JP2015198422A - Acoustic reproduction system and acoustic reproduction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an acoustic reproduction system and acoustic reproduction method capable of improving presence by reproducing music information on a concert, live, or the like with high reproductivity.SOLUTION: An acoustic reproduction system 100 comprises a sound source reproduction device 101 for individually reproducing a left side original sound signal and a right side original sound signal recorded in an original sound recording medium 101a. The left side original sound signal and the right side original sound signal reproduced by the sound source reproduction device 101 are individually reproduced and output, as original sound audible reproduction sound and original sound inaudible reproduction sound, through a preamplifier 102. The left side original sound signal and the right side original sound signal reproduced by the sound source reproduction device 101 are converted, by preamplifier 120, to a left side crosstalk sound signal and a right side crosstalk sound signal obtained by the left side original sound signal and the right side original sound signal adding part of the respective signals to each other, and are individually reproduced and output as crosstalk audible reproduction sound and crosstalk inaudible reproduction sound.

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, Patent Documents 1 and 2 below disclose an acoustic reproduction system that adds a part of each of left and right two-channel music signals corresponding to human ears to each other and outputs the result to a listener.

JP 59-86400 A JP 04-368100 A

  However, in this type of sound reproduction system as described in Patent Documents 1 and 2 above, high reproducibility of music information and improvement in 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 that outputs a left-side original sound signal and a right-side original sound signal represented by two channels corresponding to the left and right ears of humans, including an audible sound, and a left-side original sound signal and the right-side original sound signal, respectively. A crosstalk unit that outputs a left crosstalk sound signal and a right crosstalk sound signal, each of which includes a part of the signal, and a left original sound signal, a right original sound signal, a left crosstalk sound signal, a right crosstalk sound signal, An amplifier that amplifies each non-audible sound signal, and the left original sound signal, right original sound signal, left crosstalk sound signal, and right crosstalk sound signal amplified by the amplifier. And certain non-audible sound signals to and a speaker for outputting independently as sound waves respectively.

  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 causes the listener to crosstalk at least the audible sound between the audible reproduced sound of the audible sound in the two-channel original sound and the two-channel original sound. Three types of sound waves, each crosstalk reproduction sound and non-audible non-audible reproduction sound, are output via a speaker. As a result, according to the experiments by the present inventors, music information in concerts and live performances is compared with a conventional sound reproduction system that outputs a reproduced sound that is simply crosstalked between two channels of original sound to a listener. It was confirmed that it was possible to improve the sense of reality by playing with high reproducibility. For this reason, the exact cause is unknown, but the type of sound waves (in other words, frequency components) of the original sound that the listener feels, each crosstalk reproduced sound that has been crosstalked, and inaudible reproduced sound. 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 actual concert venues and live venues.

  According to another aspect of the present invention, in the sound reproduction system, the sound source reproduction device includes a left-side non-audible sound signal and a right-side non-audible sound signal of two channels in which the non-audible sound signal corresponds to the left-right direction of the person. The crosstalk unit inputs the left non-audible sound signal and the right non-audible sound signal respectively, and outputs the left crosstalk non-audible sound signal and the right crosstalk non-audible sound signal obtained by adding a part of each signal to each other. There is to do.

  According to another aspect of the present invention configured as described above, in the sound reproduction system, the crosstalk unit transmits two channels of non-audible sound signals, that is, a left non-audible sound signal and a right non-audible sound signal to each other. A left crosstalk non-audible sound signal and a right crosstalk non-audible sound signal to which a part of the signal is added are output. That is, the sound reproduction system comprises a total of four types by configuring the crosstalk reproduction sound of the three types of sound waves as a crosstalk audible reproduction sound composed of audible sounds and a crosstalk non-audible reproduction sound composed of non-audible sounds. Are output via a speaker. Thereby, the sound reproduction system can reproduce music information at concerts and live performances with higher reproducibility to further improve the sense of reality.

  Another feature of the present invention is that in the sound reproduction system, an active filter is further provided 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. And a speaker is provided for each of the left original sound signal and the right original sound signal for each of the high and middle / low sounds, or the high, medium and low sounds. 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.

  According to another aspect of the present invention configured as described above, the sound reproduction system is configured to reproduce at least one of the original sound representing the audible sound and the crosstalk reproduced sound representing the audible sound as a high sound and a medium sound. Since the output is divided into low sounds, high sounds, medium sounds, and low sounds, music information in concerts and live performances can be reproduced with higher reproducibility to further improve the sense of reality.

  Another feature of the present invention is that, in the sound reproduction system, the amplifier includes an amplifier that amplifies the left original sound signal and an amplifier that amplifies the right original sound signal physically independent of each other. .

  According to another aspect of the present invention configured as described above, the sound reproduction system includes an amplifier that amplifies the left original sound signal and an amplifier that amplifies the right original sound signal, which are physically independent of each other. Therefore, it is possible to output the original sound reproduction sound that accurately reproduces the original sound by effectively suppressing the crosstalk phenomenon between the left original sound signal and the right original sound signal.

  Another feature of the present invention is that, in the sound reproduction system, the crosstalk section includes crosstalk adjusting means for adjusting the amount of signals added to each other.

  According to another aspect of the invention configured as described above, the sound reproduction system includes a crosstalk unit that adjusts a signal amount that the crosstalk unit adds between the left original sound signal and the right original signal, that is, a crosstalk amount that adjusts the crosstalk amount. Since the talk adjustment means is provided, the playback sound can be changed according to the listener's preference and the playback environment of the playback sound, and music information at concerts and live performances can be played back with higher reproducibility. Can be improved. In addition, in the sound reproduction system, when the non-audible sound signal is composed of the left non-audible sound signal and the right non-audible sound signal, the crosstalk portion is located between the left non-audible sound signal and the right non-audible sound signal. Since the amount of signal added to each other, that is, the amount of crosstalk can be adjusted, the playback sound can be changed according to the listener's preference and the playback environment of the playback sound. Reproduction with high reproducibility can improve the sense of reality.

  Another feature of the present invention is that in the sound reproduction system, the speaker outputs a left crosstalk sound signal and a right crosstalk sound signal outside the speaker that outputs the left original sound signal and the right original sound signal, respectively. It is in having arranged each.

  According to another aspect of the present invention configured as described above, the sound reproduction system outputs the left crosstalk sound signal and the right crosstalk sound signal to the outside of the speaker that outputs the left original sound signal and the right original sound signal, respectively. Since the speakers are respectively arranged, the music information is compared to the case where the speakers outputting the left original sound signal and the right original sound signal are arranged outside the speaker outputting the left crosstalk sound signal and the right crosstalk sound signal, respectively. We were able to confirm higher reproducibility and improved realism. Note that the outside of the speaker means that the speaker is disposed further outward in the left-right direction of the listener with respect to the speaker disposed toward the listener.

  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, A crosstalk step that outputs a left crosstalk sound signal and a right crosstalk sound signal with a part added, left original sound signal, right original sound signal, left crosstalk sound signal, right crosstalk sound signal, and non-audible sound signal Amplifying step for amplifying each of them, left original sound signal amplified by the amplifying step, right original sound signal, left crosstalk sound signal, right cross toe signal It lies in including the acoustic output step of outputting from the independent speaker sound signal and a non-audible sound signal as a sound wave respectively. According to this, it is possible to expect the same effect as the sound reproducing device.

  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 one embodiment of the present invention. It is a mimetic diagram showing roughly the system configuration of the sound reproduction system concerning the modification of the present invention. It is a schematic diagram which shows roughly a part of system configuration | structure of the sound reproduction system which concerns on the other modification of this invention.

