JP2019198128A - Acoustic reproduction system and acoustic reproduction method - Google Patents

Abstract

To provide an acoustic reproduction system and an acoustic reproduction method with which it is possible to reproduce music information with high reproducibility in a concert or a live show and improve realistic sensation.SOLUTION: An acoustic reproduction system 100 includes a sound source reproducing device 101 for reproducing a left-side original sound signal and a right-side original sound signal recorded in an original sound recording medium 101a, respectively. The left-side and right-side original sound signals reproduced by the sound source reproducing device 101 are respectively reproduced and outputted as a weak crosstalk audible reproduction sound and a weak crosstalk inaudible reproduction sound, with a portion of each of the left-side and right-side original sound signals added to each other to a small extent by a pre-amp 102. Furthermore, the left-side and right-side original sound signals reproduced by the sound source reproducing device 101 are respectively reproduced and outputted as a strong crosstalk audible reproduction sound and a strong crosstalk inaudible reproduction sound, with a portion of each of the left-side and right-side original sound signals added to each other by the pre-amp 120.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an acoustic reproduction system and an acoustic reproduction method that can reproduce music information such as singing and playing at a concert venue or a live venue with high accuracy.

  2. Description of the Related Art Conventionally, sound reproduction systems that reproduce music information such as concerts and live recorded on recording media such as CDs (Compact Discs) and DVDs (Digital Versatile Discs) with high presence have been proposed. For example, in Patent Document 1 below, a crosstalk sound obtained by adding a part of each of two original left and right music signals corresponding to human ears cannot be heard by the original sound and the human ear. An acoustic reproduction system is disclosed that outputs an audible sound (20 kHz or higher) to a listener.

JP-A-2015-198422

  However, in this type of sound reproduction system as described in each of the above-mentioned Patent Documents 1, high reproducibility of music information and improvement of realism are always required.

  The present invention has been made to address the above problems, and an object of the present invention is to provide a sound reproduction system and a sound reproduction method capable of improving the sense of reality by reproducing music information in concerts and live performances with high reproducibility. It is to provide.

  In order to achieve the above object, the present invention is characterized by a non-audible sound signal that represents a non-audible sound that cannot be heard by a person at a frequency equal to or higher than an audible sound that a person can hear by a person's ear, and a person listens by the ear A sound source playback device for outputting left and right original sound signals represented by two channels corresponding to human left and right ears including audible sound, and a left original sound signal and a right original sound signal, respectively. When a part of the signals is added to each other, the left side weak crosstalk sound signal and the right side weak crosstalk are added by adding the signal amount on the adding side to the signal amount on the adding side in an amount of 1/30 or less in voltage ratio. A weak crosstalk unit that generates and outputs sound signals respectively, and a signal amount on the side that can be added to the input signal amount when the left original sound signal and right original sound signal are input and a part of the signal is added to each other Vs. A strong crosstalk unit that generates and outputs a left strong crosstalk sound signal and a right strong crosstalk sound signal in addition to the voltage ratio exceeding 1/30, a left weak crosstalk sound signal, and a right weak crosstalk. Amplifier that amplifies talk sound signal, left strong crosstalk sound signal, right strong crosstalk sound signal and non-audible sound signal respectively, left weak crosstalk sound signal amplified by amplifier, right weak crosstalk sound signal, left strong signal And a speaker for independently outputting a crosstalk sound signal, a right strong crosstalk sound signal, and a non-audible sound signal as sound waves.

  In this case, the sound source reproducing device records an audible sound in the original sound at a concert or live in two channels and records an inaudible sound in at least one channel (for example, CD, SACD, DVD, semiconductor memory, etc.). ) And a sound collecting device such as a microphone that records the audible sound of the original sound at a concert venue or live venue in two channels and collects the non-audible sound in at least one channel. be able to.

  According to the feature of the present invention configured as described above, the sound reproduction system is configured such that each weak crosstalk audible reproduction sound obtained by causing the listener to crosstalk a small amount of audible sound between the two channels of the original sound, and between the two channels of the original sound. The three types of sound waves, each of which is a strong crosstalk audible reproduction sound and a non-audible non-audible reproduction sound, in which the audible sound is crosstalked more than the weak crosstalk reproduction sound, are output via the speaker. As a result, according to experiments conducted by the present inventors, it is possible to reproduce the music information at concerts and live performances with high reproducibility for the listener, compared with the conventional sound reproduction system, thereby improving the sense of reality. confirmed. For this reason, the exact cause is unknown, but the type of sound waves (in other words, frequency components) of the weak crosstalk audible playback sound, strong crosstalk audible playback sound and non-audible playback sound that the listener feels is actually This is considered to be due to the fact that the listener directly and indirectly approximates the type of sound waves received from the sound source to the ears and body in concert venues and live venues. In particular, it was confirmed that small sounds such as triangle tones in orchestra performances can be heard clearly without being overwhelmed by the sound of other instruments.

  In addition, according to another aspect of the present invention, in the sound reproduction system, the left original sound signal and the right original sound signal are input, and the audible sound is extracted as a high sound and a medium low sound, or a high sound, a medium sound and a low sound, respectively. A pass filter is provided, and the speaker has a high sound and a medium low sound, or a left sound signal and a right sound signal for each of the high sound, the medium sound, and the low sound. The speaker is located closer to the listener than the speaker on the side.

  In these cases, the relationship between the treble and middle / low frequencies, or the relationship between the treble, middle and bass frequencies depends on the specifications and performance of the active filter, network, or speaker within the range of audible sound (20 Hz to 20 kHz). Are set relative to each other, and are not limited to a specific frequency or frequency band. In addition to directly inputting the left and right original sound signals, the bandpass filter processes the left and right original sound signals such as the left and right weak crosstalk sound signals and the left and right strong crosstalk sound signals. Is included.

  According to another aspect of the present invention configured as described above, the sound reproduction system is represented by left and right weak crosstalk reproduction sounds represented by left and right weak crosstalk sound signals and left and right strong crosstalk sound signals. Because it has a speaker that outputs at least one of the left and right strong crosstalk playback sounds divided into high and middle tones, or high, medium and low tones, it can be used for music information in concerts and live performances. Reproduction with high reproducibility can improve the sense of reality. In addition, according to the present invention, a relatively low-frequency speaker is disposed between these speakers at a position closer to the listener than a high-frequency speaker. Compared with the case where the loudspeaker and the loudspeaker are arranged at the same distance from the listener, a more realistic sound can be reproduced.

  Another feature of the present invention is that in the sound reproduction system, a speaker is provided for each of the left weak crosstalk sound signal, the right weak crosstalk sound signal, the left strong crosstalk sound signal, and the right strong crosstalk sound signal. The speaker that outputs the left strong crosstalk sound signal and the right strong crosstalk sound signal is arranged closer to the listener than the speaker that outputs the left weak crosstalk sound signal and the right weak crosstalk sound signal, respectively. There is.

