3, VR,'! i
= A knob portion that changes the interlocking Li.

In FIG. 5C, for example, the volume controllers VR, VR3 for obtaining the left channel audio output of the attenuator are replaced with the volume controllers 13 and 14 in FIG. 4, and the speaker 1 for direct sound reproduction and the speaker 2a for indirect sound reproduction are , 2b is a graph showing the state when the volume is adjusted.

By the way, as mentioned above, it should be noted that the directivity pattern of the entire speaker device can be varied best by setting the direct volume of the speaker 1 for direct sound reproduction and the indirect volume of the speakers 2a, 2b for indirect sound reproduction so that they are inversely proportional. The volume controllers VR, , VR, of the attenuator are set so that the audio output signal ratio is inversely proportional.

That is, when the output of the volume controller VR is at the maximum, the output of the other volume controller VR3 is set to be the minimum.

In the graph, if we take the rotation angle of the volume controllers VR, VB2 horizontally and the sound @ (sound pressure) level vertically, the volume level taken out from the side volume controllers VR,, V& is as shown in the graph. The result is as shown in .

That is, if the output shown by the one-dot chain line is the volume controller V
Direct sound reproduction speaker 1 adjusted and taken out by R.
, and the output indicated by the dotted line is adjusted by the volume controller VRa and output from the indirect sound reproduction speakers 2a, 2.
Assuming that the volume is b, it will be understood that when one volume indicates 1, the other volume indicates 0. Looking at this in terms of the rotation angle of the knob 15, when the rotation angle is the minimum, the volume of the direct sound reproduction speaker 1 is 1, and when the rotation angle is %, the volume of the direct sound reproduction speaker 1 is 0.5. When the rotation angle reaches the maximum, the volume of the direct sound reproduction speaker 1 becomes O. On the other hand, since the volume of the indirect sound reproduction speakers 2a, 2b adjusted by the volume adjusters Vll, 3 is set to be inversely proportional to the volume of the direct sound reproduction speaker 1, the rotation angle of the knob 15 is It will increase from 0 to 1 as it is rotated from the minimum to the maximum.

The solid line S in the figure indicates the total sound pressure level of both volumes obtained by the direct sound reproducing speaker 1 and the indirect sound reproducing speakers 2a and 2b. As can be understood from the figure, the sound pressure level is always maintained at a constant value even if the volume obtained by the two speakers 1, 2a, and 2b changes. Therefore, the listener can always control the volume ratio of direct sound and indirect sound in a sound field with a constant sound pressure level, that is, change the directivity of the speaker device and listen to desired music.

FIGS. 6a and 6b show a state in which desired stereo reproduction is performed by a stereo reproduction apparatus equipped with the above-mentioned speaker device.

In the figure, 16 is a stereo playback device, R is a right channel speaker device, L is a left channel speaker device, 17
is the listener, 18 is the wall, and 19 is the ceiling.

When the stereo playback device 16 is activated and stereo playback starts under the situation shown in the figure, the left and right speaker devices ■1. The direct sound emitted from the direct sound reproduction speaker 1 at R is
It will directly reach the listener 17 located in front.

On the other hand, the indirect sound emitted from the indirect sound reproduction speakers 2a and 2b in the left and right speaker devices I, , and R is as follows.
As shown in FIGS. 6a and 6b, once the light hits a wall 18 or ceiling 19, it is reflected by these walls 18 or ceiling 19 and reaches the listener 17.

” = If, for example, the aforementioned attenuator is operated to increase the volume of the direct sound emitted only from the direct sound reproduction speaker 1, only the direct sound will reach the listener 17. Therefore, both speaker devices TL and L
The directivity of the beam reaches area B shown in FIG. Therefore, the stereo sound reproduced by the stereo reproduction device 16 will be viewed by the listener 17 in a clear and distinct manner. This type of sound field can be said to be the most convenient sound field for listening to so-called acoustic music.

Further, in contrast to the above situation, if only indirect sound is emitted from the left and right speaker devices R, the directivity of both speaker devices 'f and Jt becomes area A shown in FIG. Therefore, the stereo sound reproduced by the stereo reproduction device 16 is heard by the listener 17 as a sound having an extremely wide sense of expansion or depth. This type of sound field can be said to be the most convenient sound field for listening to so-called classical music.

By the way, above we have explained the directivity using only direct sound or only indirect sound, but by using the attenuator explained in Figure 5, it is possible to set up a sound field in which both direct sound and indirect sound are radiated. When a listener desires stereo reproduction that suits such a sound field, it is possible for the listener to freely create the desired stereo reproduction.