  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 a sound reproduction system 100 according to 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 is an amplifying apparatus that inputs the left original sound signal and the right original sound signal output from the sound source reproduction apparatus 101, amplifies the left original sound signal, and the right original sound signal, respectively, and outputs the amplified signal. In this case, the preamplifier 102 is shielded so that an electric circuit for amplifying the left original sound signal and an electric circuit for amplifying the right original sound signal do not interfere with each other electrically and magnetically in one housing. . Further, the preamplifier 102 includes a volume (not shown) for manually adjusting the output magnitudes of the left and right original sound signals to be output. 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 original sound signal and the right original sound signal output from the preamplifier 102 for each of a plurality of frequency bands, and mainly includes a resistance element, a capacitor element, and an amplification element. It is configured. In the present embodiment, the active filter amplifier 103 outputs the left-side original sound signal and the right-side original sound signal for each frequency band of high sound (8400 Hz to 35 kHz), medium sound (420 Hz to 8400 Hz), and low sound (less than 420 Hz), respectively. 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 original sound signal and the right original 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 receive the left original sound signal and the right original sound signal for each frequency band output from the power amplifiers 104a to 104c, respectively, and input the left original sound signal and the right original sound signal. Are converted into sound waves corresponding to each of the above and output. 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. Each is arranged oppositely.

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

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

  The speakers 112L and 112R respectively input the left non-audible sound signal and the right non-audible sound signal output from the high-pass filter 111, and convert them into sound waves respectively corresponding to the left non-audible sound signal and the right non-audible sound signal. It is a device that outputs. 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 added left crosstalk sound signal and right crosstalk sound signal. 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 crosstalk sound signal and a right 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 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 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). . 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 crosstalk non-audible sound signal and a right crosstalk non-audible sound signal. Has been.

  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. 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 crosstalk sound signal and the right 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 crosstalk sound signal and the right crosstalk sound signal output from the power amplifier 123, respectively. It is a device that converts and outputs sound waves corresponding to the crosstalk sound signals. 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 signal (8400 Hz to 35 kHz) in the left crosstalk sound signal and the right crosstalk sound signal. The speakers 125L and 125R are so-called squawkers that the network 128 extracts and outputs signals in the middle sound band (420 Hz to 8400 Hz) in the left crosstalk sound signal and the right crosstalk sound signal, respectively. The speakers 126L and 126R are so-called woofers that the network 128 extracts and outputs signals in the low frequency band (less than 420 Hz) in the left crosstalk sound signal and the right 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 crosstalk sound signal and the right crosstalk sound signal, respectively.

  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.

(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 crosstalk amount is 5% or more and 40% or less, more preferably 10% or more and 30% or less, more preferably 15%, respectively, with respect to the volume of the original left side original sound signal and right side original sound signal. The content is preferably 25% or less. In the present embodiment, the listener U sets the crosstalk rate representing the ratio of the left and right crosstalk amounts to 20%.

  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 120 performs voltage amplification on the left original sound signal and the right original sound signal output from the sound source reproduction device 101, respectively, and outputs them to the active filter amplifier 103 and the power amplifier 110 (amplification step according to the present invention).

  The active filter amplifier 103 divides the left original sound signal and the right original 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-side original sound signal and right-side original sound signal and output them to the speakers 105L, 105R, 106L, 106R, 107L, 107R, respectively (amplification step according to the present invention). As a result, the speakers 105L, 105R, 106L, 106R, 107L, and 107R generate the original audible reproduced sound obtained by extracting the audible sound from the left original sound signal and the right original sound signal recorded in the original sound recording medium 101a for each frequency band. Are output respectively (sonic wave output step according to the present invention).

  Further, the power amplifier 110 power-amplifies the left original sound signal and the right original 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 non-audible sound signal and the right non-audible sound signal, which are signals in the non-audible sound band, from the left original sound signal and the right original sound signal, and outputs them to the speakers 112L and 112R, respectively. As a result, the speakers 112L and 112R respectively output the original non-audible reproduced sound obtained by extracting the non-audible sound in the left original sound signal and the right original sound signal recorded in the original sound recording medium 101a to the listener U (according to the present invention). Sound wave output step).

  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 side original sound signal is generated by adding a part to the left side original sound signal, and a part of the left side original sound signal is added to the right side original sound signal to generate a right side crosstalk sound signal. (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 power of the input left crosstalk sound signal and right crosstalk sound signal and outputs them to the speakers 124L, 124R, 125L, 125R, 126L, 126R, 127L, and 127R (amplification step according to the present invention). ). As a result, the speakers 124L, 124R, 125L, 125R, 126L, 126R, 127L, and 127R generate high, medium, low, and inaudible sounds from the left crosstalk sound signal and the right crosstalk sound signal output from the power amplifier 123. Are extracted and output to the listener U (sound wave output step according to the present invention).

  More specifically, the speakers 124L, 124R, 125L, 125R, 126L, and 126R output a crosstalk audible reproduction sound obtained by crosstalking the audible sound to the listener U for each of high, medium, and low sounds. The speakers 127L and 127R output the crosstalk non-audible reproduction sound obtained by crosstalking the non-audible sound to the listener U, respectively.

  As a result, the listener U can hear two-channel crosstalk including the crosstalk together with the two-channel original sound audible reproduction sound without the crosstalk and the two-channel original non-audible reproduction sound without the crosstalk. Two-channel crosstalk non-audible reproduction sound including reproduction sound and crosstalk is received. In this case, the listener U adjusts the volumes (not shown) provided in the preamplifier 102 and the preamplifier 120, respectively, so that the audible reproduction sound including the audible reproduction sound that does not include crosstalk and the crosstalk with respect to the non-audible reproduction sound is included. And the proportion of non-audible playback sound can be adjusted. According to the experiments by the present inventors, the ratio of the audible and non-audible playback sounds that do not include crosstalk to the audible and non-audible playback sounds including crosstalk is 9 to 1 to 7 pairs. A ratio of 3 is preferred.

  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 above embodiment, the sound reproduction system 100 allows each of the original audible reproduction sound of the audible sound in the two-channel original sound and the non-audible sound in the original sound to the listener U. Four types of non-audible playback sound, each of which is a crosstalk audible playback sound in which the audible sound is crosstalked between two channels of the original sound, and each crosstalk that is a non-audible playback sound in which the non-audible sound is crosstalked between the two channels of the original sound Are output via a speaker. As a result, according to the experiments by the present inventors, music information in concerts and live performances is compared with a conventional sound reproduction system that outputs a reproduced sound that is simply crosstalked between two channels of original sound to a listener. It was confirmed that it was possible to improve the sense of reality by playing with high reproducibility. For this reason, the exact cause is unknown, but the audible and non-audible playback sounds of the original sound that the listener feels, and the sound wave types of the audible and non-audible cross-talk playback sounds in which the original sound is crosstalked (in other words, This is because the frequency component) is close to the type of sound wave that the listener receives directly and indirectly from the sound source to the ears and body in an actual concert venue or live venue.

  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 the above-described embodiment, the sound reproduction system 100 outputs the original sound audible reproduction sound and the crosstalk audible reproduction sound for each of three frequency bands, that is, for each of the high sound, the medium sound, and the low sound. Speakers 105L, 105R, 106L, 106R, 107L, 107R and speakers 124L, 124R, 125L, 125R, 126L, 126R are provided. However, the sound reproduction system 100 converts the original sound audible reproduction sound and the crosstalk audible reproduction sound into two frequency band speakers, for example, two high-frequency and middle-low sound speakers, one frequency band speaker, that is, a full-range speaker. A speaker can also be used.