  According to another aspect of the present invention configured as described above, the sound reproduction system includes a speaker that outputs a left strong crosstalk sound signal and a right strong crosstalk sound signal as a left weak crosstalk sound signal and a right weak crosstalk signal. According to the sensory experiment of the present inventors, the speaker that outputs the left and right weak crosstalk sound signals and the left and right strong crosstalk sound signals are arranged by placing them closer to the listener than the speakers that output the sound signals. Compared with the case where the output speaker is arranged at the same height position with respect to the same listener, a more realistic sound can be reproduced.

  Another feature of the present invention is that in the sound reproduction system, the speaker supports the speaker body in a state where the speaker body that converts an electrical signal into sound waves and the side opposite to the sound wave generating side of the speaker body are covered. The enclosure has a parallel portion in which the inner side surfaces of the left and right side surfaces extend parallel to each other from the speaker body side toward the rear, and from the rear end portion of the parallel portion toward the rear. It consists of an inclined portion that is inclined inward so as to approach.

  According to another aspect of the present invention configured as described above, the sound reproduction system is configured such that the inner side surfaces of the left and right side surfaces of the box-shaped enclosure that supports the speaker body that converts electrical signals into sound waves are rearward from the speaker side. According to the sensory experiment of the present inventors by comprising a parallel portion extending parallel to each other and an inclined portion inclined inward so as to approach each other from the rear end portion of the parallel portion toward the rear. For example, a reverberant sound can be generated compared to the case where both side surfaces of the enclosure are simply constituted by parallel portions or inclined portions.

  Another feature of the present invention is that, in the sound reproduction system, the speaker is configured such that the inclined portion of the enclosure is an arcuate curved surface.

  According to another feature of the present invention configured as described above, according to the sensory experiment of the present inventors, in the sound reproduction system, the speaker is configured with an arcuate curved surface in the enclosure. As compared with the case where the inclined portion of the enclosure is configured by a plane extending linearly, a richer reverberant sound can be generated.

  Further, the present invention can be implemented not only as an invention of a sound reproduction system but also as an invention of a sound reproduction method.

  Specifically, the sound reproduction method is a non-audible sound signal representing a non-audible sound that cannot be heard by the human ear at a frequency equal to or higher than an audible sound that can be heard by the human ear, and the human can listen by the ear. A sound source playback step for outputting left and right original sound signals represented by two channels corresponding to human left and right ears including audible sound, and inputting the left and right original sound signals, When adding a part of the signal, the signal amount on the adding side is added to the signal amount on the adding side at a voltage ratio of 1/30 or less, and the left weak crosstalk sound signal and the right weak crosstalk sound signal are added. A weak crosstalk step to be generated and output, and when the left and right original sound signals are input and a part of the signal is added to each other, the signal amount on the adding side is compared with the signal amount on the adding side. A strong crosstalk step that generates and outputs a left strong crosstalk sound signal and a right strong crosstalk sound signal in addition to the voltage ratio exceeding 1/30, a left weak crosstalk sound signal, and a right weak crosstalk. Amplifying step for amplifying sound signal, left strong crosstalk sound signal, right strong crosstalk sound signal and non-audible sound signal, left weak crosstalk sound signal amplified by amplification step, right weak crosstalk sound signal, left And a sound wave output step of outputting the strong crosstalk sound signal, the right strong crosstalk sound signal, and the non-audible sound signal as sound waves from independent speakers, respectively. According to this, the same effect as the said sound reproduction system can be expected.

  In this case, the sound source playback step uses a playback device that plays back an original sound recording medium (for example, CD, SACD, DVD, semiconductor memory, etc.) on which music information consisting of the original sound such as a concert or live is recorded in two channels. It can be realized by using a sound collecting device such as a microphone that collects music information at a concert venue or a live venue using two channels.

It is a mimetic diagram showing roughly the system configuration of the sound reproduction system concerning a 1st embodiment of the present invention. It is a perspective view which shows typically the outline of the external appearance structure of the enclosure type speaker used for the sound reproduction system shown in FIG. It is sectional drawing which shows typically the outline of the internal structure of the speaker shown in FIG. It is a schematic diagram which shows schematically the system configuration | structure of the sound reproduction system which concerns on 2nd Embodiment of this invention. It is a side view which shows typically the arrangement configuration of the enclosure type speaker used for the sound reproduction system shown in FIG. It is a top view which shows typically the arrangement configuration of the enclosure type speaker used for the sound reproduction system shown in FIG.

<First Embodiment>
Hereinafter, an embodiment of a sound reproduction system according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing an outline of the system configuration of the sound reproduction system 100 according to the first embodiment of the present invention. The sound reproduction system 100 is a group of apparatuses that mainly reproduce indoors the original sound recording medium 101a on which music information (in other words, sound wave information) composed of audio or performance at a concert or live performance is recorded.

(Configuration of the sound reproduction system 100)
The sound reproduction system 100 includes a sound source reproduction device 101. The sound source reproduction device 101 is a device that reads out and outputs sound wave information as an electrical signal from an original sound recording medium 101a in which sound wave information of a concert or live is recorded. In this case, the original sound recording medium 101a is used for concert and live music information, specifically, an audible sound (20 Hz to 20 kHz) that can be heard by human ears and a non-audible sound (20 kHz that cannot be heard by human ears). The above is recorded in two channels corresponding to the left and right ears of a person. The original sound recording medium 101a can be composed of, for example, an SACD (Super Audio Compact Disc), a magnetic tape, or a semiconductor memory. In the present embodiment, the original sound recording medium 101a is composed of SACD.

  That is, in the present embodiment, the sound source playback device 101 is configured by a so-called SACD player that converts digital sound wave data recorded on the SACD into an analog electrical signal that can be played back by a speaker and outputs the analog electrical signal. The sound source reproduction device 101 outputs a left-side original sound signal and a right-side original sound signal, each of which represents two-channel music information recorded on an original sound recording medium 101a made of SACD, as an electrical signal. In this case, the left original sound signal and the right original sound signal include a signal representing an inaudible sound in addition to a signal representing an audible sound, that is, a left inaudible sound signal and a right inaudible sound signal, respectively. A preamplifier 102 and a preamplifier 120 are connected to the sound source reproduction device 101.

  The preamplifier 102 inputs the left original sound signal and the right original sound signal output from the sound source reproduction device 101, respectively, amplifies the voltage, and a part of the mutual signal between the left original sound signal and the right original sound signal. The amplifying device outputs the added left weak crosstalk sound signal and right weak crosstalk sound signal. More specifically, the preamplifier 102 includes two amplification circuits (not shown) that amplify each voltage for each of the left original sound signal and the right original sound signal, and the left original sound signal and the right original sound amplified by these amplification circuits, respectively. Two crosstalk portions L102a and R102b that respectively generate a left weak crosstalk sound signal and a right weak crosstalk sound signal using the signal are provided.