Moreover, the above speaker device R mountain is the speaker 2 for indirect sound reproduction.
Indirect sound enclosure 6 incorporating a and 2b, respectively
As shown in FIG. 2, the direct sound enclosure 3 incorporating the direct sound reproduction speaker 1 is assembled so as to be freely rotatable, so depending on the structure of the wall 18, for example, the indirect sound enclosure 6 may be It is also possible to effectively obtain indirect sound by changing the angle to a desired angle.

FIG. 7 shows another embodiment of the speaker device according to the present invention.

In other words, in the speaker device according to the first embodiment described above, the direct sound reproduction speaker 1 is connected to the direct sound enclosure 3.
In this embodiment, the indirect sound reproduction speakers 2a and 2b were independently incorporated into the indirect sound enclosure 6 and configured to be divisible. However, the speaker device according to this embodiment has a single enclosure 20, and the indirect sound reproduction reproduction speaker 2a,
2b and the direct sound reproduction speaker 1 are each incorporated to form a consummate structure. Therefore, although it is not possible to adjust the angle of the indirect sound enclosure 6 with respect to the wall etc. of the speaker device described in the first embodiment, it is possible to downsize the speaker device and reduce the cost of the speaker device itself by reducing the number of component parts. can. Moreover, because of its small size, it is easy to transport and is very convenient to handle.

In the figure, reference numeral 21 is a sound absorbing material for reducing the influence of each speaker, for example, in the middle and high range.

By the way, in the first and second embodiments, the arrangement angles of the indirect sound reproduction speakers 2a and 2b with respect to the direct sound reproduction speaker 1, that is, the angles in the diagonal upward direction, are set as an a angle of 39 degrees and a β angle of 115 degrees and 245 degrees. As explained above, these β angles and β angles are set as an example of angles that are considered to be the best experimentally. β angle (10°~80°)
, β angles (190° to 260° for speaker 2a and 100° to 170° for speaker 2b) are considered to have sufficient effects, so the angles are limited to those set in the previous embodiment.

isn't it.

Also, in the volume control in Figs. 4 and 5, for example, I did not explain at length how to install the attenuator.
The attenuator portion may be extended to the listener's hand so that it can be remotely controlled, or an optical control or radio control type may be adopted, and there is no particular limitation.

As described above, the speaker device according to the present invention includes a speaker for direct sound reproduction and at least two speakers for indirect sound reproduction, and is arranged so that the main axis of the speaker for direct sound reproduction faces the listener side. The main axes of the two indirect sound reproduction speakers are substantially symmetrical with respect to the main axis of the direct sound reproduction speaker, and the main axes of the two indirect sound reproduction speakers are diagonally opposite to the listener. Furthermore, the sum of the volume radiated from the direct sound reproduction speaker and the indirect sound reproduction speaker is kept almost constant to reduce the radiated volume of the direct sound reproduction speaker and the indirect sound reproduction speaker. Since it is equipped with a volume controller that allows you to easily adjust the volume, it has the following features: when playing stereo, you can obtain excellent playback sound that is rich in realism, expansion, and power.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the arrangement relationship between a speaker for direct sound reproduction and a speaker for indirect sound reproduction of a speaker device according to the present invention, and FIG.
Figure a is a front perspective view of the speaker device according to the first embodiment, Figure C is a rear perspective view of the same speaker device, Figure C is a partially cutaway side view of the same speaker device, and Figure 3 is a front perspective view of the speaker device according to the first embodiment. The directivity pattern of the speaker device according to the invention, FIG. 4 is a volume control circuit diagram of the speaker device according to the invention, FIG. FIG. 6C is a graph showing the sound ratio and sound pressure level of direct sound and indirect sound, and FIG. 7 is a side view of the sound field, and FIG. 7 is a partially cutaway perspective view showing a second embodiment of the speaker device according to the present invention. DESCRIPTION OF SYMBOLS 1...Speaker for direct sound reproduction, 2a, 2b...Speaker for indirect sound reproduction, 10...Volume controller, 17...
listener. Patent Applicant: Victor Company of Japan Co., Ltd.

Claims (1)

[Claims] A speaker for direct sound reproduction and at least two speakers for indirect sound reproduction, arranged so that the main axis of the speaker for direct sound reproduction faces the listener side, and the two speakers for indirect sound reproduction The main axes of the two speakers for indirect sound reproduction are substantially symmetrical to each other with respect to the main axis of the speaker for direct sound reproduction, and the main axes of the two speakers for indirect sound reproduction are arranged diagonally upward on the side opposite to the listener, and further, Equipped with a volume controller that increases or decreases the radiated volume of the direct sound reproducing speaker and the indirect sound reproducing speaker while keeping the sum of the volume radiated from the direct sound reproducing speaker and the indirect sound reproducing speaker almost constant. A speaker device featuring: