JP2010263295A - Speaker device and sound reproducing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker device which reduces adverse effect of a synthetic sound from right and left speakers, and reproduces a sound field in a stereo device with reality. <P>SOLUTION: The speaker device 1 includes: a pair of middle and high range speakers 13a, 13b for right and left channels which are arranged adjacent to each other, a pair of high range speakers 11a, 11b for the left channel and the right channel, a middle and high range signal processing means which outputs middle/high range sound to the middle and high range speakers 13a, 13b, and a high range signal processing means which outputs a high range sound to the high range speakers 11a, 11b in one cabinet 3. The sound field with reality can be reproduced by installing and using the speaker device 1 at the center of right and left main speakers of the stereo device. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a speaker device and a sound reproduction method that reduce the adverse effects of synthesized sound from left and right main speakers and realistically reproduce a sound field in a stereo device.

  All sounds emitted from raw musical instruments are expressed as respiratory waves (spherical waves), with the instrument as the central axis, air is vibrated and the sound is diffused and transmitted in all directions as dense waves . However, when playing back on a stereo device, even if a solo performance is performed with a single instrument, the sound source has two left and right axes. Although the sound image is reproduced, there is only one sound image, and a synthesized sound with different directions to be transmitted will be heard with a low degree of perfection in which the images are combined and localized. The greatest fate is to reproduce it with two speakers on the left and right. With only one speaker, you can use only one sound source like a solo instrument, and the sound of an instrument can be reproduced more realistically. In addition to solo performances, it is necessary to assume that there is at least two speakers, and monaural (single) cannot provide a three-dimensional effect or a sense of realism. Therefore, it is impossible to clearly reproduce the size of the recording venue and the positional relationship of each instrument. As described above, the conventional stereo apparatus cannot hear a realistic sound.

  As for the stereo apparatus, a stereo apparatus that can obtain an appropriate surround feeling at the listening position or that can enjoy a natural stereo feeling has been proposed. In particular, various technologies have been proposed for audio devices including in-vehicle audio devices. For example, in an automobile indoor space where an in-vehicle audio device is used, it is difficult to create an ideal sound field such as music output by the in-vehicle audio device due to the influence of the shape of the indoor space, seats, etc. Audio that provides an ideal sound field at the listening position by generating correction data for correcting audio data in advance from the output data and measurement data, and correcting the audio data based on the correction data. There is a device (see, for example, Patent Document 1).

  In addition, there is a multi-channel audio system that aims to physically reproduce the sound field itself in which the original sound source exists in space. The multi-channel audio system uses wavefront synthesis technology, and it is assumed that a listener can enjoy a realistic sound by outputting sound from an array speaker including a plurality of speakers (for example, Patent Document 2). reference).

JP 2007-124327 A JP 2008-147839 A

  Stereo devices and audio devices that have been proposed so far can enjoy a sense of nature or realism. A delay circuit is provided to delay the sound signal, change the phase, or change the sound pressure level in each frequency band. However, it was possible to improve the natural or realistic sensation by electrically adjusting and changing the sound signal, etc., and to reproduce the multi-channel recording with a multi-channel playback system. Such a method is intended to improve the sense of stereo in the former by electrically modifying the sound signal to create an original sound, and in the latter, the effect of the speaker device of the present invention to be improved. Instead of trying to get a multi-channel effect. Therefore, it is difficult to say that both methods have sufficiently improved naturalness and realism. In addition, when a method of electrically adjusting and changing a sound signal is used, the configuration of the control circuit or the like tends to be complicated. Needless to say, it is desirable to improve the natural feeling and real feeling of the stereo apparatus with a simple and inexpensive apparatus.

  An object of the present invention is to provide a speaker device and a sound reproducing method capable of reducing the adverse effect of synthesized sound from the left and right main speakers in a stereo device and reproducing a sound field in a realistic manner.

  Humans first determine where the sound is coming from or what sound it is by the direct sound (attack sound) that reaches the ear. If this attack sound is not reproduced correctly and becomes dull, important information such as where the sound comes from or what it is is lost, making it impossible to judge the information accurately. . The inventor of the present invention lacks realism in the conventional stereo device because the attack sound and the subsequent indirect sound are not correctly reproduced. The attack sound and the subsequent indirect sound are The present inventors have found that a realistic sound field can be reproduced by improving correctly and have completed the present invention. By accurately reproducing the attack sound with the speaker device of the present invention, it is possible to accurately reproduce the indirect sound in the result with the existing stereo device. The present invention is as follows.

  The present invention according to claim 1 is a speaker device that is installed and used in the center of the left and right main speakers of a stereo device, and is a pair of middle and high-frequency speakers for left channel and right channel that are arranged adjacent to each other. And a medium / high sound signal processing means capable of cutting low frequency components from the input signals of the left channel and right channel, respectively, and outputting each medium / high frequency component.