  The crosstalk section L102a is an electric circuit for generating a left weak crosstalk signal by adding a part of the right original sound signal to the left original sound signal, and includes an attenuator and an adder (not shown). The crosstalk section R102b is an electric circuit for generating a right weak crosstalk signal by adding a part of the left original sound signal to the right original sound signal, and includes an attenuator and an adder (not shown). Yes. In this case, each part in the left original sound signal and the right original sound signal is not a part of the frequency component included in each signal (that is, not qualitative), but is a part of the whole signal (that is, , Quantitative things). Therefore, the left crosstalk signal and the right crosstalk signal include a signal representing an inaudible sound in addition to a signal representing an audible sound, that is, a left weak crosstalk non-audible sound signal and a right weak crosstalk non-audible sound signal. Configured.

  Each of the two attenuators constituting each of the crosstalk portion L102a and the crosstalk portion R102b has a predetermined attenuation rate for each of the left original sound signal and the right original sound signal extracted from the left original sound signal and the right original sound signal, respectively. It is an electrical circuit that decays. In the present embodiment, each attenuator attenuates each part of the left original sound signal and the right original sound signal to 1/30 of the voltage ratio. Further, the two adders constituting the crosstalk portion L102a and the crosstalk portion R102b respectively convert the left original sound signal and the right original sound signal respectively attenuated by the two attenuators into the right original sound signal and the left original sound. It is an electric circuit that generates a left weak crosstalk sound signal and a right weak crosstalk sound signal by adding to each signal.

  That is, most of the left weak crosstalk sound signal is composed of the left original sound signal, and the right weak crosstalk sound signal is composed of the right original sound signal. Therefore, in the preamplifier 102, the crosstalk portion L102a and the crosstalk portion R102b are omitted, and the electric circuit for amplifying the left original sound signal and the electric circuit for amplifying the right original sound signal interfere with each other electrically and magnetically. The left weak crosstalk sound signal and the right weak crosstalk sound signal can be generated. For example, the preamplifier 102 is configured by reducing the shielding ability of the shield that prevents the electric circuit for amplifying the left original sound signal and the electric circuit for amplifying the right original sound signal from electrically and magnetically interfering with each other. be able to. An active filter amplifier 103 and a power amplifier 110 are connected to the preamplifier 102, respectively.

  The active filter amplifier 103 is a filter circuit that extracts and outputs the left weak crosstalk sound signal and the right weak crosstalk sound signal output from the preamplifier 102 for each of a plurality of frequency bands, and the bandpass filter according to the present invention. It corresponds to. The active filter amplifier 103 mainly includes a resistance element, a capacitor element, and an amplification element. In the present embodiment, the active filter amplifier 103 uses the left weak crosstalk sound signal and the right weak crosstalk sound signal as frequencies of high sound (8400 Hz to 35 kHz), medium sound (420 Hz to 8400 Hz), and low sound (less than 420 Hz), respectively. Output for each band. The active filter amplifier 103 is connected with power amplifiers 104a to 104c for each frequency band.

  The power amplifiers 104a to 104c are amplification devices that amplify and output the power of the left weak crosstalk sound signal and the right weak crosstalk sound signal respectively output from the active filter amplifier 103 for each frequency band. Speakers 105L, 105R, 106L, 106R, 107L, and 107R corresponding to each frequency band are connected to these power amplifiers 104a to 104c, respectively.

  The speakers 105L, 105R, 106L, 106R, 107L, and 107R respectively input the left weak crosstalk sound signal and the right weak crosstalk sound signal for each frequency band output from the power amplifiers 104a to 104c, respectively. It is a device that converts and outputs sound waves corresponding to the weak crosstalk sound signal and the right weak crosstalk sound signal, respectively. Each of these speakers 105L, 105R, 106L, 106R, 107L, and 107R includes left speakers 105L, 106L, and 107L corresponding to two channels, and right speakers 105R, 106R, and 107R on the left and right sides in front of the listener U, respectively. They are arranged opposite to each other.

  Here, the speakers 105 </ b> L and 105 </ b> R are so-called so as to input a high-frequency left-side weak crosstalk sound signal and a right-side weak crosstalk sound signal output from the power amplifier 104 a and convert them into sound waves of a high-frequency band (8400 Hz to 35 kHz). Tweeter. Also, the speakers 106L and 106R respectively input the left weak crosstalk sound signal and the right weak crosstalk sound signal in the middle sound band (420 Hz to 8400 Hz) output from the power amplifier 104b, and convert them into sound waves in the middle sound band. It is a so-called squawker. The speakers 107 </ b> L and 107 </ b> R are so-called woofers that respectively input the low-frequency left-side weak crosstalk sound signal and the right-side weak crosstalk sound signal output from the power amplifier 104 c and convert them into sound waves in the low-frequency band (less than 420 Hz).

  Further, the speaker 106L and the speaker 107L, and the speaker 106R and the speaker 107R are each integrally formed in an enclosure type. Specifically, the speakers 106L and 107L and the speakers 106R and 107R are configured by speaker bodies 108a and 108b, which are cone-type speakers, and an enclosure 109, as shown in FIGS.

  The enclosure 109 is a part that accommodates and holds the speaker main body 108a, 108b with the cone side exposed to the outside and covers the opposite side (voice coil side) of the cone side. Formed and configured. In this case, the enclosure 109 holds the speaker main body 108a corresponding to the speakers 106L and 106R and the speaker main body 108b corresponding to the speakers 107L and 106R in a state where they are arranged in the vertical direction. The enclosure 109 has left and right side surfaces that extend in the vertical direction, and includes a parallel portion 109a and an inclined portion 109b.

  The parallel portion 109a is a portion in which the inner side surfaces of the left and right side surfaces of the enclosure 109 extend in parallel from the speaker main bodies 108a and 108b toward the rear. In this case, each parallel portion 109a is formed such that the rear end portion extends to substantially the same position as the rear end portions of the speaker main bodies 108a and 108b. The inclined portion 109b is a portion that extends while inclining inward so as to approach each other from the rear end portion of each parallel portion 109a toward the rear. In this case, each inclined portion 109b may be configured by a plane extending linearly, but may be configured by a curved surface extending in an arc shape.

  The enclosure 109 is provided with a reinforcing plate 109c between the speaker body 108a and the speaker body 108b. The reinforcing plate 109c is a plate-like component for maintaining the box shape of the enclosure 109, and is provided at the center portion of the enclosure 109 in the vertical direction. In this case, the reinforcing plate 109c has a through hole so that the upper space and the lower space inside the enclosure 109 communicate with each other. Note that the reinforcing plate 109c can be configured by omitting the through hole to partition the upper space and the lower space in the enclosure 109.

