JPS6143360Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a speaker device with a plurality of built-in speakers, and in particular, a speaker device configured so that two different types of sounds can be heard over the entire circumference using one speaker box. Regarding.

Generally, when listening to stereo playback sound, two speaker devices are installed, one for the right channel and the other for the left channel, and each speaker device receives a right channel audio signal and a left channel audio signal. to supply. In such cases, the sound emission directional characteristics of the speaker devices are usually such that the sound is emitted toward the front, and the area where the stereo playback sound can be heard is limited to only the area in front of both speaker devices. Therefore, the installation location of the speaker device or the listening area is restricted.

In order to resolve this inconvenience, it is possible to use omnidirectional speakers, but in that case, an area where stereo reproduction sound can be heard can also be obtained at the rear of the speaker device. This inevitably creates areas where stereo playback sound cannot be heard, and in order to provide omnidirectionality, it is necessary to use a large number of speakers in one speaker device, which is not a practical solution. .

The purpose of the present invention is to practically eliminate the above-mentioned inconveniences by providing an improved speaker device which can obtain stereophonic sound from a single speaker device and in which the area in which this stereophonic sound can be heard can be obtained in all directions around the speaker device.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the external appearance of an example of a speaker device according to the present invention, FIG. 2 is a side sectional view of the example shown in FIG. 1, and FIG. 3 is a -
It is a sectional view in a line part. In each figure, 1 is a speaker box made of hard material. The speaker box 1 has an approximately cylindrical outer shape, and a recess 2 is formed on the upper side of the cylindrical speaker box, and a recess 3 having the same shape as the recess 2 is formed on the lower side. A reflection 1', which will be described later, is formed at the intermediate portion between the recess 2 and the recess 3. Then, approximately at the center of the bottom surface (located above) of the recess 3, there is, for example, a first channel to which the audio signal of the right channel is supplied.
A speaker 6 is fixed with the sound emitting surface 6' facing upward. Furthermore, a second speaker 7 to which a left channel audio signal is supplied, for example, is fixed to the substantially center of the bottom surface of the recess 2 with the sound emitting surface 7' facing downward. Next, to explain the details of the reflecting section 1', this reflecting section 1' has first openings 4, 4', 4'' communicating with the sound emitting surface 6' of the first speaker 6, and a second Two systems of openings are formed: second openings 5, 5', 5'' communicating with the sound emitting surface 7' of the speaker 7, and these openings 4, 4', 4'' and 5,
5' and 5'' are arranged radially so that the communication paths of the respective systems do not coincide with each other, and open alternately into six parts of the outer circumferential surface of the speaker box 1.

Therefore, when the right channel audio signal is supplied to the first speaker 6, the sound waves emitted from the sound emitting surface 6' of the first speaker 6 in the direction of the solid arrow P are transmitted through the three openings 4, 4', 4. '' is emitted as a sound wave in the direction of the solid arrow A. On the other hand, when the left channel audio signal is supplied to the second speaker 7, a sound wave is emitted from the sound emitting surface 7' of the second speaker 7 in the direction of the dashed arrow Q. is emitted from the three openings 5, 5', 5'' as sound waves in the direction of the broken line arrow B. This results in
Different sound waves are radiated in each direction of the outer peripheral side of the speaker box 1 divided into six parts.

In this state, for example, if the listener is located at point X in Figure 3, the sound waves emitted from the listener's right side by the first speaker 6 corresponding to the right channel of the stereo will be transmitted through the aperture. The sound emitted through the opening 5'' can be heard from the left side of the listener, and the sound emitted from the second speaker 7 corresponding to the left channel of the stereo can be heard from the left side of the listener. When the listener is located at point Y in FIG. The listener can hear the sound from the left side of the listener as sound waves emitted from the first speaker 6 corresponding to the right channel of the stereo are emitted through the opening 4.
When listening at point Y in FIG. 3, the stereo right channel and left channel are swapped compared to listening at point X in FIG. 3, but this does not pose much of a problem in practice. In this way, stereo reproduced sound can be heard at positions around the entire circumference of the speaker box 1.