  According to a second aspect of the present invention, in the speaker device according to the first aspect, the left channel and the right channel are arranged at the center of the pair of middle and high tone speakers so as to be adjacent to the middle and high tone speakers. A pair of high-frequency speakers, and high-frequency signal processing means capable of cutting the low and medium frequency components from the input signals of the left channel and the right channel and outputting each of the high frequency components.

  According to a third aspect of the present invention, in the speaker device according to the first or second aspect, a volume control capable of adjusting a sound pressure level of the signal output from the middle / high tone signal processing means and the high tone signal processing means. Means are provided.

  According to a fourth aspect of the present invention, in the speaker device according to any one of the first to third aspects, the middle / high tone speaker, the high tone speaker, the middle / high tone signal processing means, the treble signal processing means, and the The volume control means is housed in one housing.

  According to the fifth aspect of the present invention, a pair of middle and high tone speakers for the left channel and the right channel are arranged adjacent to each other at the center of the left and right main speakers of the stereo apparatus, The sound reproduction method is characterized in that the sound of each right channel is output, and the sound of the middle and high frequencies of each of the left channel and the right channel is output from the middle and high tone speaker.

  By installing the speaker device according to the present invention in the center of the left and right main speakers of the stereo device, the sound emitted from the speaker device located in the center is added to the sound emitted from the left and right main speakers. As a result, the entire transmission state becomes closer to one large respiratory wave (spherical wave). As a result, a correct tone can be reproduced and a sound with excellent naturalness and realism can be reproduced. In particular, the speaker device cuts the low frequency component and outputs only the middle and high frequency components, so that it is possible to reproduce a sound that is hardly affected by the room and that is excellent in naturalness and realism.

1 is an external view of a speaker device 1 as a first embodiment of the present invention. It is a model for demonstrating arrangement | positioning of the speaker of the speaker apparatus 1 as 1st embodiment of this invention. It is a block diagram which shows the structure of the speaker apparatus 1 as 1st embodiment of this invention. It is a figure for demonstrating the usage example of the speaker apparatus 1 as 1st embodiment of this invention. It is a figure for demonstrating the effect of the speaker apparatus 1 as 1st embodiment of this invention.

  FIG. 1 is an external view of a speaker device 1 as a first embodiment of the present invention, FIG. 2 is a schematic diagram for explaining the arrangement of speakers of the speaker device 1, and FIG. FIG.

  The speaker device 1 is a device that is installed in the center of the left and right main speakers of the stereo device, reduces the adverse effects of the synthesized sound from the left and right main speakers, and reproduces the sound field realistically. A supply speaker composed of a pair of high-frequency speakers 11 and a pair of medium-high-frequency speakers 13 and a network unit for outputting signals to the supply speakers are provided.

  The housing 3 fixes and stores the speakers, and stores therein a network that outputs signals to be sent to the high-frequency speakers 11 and the middle-high-frequency speakers 13, respectively. The housing 3 has a curved front surface 5 and is provided with openings 7 for attaching four speakers. Each speaker is attached to a position slightly recessed from the wall surface of the front surface portion 5, and a trumpet-shaped wall surface 9 is provided from the front surface of each speaker toward the opening portion 7. The width | variety of the housing | casing 3 is so narrow that it goes back. The shape of the housing 3 is not particularly limited to this shape, and the size is not limited to a specific size. However, it is important that the four speakers are arranged adjacent to each other.

  The pair of high-frequency speakers 11 are speakers for outputting high-frequency sounds, and are arranged vertically in the center of the housing 3. The high-frequency speakers 11 a arranged on the upper side are for the right channel and are arranged on the lower side. The speaker 11b is for the left channel, and the two high-pitched speakers 11 are arranged adjacent to each other. The high-pitched speaker 11a disposed above may be used for the left channel, and the high-pitched speaker 11b disposed below may be used for the right channel. The high-frequency loudspeaker 11a for the right channel faces 15 to 25 degrees in the plan view as indicated by α1 in FIG. 2, and the high-frequency speaker 11b for the left channel is 15 in the plan view as indicated by α2 in FIG. It faces -25 degrees to the left, and is arranged so that the two high-pitched speakers 11a and 11b intersect in plan view. The installation angle in plan view of these two high-frequency speakers 11 is not necessarily limited to this angle, but installation at such an angle is preferable because the sound spreads. In the side view, the two high-pitched speakers 11a and 11b are vertically installed.