  The power amplifier 110 is an amplifying device that amplifies and outputs each power of the left weak crosstalk sound signal and the right weak crosstalk sound signal respectively output from the preamplifier 102. A high pass filter 111 is connected to the power amplifier 110. The high-pass filter 111 is a signal in the non-audible sound band (35 kHz or more) of the left weak crosstalk sound signal and the right weak crosstalk sound signal output from the power amplifier 110, that is, the left weak crosstalk non-audible sound signal. And a filter circuit that extracts and outputs right weak crosstalk non-audible sound signals, and mainly includes a resistance element, a capacitor element, and an amplification element. Speakers 112L and 112R are connected to the high pass filter 111, respectively.

  The speakers 112L and 112R respectively input the left weak crosstalk non-audible sound signal and the right weak crosstalk non-audible sound signal output from the high-pass filter 111, respectively, and input the left weak crosstalk non-audible sound signal and the right weak cross-talk. It is a device that converts and outputs sound waves corresponding to talk non-audible sound signals. That is, the speakers 112L and 112R are so-called super tweeters that output sound waves in a non-audible sound band (35 kHz or more). In these speakers 112L and 112R, the left speaker 112L and the right speaker 112R corresponding to the two channels are respectively arranged to face the left and right sides in front of the listener U, respectively.

  The preamplifier 120 inputs the left original sound signal and the right original sound signal output from the sound source reproduction device 101, respectively, amplifies the voltage, and between the left original sound signal and the right original sound signal, a part of the mutual signal is mutually obtained. The amplifying apparatus outputs the left strong crosstalk sound signal and the right strong crosstalk sound signal, respectively. More specifically, the preamplifier 120 includes two amplification circuits (not shown) that amplify each voltage for each of the left original sound signal and the right original sound signal, and the left original sound signal and the right original sound amplified by these amplification circuits, respectively. Two crosstalk portions L121 and R122 that respectively generate a left strong crosstalk sound signal and a right strong crosstalk sound signal using the signal are provided. In this case, the crosstalk unit L121 and the crosstalk unit R122 include crosstalk adjusters 121a and 122a for adjusting the amount of crosstalk, respectively.

  The crosstalk section L121 is an electric circuit for generating a left strong crosstalk signal by adding a part of the right original sound signal to the left original sound signal, and includes an attenuator and an adder (not shown). The crosstalk unit R122 is an electric circuit for generating a right strong crosstalk signal by adding a part of the left original sound signal to the right original sound signal, and includes an attenuator and an adder (not shown). Yes.

  In this case, each part in the left original sound signal and the right original sound signal is not a part of the frequency component included in each signal (that is, not qualitative), but is a part of the whole signal (that is, , Quantitative things). Therefore, the left strong crosstalk signal and the right strong crosstalk signal include signals representing non-audible sounds in addition to signals representing audible sounds, that is, left strong crosstalk non-audible sound signals and right strong crosstalk non-audible sound signals. Consists of included.

  The two attenuators constituting each of the crosstalk section L121 and the crosstalk section R122 respectively adjust the respective crosstalks for the left original sound signal and the right original sound signal respectively extracted from the left original sound signal and the right original sound signal. It is an electric circuit that attenuates at an attenuation rate indicated by each of the devices 121a and 122a. The two adders constituting the crosstalk portion L121 and the crosstalk portion R122 respectively convert the left original sound signal and the right original sound signal respectively attenuated by the two attenuators into the right original sound signal and the left original sound. It is an electric circuit that generates a left crosstalk sound signal and a right crosstalk sound signal by adding to each signal.

  Further, the crosstalk adjusters 121a and 122a provided in the crosstalk unit L121 and the crosstalk unit R122, respectively, manually set the attenuation factors in the crosstalk unit L121 and the crosstalk unit R122 in the range of 0% to 100%. This is an operator that can be adjusted to set the amount of crosstalk. In this case, the crosstalk adjusters 121a and 122a are set to an attenuation rate larger than 1/30 of the attenuation rate (output voltage / input voltage) of the crosstalk unit L102a and the crosstalk unit R102b. The preamplifier 120 includes a volume (not shown) for manually adjusting the output magnitude of the left original sound signal and the right original sound signal. The preamplifier 120 is connected to a power amplifier 123.

  The power amplifier 123 is an amplification device that amplifies and outputs the power of the left strong crosstalk sound signal and the right strong crosstalk sound signal output from the preamplifier 120. Speakers 124L, 124R, 125L, 125R, 126L, 126R, 127L, and 127R are connected to the power amplifier 123, respectively.

  The speakers 124L, 124R, 125L, 125R, 126L, 126R, 127L, and 127R receive the left strong crosstalk sound signal and the right strong crosstalk sound signal output from the power amplifier 123, respectively, and input these left strong crosstalk sounds. This is a device for converting and outputting sound waves respectively corresponding to the signal and the right strong crosstalk sound signal. Each of these speakers 124L, 124R, 125L, 125R, 126L, 126R, 127L, and 127R is provided with a network 128 composed of an electric circuit in which capacitors, coils, and resistors are combined, and left crosstalk in a specific frequency band. Only the sound signal and the right crosstalk sound signal are extracted and output.

  Specifically, the speakers 124 </ b> L and 124 </ b> R are so-called tweeters that the network 128 extracts and outputs a high-frequency band (13 kHz to 35 kHz) signal in the left strong crosstalk sound signal and the right strong crosstalk sound signal. The speakers 125L and 125R are so-called squawkers that the network 128 extracts and outputs signals in the mid-tone band (2 kHz to 13 kHz) of the left strong crosstalk sound signal and the right strong crosstalk sound signal. The speakers 126L and 126R are so-called woofers that the network 128 extracts and outputs signals in the low frequency band (less than 2 kHz) in the left strong crosstalk sound signal and the right strong crosstalk sound signal. The speakers 127L and 127R are so-called supertweeters that the network 128 extracts and outputs signals in the non-audible sound band (35 kHz or higher) in the left strong crosstalk sound signal and the right strong crosstalk sound signal.

  Each of these speakers 124L, 124R, 125L, 125R, 126L, 126R, 127L, 127R corresponds to the left speaker 124L, 125L, 126L, 127L and the right 124R, 125R, 126R, 127R corresponding to two channels, respectively. Are opposed to the left side and the right side in front of each other. In the present embodiment, the speakers 124L, 124R, 125L, 125R, 126L, 126R, 127L, and 127R are respectively arranged on the outer sides of the listener U with respect to the speakers 105L, 105R, 106L, 106R, 107L, and 107R. ing.

  Similarly to the speakers 106L and 107L and the speakers 106R and 107R, the speaker 125L and the speaker 126L and the speaker 125R and the speaker 126R are integrally formed in an enclosure type. That is, the speakers 125L and 126L and the speakers 125R and 126R are configured by a speaker body (not shown) and an enclosure (not shown) similar to the speaker bodies 108a and 108b and the enclosure 109.