  In the above embodiment, the sound reproduction system 100 generates the non-audible reproduction sound of the crosstalk using the preamplifier 120 (including the crosstalk unit L121 and the crosstalk unit R122), the power amplifier 123, and the speakers 127R and 127R. It was configured as follows. However, if the sound reproduction system 100 is configured to generate at least the original sound audible reproduction sound, the original sound non-audible reproduction sound, and the crosstalk audible reproduction sound, the sound in a concert or live performance can be compared with the sound reproduction system according to the related art. Information can be reproduced with high presence. That is, the sound reproduction system 100 can omit the configuration for generating and outputting the crosstalk non-audible reproduction sound obtained by crosstalking the non-audible sound.

  In the above embodiment, the sound reproduction system 100 is configured by providing the networks 128 to the speakers 124L, 124R, 125L, 125R, 126L, 126R, 127L, and 127R, respectively. However, the sound reproduction system 100 can be configured by omitting the network 127 and providing an active filter amplifier and a power amplifier corresponding to the active filter amplifier 103 and the power amplifiers 104a to 104c.

  In the above embodiment, in the sound reproduction system 100, the preamplifier 102 is manually configured by housing the circuit for amplifying the left original sound signal and the circuit for amplifying the right original sound signal in one casing. However, the preamplifier 102 only needs to be configured so that the mutual signals, that is, the left original sound signal and the right original sound signal interfere with each other and do not receive crosstalk. Accordingly, in the preamplifier 102, the circuit for amplifying the left original sound signal and the circuit for amplifying the right original sound signal can be configured as separate bodies that are physically independent of each other. According to this, the preamplifier 102 can suppress the crosstalk with higher accuracy than the case where the preamplifier 102 is configured with one housing.

  In the above embodiment, the preamplifier 120 and the power amplifier 123 are configured separately from each other. However, the preamplifier 120 and the power amplifier 123 can be configured as one device, that is, the pre-main amplifier 130 as shown in FIG. In this case, the pre-main amplifier 120 ′ inputs the left original sound signal and the right original sound signal output from the sound source playback device 101, respectively, amplifies the voltage and power, and mutually exchanges between the left original sound signal and the right original sound signal. The left crosstalk sound signal and the right crosstalk sound signal obtained by adding a part of the signals to each other are output.

  In the above embodiment, the sound source reproducing 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 original sound reproducing apparatus 101 is configured to output at least the left and right original sound signals represented by the audible sound wp2 channel and the non-audible sound signal representing the non-audible sound by one channel, respectively. That's fine. 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.

  Further, in the above embodiment, the sound source reproduction device 101 uses the speakers 124L, 124R, 125L, 125R, 126L, 126R, 127L, and 127R with respect to the speakers 105L, 105R, 106L, 106R, 107L, and 107R. Each was arranged on the outside in the direction. Thus, according to the present inventors, the speakers 105L, 105R, 106L, 106R, 107L, and 107R are placed outside the listener U in the left-right direction with respect to the speakers 124L, 124R, 125L, 125R, 126L, 126R, 127L, and 127R. Compared to the case where each was placed, the higher reproducibility of music information and the improvement of presence were confirmed. However, in the sound reproduction system 100 according to the present invention, the speakers 105L, 105R, 106L, 106R, 107L, and 107R are connected to the speakers 124L, 124R, 125L, 125R, 126L, 126R, 127L, and 127R in the left-right direction. Even in the case where each of the speakers is arranged, the effect of the present invention has been confirmed, and such a speaker arrangement is not excluded.

  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. That is, the crosstalk portion L121 and the crosstalk portion R122 correspond to the crosstalk portion according to the present invention, and the crosstalk adjusters 121a and 122a correspond to the crosstalk adjusting means according to the present invention.

  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 arranging 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, the amplifier circuits interfere with each other electrically or magnetically so that the left crosstalk is generated. 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 more preferably 5% or more and 40% or less, respectively, with respect to the volume of the original left original sound signal and right original sound signal. Is set in the range of 10% to 30%, more preferably 15% to 25%.