  The pair of middle and high sound speakers 13 are speakers for outputting sounds in the middle and high sound range, and the speaker arranged on the left side of the central high sound speaker 11 in the front view is for the right channel and the right of the central high sound speaker 11. An adjacent speaker is for the left channel. As shown by α3 in FIG. 2A, the right-channel middle / high tone speaker 13a faces 35 to 45 degrees leftward in plan view, and the left-channel speaker 13b indicates by α4 in FIG. 2A. Thus, it faces 35 to 45 degrees rightward in plan view. Further, as shown by β1 in FIG. 2B, the two middle and high tone speakers 13 are installed upward at an angle of 60 to 70 degrees with respect to the horizontal plane in a side view. The installation angle of these two middle and high tone speakers 13 is not necessarily limited to this angle, but installation at such an angle is preferable because the sound spreads.

  The network unit is connected to a stereo device, cuts low and medium frequency components from the input signal, and is connected to the network device 15 (15a, 15b), which is a treble signal processing means for outputting a high frequency component, and connected to the stereo device. A network 17 (17a, 17b), which is a medium / high tone signal processing means for cutting out frequency components and outputting a medium / high frequency component, and an attenuator 19 (a volume control device which is connected to the networks 15, 17 and can adjust the sound pressure level) 19a, 19b), 21 (21a, 21b).

  The networks 15a and 15b are known networks, are connected to a stereo device, cut low and medium frequency components of the left channel and the right channel, and output high frequency components of the left channel and the right channel. The frequency to cut is a frequency of less than 10 KHz.

  The networks 17a and 17b are also known networks, are connected to a stereo device, cut low frequency components of the left channel and the right channel, and output middle and high frequency components of the left channel and the right channel. The frequency to cut can be less than 3.5 KHz. By setting the frequency to be cut below 3.5 KHz, it is possible to output with a commercially available general-purpose speaker, and the speaker device 1 can be manufactured at low cost. The frequency to be cut may be less than 5-6 KHz.

  The attenuators 19 and 21 are known attenuators, and can be connected to the networks 15 and 17 to adjust the sound pressure level of signals output from the networks 15 and 17. The attenuators 19a and 19b connected to the two networks 15a and 15b are simultaneously variable by one volume (not shown). Similarly, the attenuators 21a and 21b connected to the two networks 17a and 17b are simultaneously variable by another one volume not shown. The sound pressure level of the signal output to the high sound speaker 11 or the medium / high sound speaker 13 may be a sound pressure level of −6 to −16 dB as compared with the sound pressure levels of the left and right main speakers of the stereo apparatus. The speaker device 1 only needs to improve the attack sound, and does not necessarily require a large volume.

  Next, a usage example of the speaker device 1 will be described. FIG. 4 is a diagram for explaining a usage example of the speaker device 1. FIG. 5 is a diagram for explaining the function and effect of the speaker device 1. 4 (a) and 5 are plan views, and FIG. 4 (b) is a side view. 4 and 5, the speaker device 1 is illustrated in a simplified manner in order to explain the usage example and the operational effects of the speaker device 1, but the configuration of the speaker device 1 is the speaker illustrated in FIGS. 1 to 3. Device 1 is the same. 4 and 5, all are not necessarily drawn to the same scale.

  The speaker device 1 is installed and used at the following position. It is important that the speaker device 1 be installed at the center of the left and right main speakers 31a and 31b of the stereo device or the audio device in plan view. Further, the speaker device 1 has a distance between a listening position 33 between a line connecting the front center of the left and right main speakers 31a and 31b, a point L1 50 mm on the listening position side, and a line connecting the front center of the left and right main speakers 31a and 31b. It is preferable to install between 1/2 point L2. In FIG. 4 (a), this region is indicated by hatching. Regarding the installation of the speaker device 1 in the height direction, it is preferable to install it as follows. An angle β2 formed by a line connecting the height of the human ear positioned at the listening position 33 shown in FIG. 4B and the front center of the speaker device 1 with respect to the horizontal plane including the human ear is 0 to −40 degrees. A range is preferred. The speaker device 1 is installed at a position equal to or lower than the height of a person's ear located at the listening position 33. On the other hand, if the speaker device 1 is installed with the top and bottom and left and right connections reversed, the speaker device 1 can be installed at a position that is the same as or higher than the height of the human ear located at the listening position 33. FIG. The angle β2 formed by the line connecting the height of the human ear located at the listening position 33 shown in (b) and the front center of the speaker device 1 with respect to the horizontal plane including the human ear is preferably in the range of 0 to +40 degrees. . If the speaker device 1 is installed in this way and listens to the sound at the listening position 33 that is the center of the left and right main speakers 31a and 31b, it is possible to listen to sound that is excellent in naturalness and realism.