(Operation of the sound reproduction system 100)
Next, the operation of the sound reproduction system 100 configured as described above will be described. Here, the sound reproduction system 100 is installed indoors or outdoors. In the present embodiment, the sound reproduction system 100 is installed indoors. A listener U who listens to music (singing or playing) using the sound reproduction system 100 first turns on the power of the sound reproduction system 100 and then operates the crosstalk adjusters 121a and 122a to operate the crosstalk unit L121. And the attenuation rate of each attenuation circuit in the crosstalk unit 122, that is, the crosstalk amount in the crosstalk unit L121 and the crosstalk unit 122 are set. In this case, the amount of crosstalk is an amount exceeding at least 1/30, preferably 10% or more and 80% or less, more preferably 30% in terms of voltage ratio with respect to the original left-side original sound signal and right-side original sound signal. % Or more and 60% or less, more preferably 40% or more and 50% or less. In the present embodiment, the listener U sets the crosstalk rate representing the ratio of the left and right crosstalk amounts to 50%.

  Next, the listener U sets and reproduces the original sound recording medium 101a in the sound source reproducing device 101, and also reproduces the speakers 105L, 105R, 106L, 106R, 107L, 107R, 112L, 112R, 124L, 124R, 125L, 125R, It is positioned in front of 126L, 126R, 127L, 127R and waits for music playback. As a result, the sound source playback device 101 reads out the signals related to the audible sound and the inaudible sound for each of the two channels recorded in the original sound recording medium 101a, and outputs the left original sound signal and the right original sound signal, respectively (sound source reproduction according to the present invention). Step).

  The left original sound signal and the right original sound signal output from the sound source reproduction device 101 are output to the preamplifier 102 and the preamplifier 120, respectively. The preamplifier 102 performs voltage amplification on each of the left original sound signal and the right original sound signal output from the sound source reproduction device 101 (amplification step according to the present invention), and then a part of the right original sound signal by the crosstalk unit L102a and the crosstalk unit R102b. Is added to the left original sound signal to generate a left weak crosstalk sound signal, and a part of the left original sound signal is added to the right original sound signal to generate a right weak crosstalk sound signal, and each weak crosstalk sound signal is active-filtered. Output to the amplifier 103 and the power amplifier 110, respectively. In this case, the amount by which a part of the right original sound signal is added to the left original sound signal, and the amount of a part of the left original sound signal to be added to the right original sound signal is a voltage ratio with respect to the signal amount to which the signal amount to be added is added. Add up to 1/30 of the amount.

  The active filter amplifier 103 divides the left weak crosstalk sound signal and the right weak crosstalk sound signal for each frequency band and outputs the divided signals to the power amplifiers 104a to 104c. The power amplifiers 104a to 104c amplify the power of the input left weak crosstalk sound signal and right weak crosstalk sound signal and output them to the speakers 105L, 105R, 106L, 106R, 107L, and 107R, respectively (amplification step according to the present invention). ). As a result, the speakers 105L, 105R, 106L, 106R, 107L, and 107R slightly crosstalk each audible sound component extracted from the left original sound signal and the right original sound signal recorded on the original sound recording medium 101a. The weak crosstalk audible reproduction sound is output to the listener U for each of the high, medium and low frequency bands (sound wave output step according to the present invention).

  Further, the power amplifier 110 amplifies the power of the left weak crosstalk sound signal and the right weak crosstalk sound signal, respectively, and outputs them to the high pass filter 111 (amplification step according to the present invention). The high-pass filter 111 extracts only the left weak crosstalk non-audible sound signal and the right weak crosstalk non-audible sound signal, which are non-audible sound band signals, from the left weak crosstalk sound signal and the right weak crosstalk sound signal, respectively. Output to the speakers 112L and 112R, respectively. As a result, the speakers 112L and 112R reproduce each weak crosstalk inaudible reproduction in which the respective non-audible sound components extracted from the left-side original sound signal and the right-side original sound signal recorded on the original sound recording medium 101a are slightly crosstalked with each other. Each sound is output toward the listener U (sound wave output step according to the present invention).

  On the other hand, the preamplifier 120 performs voltage amplification on the left original sound signal and the right original sound signal output from the sound source reproduction device 101 (amplification step according to the present invention), and then the right original sound signal is generated by the crosstalk unit L121 and the crosstalk unit R122. A part of the left original sound signal is generated by adding a part to the left original sound signal, and a part of the left original sound signal is added to the right original sound signal to generate a right strong crosstalk sound signal. Output to the power amplifier 123 (crosstalk step according to the present invention). In this case, the amount of adding a part of the right original sound signal to the left original sound signal and the amount of adding a part of the left original sound signal to the right original sound signal correspond to the set crosstalk amount.

  The power amplifier 123 amplifies the input left strong crosstalk sound signal and right strong crosstalk sound signal and outputs the amplified signals to the speakers 124L, 124R, 125L, 125R, 126L, 126R, 127L, 127R, respectively (according to the present invention). Amplification step). As a result, the speakers 124L, 124R, 125L, 125R, 126L, 126R, 127L, 127R mutually weaken each audible sound component extracted from the left original sound signal and the right original sound signal recorded on the original sound recording medium 101a. A strong crosstalk audible reproduction sound that is crosstalked more than the amount of crosstalk in the audible reproduction sound of the crosstalk is output to the listener U for each of the high frequency, middle frequency, and low frequency bands (sound wave output according to the present invention). Step).

  Also, the speakers 127L and 127R mutually convert each non-audible sound component extracted from the left-side original sound signal and the right-side original sound signal recorded on the original sound recording medium 101a to a crosstalk amount in the weak crosstalk non-audible reproduced sound. A strong crosstalk non-audible reproduction sound that has been subjected to many crosstalks is output to the listener U (a sound wave output step according to the present invention).

  As a result, the listener U performs the crosstalk along with the two-channel weak crosstalk audible reproduction sound close to the substantially original sound slightly including the crosstalk and the weak crosstalk non-audible reproduction sound close to the substantially original sound slightly including the crosstalk. A two-channel strong crosstalk audible reproduction sound that clearly includes two channels and a two-channel strong crosstalk non-audible reproduction sound that clearly includes crosstalk are received. In this case, the listener U clearly includes crosstalk for weak crosstalk audible reproduction sound and weak crosstalk non-audible reproduction sound close to the original sound by adjusting volumes (not shown) provided in the preamplifier 102 and the preamplifier 120, respectively. The ratio of strong crosstalk audible playback sound and strong crosstalk non-audible playback sound can be adjusted. According to the experiments by the present inventors, the weak crosstalk audible reproduction sound and the weak crosstalk non-audible reproduction sound close to the original sound and the strong crosstalk audible reproduction sound and the strong crosstalk non-audible reproduction sound clearly including the crosstalk are obtained. A ratio of 3 to 7 to 7 to 3 is suitable.

  In addition, according to the experiments by the present inventors using the sound reproduction system 100 configured as described above, 100 people including men and women in their 10s to 80s almost equally listened to the sound reproduced by the sound reproduction system 100. In some cases, an experiment result that 85% of people felt a high sense of realism in the sound reproduced by the sound reproduction system 100 was obtained when the reproduced sound crosstalked between the original sounds of the two channels was simply heard.