In the above-mentioned embodiment, the stereo reproduction sound can be heard through the openings which are divided into six parts on the outer peripheral side of the speaker box 1. In this case, instead of the above-mentioned reflecting part 1', a reflecting part 1 as shown in FIG.
A configuration having 0 may be used. That is, the reflecting section 10
The frame body 11 has a frame body 11 corresponding to the ridgeline portion of a virtual cube, and a wall portion 12 divided into a plurality of parts is arranged inside the frame body 11. This wall portion 12 is connected to the frame body 11
In each of the six faces of the virtual cube formed by the above-mentioned virtual cube, a quadrangular pyramidal concave portion constituting an opening is formed such that its apex coincides with the center of the virtual cube. As a result, when a sound wave is incident from the upper surface of the frame 11 of the reflection section 10 toward the center of the frame 11, it is reflected by the upper surface of the wall 12, divided into two, and the frame that is the opening is The light is radiated from the two surfaces of the body 11 in the direction of arrow a and the direction of arrow b. Further, when a sound wave is incident from the lower surface side of the frame body 11 toward the center of the frame body 11, it is reflected by the lower surface side of the wall portion 12, and is divided into two, and the frame body that is the other opening is reflected. From the other two surfaces of 11, in the direction of arrow c and arrow d
It will be emitted in the direction. Therefore, a first speaker is provided on the upper surface side of the frame 11, and a second speaker is provided on the lower surface side, and a stereo right channel audio signal is supplied to the first speaker, and a stereo right channel audio signal is supplied to the second speaker. When the left channel audio signal is supplied, sound waves corresponding to the right channel and left channel audio signals are alternately radiated from the openings that divide the outer circumferential side of the reflecting section 10 into four.

Such a reflecting section 10 is attached to a speaker box (not shown), and first and second speakers are installed above and below the reflecting section 10, respectively, so that their sound emitting surfaces face each other with the reflecting section 10 in between. If installed in this manner, the speaker device will have a stereo sound emitting area divided into four parts of the circumference.

In the above two embodiments, the first and second
The speakers correspond to the right channel and left channel of the stereo, respectively, and the first and second speakers are speakers that cover the entire right channel and left channel audio frequency bands, so-called full-range speakers. However, since the low frequency range has poor sound source directionality, a bass range dedicated speaker that reproduces only the low frequency range is additionally installed, and this speaker is responsible for reproducing the low frequency range of both channel audio signals, thereby improving the sound source directionality. The first and second speakers may be responsible for reproducing only excellent mid-to-high frequency ranges. In this case, as shown in FIG.
A speaker 24 dedicated to low frequency range may be arranged below the speaker 3 so that its sound emitting surface faces downward.

Furthermore, in order to disperse the sound waves emitted from the speaker 24 dedicated to the low frequency range to the surroundings, a conical or pyramidal reflecting member 25 as shown in FIG. 6 may be additionally provided.

As is clear from the description of each of the embodiments described above, according to the present invention, the first and second speakers to which mutually different audio signals are supplied, such as the audio signals of the right channel and left channel of a stereo, are respectively provided. A plurality of first openings communicating with the radiation surface of the first speaker and a plurality of second openings communicating with the radiation surface of the second speaker are arranged such that the sound emission surfaces of the speakers face each other, and the plurality of first openings communicate with the radiation surface of the second speaker. Since the speaker device is constructed by disposing the speakers alternately around the facing parts of the sound emitting surfaces of the two speakers, when a stereo audio signal is supplied, it is possible to listen to the stereo playback sound just by using two speakers. The area can be obtained around the entire circumference of the speaker device. Further, since the speaker device according to the present invention can be miniaturized, it is suitable for use as a ceiling-hanging speaker device, etc.

Note that each of the above embodiments is a case in which two speakers are configured to correspond to a stereo right channel and a left channel, respectively, but the speaker device according to the present invention is not limited to stereo sound reproduction. The two speakers may be configured to correspond to, for example, a monaural high range and a middle/low range, in which case a spacious monaural sound is reproduced.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the appearance of an example of a speaker device according to the present invention, FIG. 2 is a side sectional view of the example shown in FIG. 1, and FIG. 3 is a -
4 is a perspective view showing a different example from the example shown in FIG. 1 of the reflective section of the speaker device according to the present invention, and FIG. 5 is a perspective view showing another example of the speaker device according to the present invention. FIG. 6 is a schematic diagram showing still another example of the speaker device according to the present invention. In the figure, 1', 10, 22 are reflective parts, 4, 4',
4'' is the first opening, 5, 5'5'' are the second openings, 6 is the first speaker, 6', 7' are the sound emission surfaces, 7
is the second speaker.

Claims (1)

[Scope of utility model registration request] a plurality of first openings communicating with the sound emitting surfaces of the first speakers, comprising first and second speakers arranged with respective sound emitting surfaces facing each other and to which mutually different audio signals are supplied; and a plurality of first openings communicating with the sound emitting surfaces of the first speakers. and a plurality of second openings communicating with the sound emitting surfaces of the second speaker, which are arranged alternately around opposing portions of the sound emitting surfaces of the first and second speakers. .