  FIG. 5A shows a waveform when the speaker device 1 is installed at the center of the left and right main speakers 31a and 31b of the stereo device and sound is output. When the speaker device 1 is installed and the sound is reproduced by the stereo device as described above, the sound emitted from the pair of left and right main speakers 31a and 31b of the stereo device shown by the broken line in FIG. 5 (a), the sound emitted from the speaker device 1 located in the center, indicated by the solid line, is added, and these sounds are synthesized, and the transmission state becomes closer to one large respiratory wave (spherical wave) as a whole. I understand that. On the other hand, FIG. 5B shows a sound transmission state when the sound is output from the stereo device without the speaker device 1 being installed, and the sound is the most at the center position of the left and right main speakers 31a and 31b. You can see that it arrived late.

  In the speaker device 1, the sound of the low frequency component is cut and the sound of the middle and high range is output. This is because the high tone is shifted and easily attached to the ear, and the low tone is time difference, distance difference, volume. Even if there is a difference, since one wavelength is long, the composition shift in the low sound is not a problem. If all the sounds of the low, medium and high frequency components are output in the same way as the main speakers 31a and 31b without cutting the sound of the low frequency components, the sound will be excessive.

  As described above, by using the speaker device 1 according to the present invention, the attack sound is improved and the sound field can be reproduced realistically. Generally, placing speakers of the same sound source side by side in addition to the left and right main speakers 31a, 31b of a stereo device is the same action as adding sound or artificially adding incidental sound, and good results are obtained. I can't imagine it, but this way of improving what was originally lagging can be very effective. When an experiment was actually performed using a prototype, good results were obtained. The original synthesized sound, the left / right distance difference, and the left / right time difference are remarkably improved, so that an effect such as listening to the state-of-the-art sound field of the respiratory wave is created instead of the synthesized sound. Therefore, the effect of reducing the adverse effect of the synthesized sound from the left and right main speakers 31a and 31b becomes significant. In addition, the speaker device 1 according to the present invention has a simple configuration as described with reference to the embodiment, and can be manufactured at low cost.

  In the above-described embodiment, an example in which a pair of high-pitched speakers 11 and a pair of medium- and high-pitched speakers 13 are housed in one housing 3 has been described. However, it is not always necessary to install the speakers in one housing 3. What is important is that the treble speaker 11 and the middle / high tone speaker 13 are installed adjacent to each other. In the above-described embodiment, an example in which the speaker device 1 includes the pair of high-pitched speakers 11 and the pair of medium- and high-pitched speakers 13 has been described. Even when only a pair of middle and high tone speakers 13 is used, it is important that the pair of speakers be adjacent to each other. When using a stereo device in a wide venue, it is preferable that the speaker device 1 includes not only the middle / high sound speaker 13 but also the high sound speaker 11, but the high sound speaker 11 is always necessary when used in a home. is not. Further, in the speaker device 1, when outputting a middle or high range sound or a high range sound, it is important to output the sound of the left and right channels from separate speakers, and the sound of the left and right channels is output as one sound. If you output with a speaker, you can not get a natural sense of reality.

DESCRIPTION OF SYMBOLS 1 Speaker apparatus 3 Housing | casing 5 Front part 7 Opening part 9 Wall surface 11 11a, 11b High sound speaker 13 13a, 13b Medium / high sound speaker 15 15a, 15b Network 17 17a, 17b Network 19 19a, 19b Attenuator 21 21a, 21b Attenuator 31a, 31b Main speaker 33 listening position

Claims (5)

A speaker device installed and used in the center of the left and right main speakers of a stereo device,
A pair of middle and high tone speakers for the left channel and the right channel arranged adjacent to each other;
Medium and high tone signal processing means capable of cutting each low frequency component from the input signal of each of the left channel and the right channel and outputting each medium and high frequency component;
A speaker device comprising: Furthermore, a pair of high-frequency speakers for the left channel and the right channel disposed so as to be adjacent to the medium-high frequency speaker at the center of the pair of medium-high frequency speakers,
High sound signal processing means capable of cutting low and medium frequency components from the input signals of each of the left channel and the right channel and outputting each high frequency component;
The speaker device according to claim 1, further comprising:   The speaker device according to claim 1, further comprising a volume adjusting unit capable of adjusting a sound pressure level of a signal output from the middle / high tone signal processing unit and the high tone signal processing unit.   4. The medium / high sound speaker, the high sound speaker, the medium / high sound signal processing means, the high sound signal processing means, and the volume control means are housed in a single casing. The speaker device according to item. In the center of the left and right main speakers of the stereo device, a pair of middle and high tone speakers for the left channel and the right channel are arranged adjacent to each other,
A sound reproduction method comprising outputting left and right channel sounds from left and right main speakers and outputting middle and high frequency sounds from the left and right channels from the middle and high tone speakers.

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