  As can be understood from the above description of the operation, according to the first embodiment, the sound reproduction system 100 is a two-channel weak crosstalk audible reproduction sound close to the original sound with respect to the listener U, a weak cross close to the original sound. Four types of sound waves are output via the speaker: non-talk playback sound, two-channel strong crosstalk audible playback sound clearly including crosstalk, and two-channel strong crosstalk non-audible playback sound clearly including crosstalk. is doing. As a result, according to the experiments of the present inventors, it is possible to reproduce the music information at concerts and live performances with high reproducibility for the listener, compared with the conventional sound reproduction system, and to improve the sense of reality. confirmed. For this reason, the exact cause is unknown, but the type of sound waves that the listener feels weak crosstalk audible playback sound, strong crosstalk audible playback sound, weak crosstalk non-audible playback sound, and strong crosstalk non-audible playback sound This is because (in other words, the frequency component) approximates the type of sound waves that the listener receives directly and indirectly from the sound source to the ears and body in an actual concert venue or live venue. In particular, it was confirmed that small sounds such as triangle tones in orchestra performances can be heard clearly without being overwhelmed by the sound of other instruments.

Second Embodiment
Next, a second embodiment of the sound reproduction system according to the present invention will be described with reference to FIGS. The sound reproduction system 200 according to the second embodiment mainly differs from the first embodiment in the configuration of speakers. Therefore, in the description of the sound reproduction system 200 in the second embodiment, the description will focus on the parts that are different from the sound reproduction system 100 in the first embodiment, and the parts that are common to and corresponding to both the embodiments are described. The same reference numerals as those in the first embodiment are given, and description thereof is omitted as appropriate.

(Configuration of sound reproduction system 200)
The sound source reproduction device 101 is a device that reads out and outputs sound wave information from the original sound recording medium 101a as an electric signal. In this case, the original sound recording medium 101a may be one in which audible sound and non-audible sound are recorded in two channels corresponding to the left and right ears of a person, respectively, as in the first embodiment, but in the second embodiment, The non-audible sound uses the same non-audible sound recorded between the left and right channels in two channels. For this reason, the left weak crosstalk non-audible sound signal and the right weak crosstalk non-audible sound signal respectively output from the crosstalk portion L102a and the crosstalk portion R102b are the same signal.

  The active filter amplifier 103 outputs the left weak crosstalk sound signal and the right weak crosstalk sound signal for each of the high frequency band (3 kHz to 35 kHz) and the middle low frequency (3 kHz or less). The active filter amplifier 103 is connected with power amplifiers 104a and 104b for amplifying the left weak crosstalk sound signal and the right weak crosstalk sound signal for each of the high sound range and the middle and low sound range.

  Further, the power amplifiers 104a and 104b are respectively provided with speakers 201L, 201R, 202L, and 202R that convert the left weak crosstalk sound signal and the right weak crosstalk sound signal for each of the high sound range and the middle and low sound range into sound waves and output the sound waves, respectively. Is connected. In this case, the speaker 201L and the speaker 202L, and the speaker 201R and the speaker 202R are formed in an integral enclosure type in which a cone speaker is held in a box-shaped housing. Note that the speakers 201L, 201R, 202L, and 202R are formed in an enclosure type integrally including a parallel portion 109a and an inclined portion 109b as in the speaker 106L and the speaker 107L, and the speaker 106R and the speaker 107R in the first embodiment. Of course, you may.

  On the other hand, speakers 211L, 211R, 212L, 212R, 213L, and 213R are connected to the preamplifier 120 via a power amplifier 123, respectively. The speakers 211 </ b> L and 211 </ b> R are so-called tweeters that the network 128 extracts and outputs a high-frequency band (3 kHz to 35 kHz) signal in the left strong crosstalk sound signal and the right strong crosstalk sound signal. The speakers 212L and 212R are so-called woofers that the network 128 extracts and outputs signals in the middle and low frequency bands (3 kHz or less) in the left strong crosstalk sound signal and the right strong crosstalk sound signal.

  The speakers 213L and 213R are so-called subwoofers that the network 128 extracts and outputs a signal of a heavy bass band (less than 100 Hz) in the left strong crosstalk sound signal and the right strong crosstalk sound signal. That is, the sound reproduction system 200 is configured by omitting speakers corresponding to the speakers 127L and 127R that are supertweeters that output non-audible sound bands in the left strong crosstalk sound signal and the right strong crosstalk sound signal. .

  The speaker 211L and the speaker 212L, and the speaker 211R and the speaker 212R are formed in an integral enclosure type, similar to the speaker 201L and the speaker 202L, and the speaker 201R and the speaker 202R. The speaker 213L and the speaker 213R are formed in an enclosure type that is integrally formed in a state where they are arranged in the horizontal direction. Note that these speakers 211L, 211R, 212L, 212R, 213L, and 213R are also integrated with the parallel portion 109a and the inclined portion 109b in the same manner as the speaker 106L and the speaker 107L and the speaker 106R and the speaker 107R in the first embodiment. Of course, it may be formed in an enclosure type.

  The speakers 201L, 201R, 202L, 202R, the speakers 211L, 211R, 212L, 212R, and the speakers 213L, 213R are relatively closer to the listener U than the speakers on the high sound side. The speaker that is arranged and outputs the left strong crosstalk sound signal and the right strong crosstalk sound signal, respectively, is closer to the listener U than the speaker that outputs the left weak crosstalk sound signal and the right weak crosstalk sound signal, respectively. Is arranged.

  Specifically, the speakers 213L and 213R that respectively output the left strong crosstalk sound signal and the right strong crosstalk sound signal in the heavy bass band are arranged at positions closest to the listener U. Speakers 211L, 211R, 212L, and 212R that respectively output a left strong crosstalk sound signal and a right strong crosstalk sound signal in the middle and high frequency bands are disposed behind the speakers 213L and 213R. Speakers 201L, 201R, 202L, and 202R that respectively output a left weak crosstalk sound signal and a right weak crosstalk sound signal in the middle and high sound bands are arranged behind the speakers 211L, 211R, 212L, and 212R. The speakers 112L and 112R that output the left weak crosstalk non-audible sound signal and the right weak crosstalk non-audible sound signal, respectively, are disposed between the speakers 211L, 211R, 212L, and 212R and the speakers 201L, 201R, 202L, and 202R. Yes.

  In this case, the speakers 112L and 112R, the speakers 201L, 201R, 202L, and 202R and the speakers 211L, 211R, 212L, and 212R are placed on the stand 300. The stand 300 is a mounting table with casters that supports speakers at different height positions in the vertical direction. In this case, the stand 300 is arranged such that the middle stage and the uppermost stage are shifted rearward (right side in the drawing) with respect to the lowermost stage. The stand 300 is provided for each of the left and right speakers. The stand 300 supports the speakers 211L, 211R, 212L, and 212R at the bottom, supports the speakers 112L and 112R at the middle, and supports the speakers 201L, 201R, 202L, and 202R at the top. . The speakers 213L and 213R that output the left strong crosstalk sound signal and the right strong crosstalk sound signal in the deep bass band, respectively, are the left speaker 112L, the speakers 201L and 202L, the speakers 211L and 212L, and the right speaker 112R, It is arranged between the speakers 201R, 202R and the speakers 211R, 212R (preferably in the middle part).