  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, for example, as shown in FIG. 3, the sound reproduction system 100 uses a sound source reproduction apparatus 101 including a sound collection apparatus such as a microphone for two channels installed in a concert or live venue P as wired or wireless (for example, the Internet). And a preamplifier 102 and a preamplifier 120 via a transmission line 130 comprising a radio telephone line). According to this, the sound reproduction system 100 reproduces 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. The sound field of the venue P can be reproduced in a place or room other than P. In FIG. 3, the sound reproduction system 100 is shown by omitting the configuration after the preamplifier 102 and the preamplifier 120.

P ... Venue,
DESCRIPTION OF SYMBOLS 100 ... Sound reproduction system, 101 ... Sound source reproduction apparatus, 101a ... Original sound recording medium, 102 ... Preamplifier, 103 ... Active filter amplifier, 104a-104c ... Power amplifier, 105L, 105R, 106L, 106R, 107L, 107R ... Speaker
110 ... Power amplifier, 111 ... High pass filter, 112L, 112R ... Speaker,
120 ... Preamplifier, 120 '... Pre-main amplifier, 121 ... Crosstalk part L, 122 ... Crosstalk part R, 121a, 122a ... Crosstalk amount adjuster, 123 ... Power amplifier, 124L, 124R, 125L, 125R, 126L, 126R 127L, 127R ... speaker, 128 ... network,
130: Transmission line.

Claims (7)

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
A crosstalk unit for inputting the left original sound signal and the right original sound signal, respectively, and outputting a left crosstalk sound signal and a right crosstalk sound signal obtained by adding a part of the signals to each other;
An amplifier for amplifying the left original sound signal, the right original sound signal, the left crosstalk sound signal, the right crosstalk sound signal, and the non-audible sound signal, respectively;
A speaker for independently outputting the left original sound signal, the right original sound signal, the left crosstalk sound signal, the right crosstalk sound signal, and the non-audible sound signal amplified by the amplifier as sound waves, respectively. Sound reproduction system characterized by. The sound reproduction system according to claim 1,
The sound source reproducing device is
The non-audible sound signal is composed of two channels of a left non-audible sound signal and a right non-audible sound signal corresponding to the left and right directions of the person,
The crosstalk part is
The left-side non-audible sound signal and the right-side non-audible sound signal that are obtained by inputting the left-side non-audible sound signal and the right-side non-audible sound signal, respectively, and adding a part of the signals to each other are output. Sound reproduction system. The sound reproduction system according to claim 1 or 2, further comprising:
An active filter that inputs the left original sound signal and the right original sound signal and extracts 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
A sound reproduction system provided for each of the left original sound signal and the right original sound signal for each of the high sound and the medium / low sound, or the high sound, the medium sound, and the low sound. In the sound reproduction system according to any one of claims 1 to 3,
The amplifier is
An acoustic reproduction system, wherein an amplifier that amplifies the left original sound signal and an amplifier that amplifies the right original sound signal are provided physically independently of each other. In the sound reproduction system according to any one of claims 1 to 4,
The crosstalk part is
A sound reproduction system comprising crosstalk adjusting means for adjusting the amount of signals added to each other. In the sound reproduction system according to any one of claims 1 to 5,
The speaker is
A sound reproduction system, wherein a speaker for outputting the left crosstalk sound signal and the right crosstalk sound signal is disposed outside a speaker for outputting the left original sound signal and the right original sound signal, respectively. 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
A crosstalk step of respectively inputting the left original sound signal and the right original sound signal and outputting a left crosstalk sound signal and a right crosstalk sound signal obtained by adding a part of the signals to each other;
An amplification step for amplifying the left original sound signal, the right original sound signal, the left crosstalk sound signal, the right crosstalk sound signal and the non-audible sound signal;
A sound wave output step for outputting the left original sound signal, the right original sound signal, the left crosstalk sound signal, the right crosstalk sound signal, and the non-audible sound signal amplified by the amplification step as sound waves from independent speakers, respectively. A sound reproduction method comprising:

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