(Operation of the sound reproduction system 200)
Next, the operation of the sound reproduction system 200 configured as described above will be described. A listener U who listens to music (singing or playing) using the sound reproduction system 200 operates the crosstalk adjusters 121a and 122a after turning on the power of the sound reproduction system 200, as in the first embodiment. Thus, the attenuation rate of each attenuation circuit in the crosstalk portion L121 and the crosstalk portion 122 is set. Then, the listener U sets and reproduces the original sound recording medium 101a in the sound source reproduction device 101.

  As a result, the speakers 201L, 201R, 202L, and 202R are weak crosstalk audible sounds in which the audible sound components respectively extracted from the left and right original sound signals recorded on the original sound recording medium 101a are slightly crosstalked with each other. The reproduced sound is output to the listener U for each frequency band of high and medium and low sounds (sound wave output step according to the present invention).

  Also, the speakers 112L and 112R are weakly crosstalk inaudible reproduced sounds obtained by slightly crosstalking the respective inaudible sound components extracted from the left original sound signal and the right original sound signal recorded on the original sound recording medium 101a. Are output toward the listener U (sound wave output step according to the present invention).

  Also, the speakers 211L, 211R, 212L, 212R, 213L, and 213R mutually reproduce the audible sound components extracted from the left original sound signal and the right original sound signal recorded on the original sound recording medium 101a with the weak crosstalk audible reproduced sound. The strong crosstalk audible reproduced sound that has been crosstalked more than the amount of crosstalk is output to the listener U for each of the high, middle and low frequency bands (sonic wave output step according to the present invention).

  As a result, the listener U performs the crosstalk along with the two-channel weak crosstalk audible reproduction sound close to the substantially original sound slightly including the crosstalk and the weak crosstalk non-audible reproduction sound close to the substantially original sound slightly including the crosstalk. It is possible to listen to music by receiving audible reproduction sound of two channels including strong crosstalk clearly.

  As can be understood from the above description of the operation, according to the second embodiment, the sound reproduction system 200 is a two-channel weak crosstalk audible reproduction sound close to the original sound with respect to the listener U, a weak cross close to the original sound. Three types of sound waves, that is, a non-talk audible reproduction sound and a two-channel strong crosstalk audible reproduction sound clearly including crosstalk, are output via a speaker. As a result, according to experiments conducted by the present inventors, it is possible to reproduce the music information at concerts and live performances with high reproducibility for the listener, compared with the conventional sound reproduction system, thereby improving the sense of reality. confirmed.

  Furthermore, in carrying out the present invention, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the object of the present invention. In addition, in each modification demonstrated below, the same code | symbol is attached | subjected to the component similar to the said embodiment, and description is abbreviate | omitted suitably.

  For example, in each of the above-described embodiments, the sound reproduction systems 100 and 200 are configured to output a weak crosstalk non-audible reproduction sound and / or a strong crosstalk non-audible reproduction sound obtained by crosstalking the non-audible sound. However, the sound reproduction systems 100 and 200 do not necessarily need to crosstalk non-audible sounds, and may be configured to output the original sound without crosstalk.

  Further, in each of the above embodiments, the crosstalk portion L102a and the crosstalk portion R102b are configured to crosstalk each one-third of the left original sound signal and the right original sound signal to the right original sound signal and the left original sound signal. That is, the crosstalk portion L102a and the crosstalk portion R102b correspond to the weak crosstalk portion according to the present invention. The crosstalk portion L102a and the crosstalk portion R102b may be added in a voltage ratio exceeding 0 to 1/30 of the signal amount to which the signal amount to be added is added.

  Further, in each of the above embodiments, the crosstalk unit L121 and the crosstalk unit R122 are configured to cross-talk each half of the left original sound signal and the right original sound signal to the right original sound signal and the left original sound signal. That is, the crosstalk portion L121 and the crosstalk portion R122 correspond to the strong crosstalk portion according to the present invention. The crosstalk section L121 and the crosstalk section R122 are configured to crosstalk at least 30th of each of the left original sound signal and the right original sound signal to the right original sound signal and the left original sound signal. do it.

  Further, in the above embodiment, the sound reproduction systems 100 and 200 each include three or two each to output the weak crosstalk audible reproduction sound and the strong crosstalk audible reproduction sound for every three or two frequency bands. Each speaker was provided and configured. However, the sound reproduction systems 100 and 200 can also be configured so that the weak crosstalk audible reproduction sound and the strong crosstalk audible reproduction sound are speakers of one frequency band, that is, a full-range speaker.

  Further, in each of the above embodiments, the sound source reproduction device 101 is configured to output the left original sound signal and the right original sound signal including the left non-audible sound signal representing the non-audible sound and the right non-audible sound signal, respectively. That is, the non-audible sound is recorded on the original sound recording medium 101a in two channels corresponding to the left and right directions of the person. However, the sound source reproduction apparatus 101 is configured to output at least a left original sound signal and a right original sound signal that represent audible sound in two channels, and a non-audible sound signal that represents non-audible sound in one channel, respectively. Just do it. Therefore, the sound reproduction system 100 can also be configured to output non-audible sound from only one speaker. The sound source reproduction device 101 can also be configured by two separate devices, a sound source reproduction device 101 that outputs only audible sound and a sound source reproduction device 101 that outputs only non-audible sound.

  In the embodiment, the preamplifier 120 includes the crosstalk unit L121, the crosstalk unit R122, and the crosstalk adjusters 121a and 122a. Accordingly, the preamplifier 120 can generate the left crosstalk sound signal and the right crosstalk sound signal with a desired crosstalk amount using the left original sound signal and the right original sound signal. However, the crosstalk portion L121 and the crosstalk portion R122 do not necessarily need to be configured as circuits that actively generate the left crosstalk sound signal and the right crosstalk sound signal. That is, the crosstalk portion L121 and the crosstalk portion R122 only need to be configured so that the left original sound signal and the right original sound signal interfere with each other and receive crosstalk. Therefore, for example, by placing the amplifier circuit for amplifying the left original sound signal and the amplifier circuit for amplifying the right original sound signal in the preamplifier 120 close to each other, the amplifier circuits interfere with each other electrically or magnetically so that the left crosstalk A sound signal and a right crosstalk sound signal can also be generated.

  Further, the crosstalk unit L121 and the crosstalk unit R122 include the crosstalk adjusters 121a and 122a so that the crosstalk amount can be varied, and the crosstalk amount (in other words, the attenuation rate of the attenuation circuit). May be fixedly set to a predetermined value. In this case, the amount of crosstalk fixedly set in the crosstalk portion L121 and the crosstalk portion R122 is an amount that exceeds at least 1/30 in terms of voltage ratio with respect to the original left-side original sound signal and right-side original sound signal, and preferably Is 10% or more and 80% or less, more preferably 30% or more and 60% or less, and further preferably 40% or more and 50% or less.

  In the above embodiment, the sound source reproducing device 101 is configured by a device that reproduces the original sound recording medium 101a. However, the sound source reproduction device 101 has a non-audible sound signal representing a non-audible sound that cannot be heard by the human ear and a audible sound that can be heard by the human ear. The left original sound signal and the right original sound signal represented by two channels corresponding to the left and right ears of the person may be output.

  Therefore, the sound reproduction systems 100 and 200, for example, connect the sound source reproduction device 101 including a sound collection device such as a microphone for two channels installed in a concert or live venue from wired or wireless (for example, the Internet or a wireless telephone line). The preamplifier 102 and the preamplifier 120 can be connected to each other via transmission lines (not shown). According to this, the sound reproduction systems 100 and 200 reproduce the music information of the concert venue or the live venue in real time, or by reproducing the music information in a storage device (not shown) at a timing desired by the listener U. Can reproduce the sound field of the venue in a place or room other than the venue.

U ... listener,
100 ... sound reproduction system,
DESCRIPTION OF SYMBOLS 101 ... Sound source reproduction apparatus, 101a ... Original sound recording medium, 102 ... Preamplifier, 102a ... Crosstalk part L, 102b ... Crosstalk part R, 103 ... Active filter amplifier, 104a-104c ... Power amplifier, 105L, 105R, 106L, 106R 107L, 107R ... speaker, 108a, 108b ... speaker body, 109 ... enclosure, 109a ... parallel part, 109b ... inclined part, 109c ... reinforcing plate,
110 ... Power amplifier, 111 ... High pass filter, 112L, 112R ... Speaker,
DESCRIPTION OF SYMBOLS 120 ... Preamplifier, 121 ... Crosstalk part L, 122 ... Crosstalk part R, 121a, 122a ... Crosstalk amount regulator, 123 ... Power amplifier, 124L, 124R, 125L, 125R, 126L, 126R, 127L, 127R ... Speaker 128 ... Network,
200 ... sound reproduction system,
201L, 201R, 202L, 202R, 211L, 211R, 212L, 212R, 213L, 213R ... speakers,
300 ... Stand.

Claims (6)

The left and right ears of a person, including non-audible sound signals that represent non-audible sounds that cannot be heard by the human ear at frequencies above the audible sounds that the human can hear, and the audible sounds that the human can hear A sound source playback device that outputs a left-side original sound signal and a right-side original sound signal represented by two channels corresponding to
When the left original sound signal and the right original sound signal are respectively input and a part of the signals is added to each other, the amount of the added signal amount is less than 1/30 of the voltage ratio with respect to the added signal amount In addition to the weak crosstalk section that generates and outputs the left weak crosstalk sound signal and the right weak crosstalk sound signal,
When the left original sound signal and the right original sound signal are respectively input and a part of the signal is added to each other, an amount exceeding 30% in voltage ratio with respect to the signal amount on the side to which the signal amount on the adding side is added In addition, a strong crosstalk unit that generates and outputs a left strong crosstalk sound signal and a right strong crosstalk sound signal, and
An amplifier that amplifies each of the left weak crosstalk sound signal, the right weak crosstalk sound signal, the left strong crosstalk sound signal, the right strong crosstalk sound signal, and the non-audible sound signal;
The left weak crosstalk sound signal amplified by the amplifier, the right weak crosstalk sound signal, the left strong crosstalk sound signal, the right strong crosstalk sound signal, and the non-audible sound signal are respectively independent as sound waves. And an output speaker. The sound reproduction system according to claim 1, further comprising:
A band-pass filter for inputting the left original sound signal and the right original sound signal and extracting the audible sound as a high sound and a medium low sound, or a high sound, a medium sound and a low sound, respectively;
The speaker is
The high-pitched sound and the medium-low sound, or the left-side original sound signal and the right-side original sound signal for each of the high-pitched sound, the medium sound, and the low-pitched sound are provided for each of the left-side original sound signal and the right-side original sound signal. The sound reproducing system is arranged on the side closer to the listener than the speaker. In the sound reproduction system according to claim 1 or 2,
The speaker is
Provided for each of the left weak crosstalk sound signal, the right weak crosstalk sound signal, the left strong crosstalk sound signal, and the right strong crosstalk sound signal,
The speaker that outputs the left strong crosstalk sound signal and the right strong crosstalk sound signal is disposed closer to the listener than the speaker that outputs the left weak crosstalk sound signal and the right weak crosstalk sound signal, respectively. The sound reproduction system characterized by the above-mentioned. In the sound reproduction system according to any one of claims 1 to 3,
The speaker is
A speaker body that converts electrical signals into sound waves;
A box-shaped enclosure that supports the speaker body in a state of covering the opposite side of the speaker body from the side that emits the sound wave;
The enclosure is
Parallel portions in which the inner side surfaces of the left and right side surfaces extend in parallel from the speaker body side toward the rear, and
An acoustic reproduction system comprising: an inclined portion that is inclined inward so as to approach each other from the rear end portion of the parallel portion toward the rear. In the sound reproduction system according to claim 4,
The speaker is
The sound reproduction system according to claim 1, wherein the inclined portion of the enclosure is formed of an arcuate curved surface. The left and right ears of a person, including non-audible sound signals that represent non-audible sounds that cannot be heard by the human ear at frequencies above the audible sounds that the human can hear, and the audible sounds that the human can hear A sound source reproduction step for outputting a left original sound signal and a right original signal represented by two channels corresponding to
When the left original sound signal and the right original sound signal are respectively input and a part of the signals is added to each other, the amount of the added signal amount is less than 1/30 of the voltage ratio with respect to the added signal amount A weak crosstalk step that generates and outputs a left weak crosstalk sound signal and a right weak crosstalk sound signal, respectively,
When the left original sound signal and the right original sound signal are respectively input and a part of the signal is added to each other, an amount exceeding 30% in voltage ratio with respect to the signal amount on the side to which the signal amount on the adding side is added In addition to the above, a strong crosstalk step for generating and outputting a left strong crosstalk sound signal and a right strong crosstalk sound signal,
An amplification step of amplifying the left weak crosstalk sound signal, the right weak crosstalk sound signal, the left strong crosstalk sound signal, the right strong crosstalk sound signal, and the non-audible sound signal;
The left weak crosstalk sound signal, the right weak crosstalk sound signal, the left strong crosstalk sound signal, the right strong crosstalk sound signal, and the non-audible sound signal amplified by the amplification step are respectively independent as sound waves. And a sound wave output step for outputting from a speaker.

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