EP0773530A2 - Spielgerät - Google Patents

Spielgerät Download PDF

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Publication number
EP0773530A2
EP0773530A2 EP96116952A EP96116952A EP0773530A2 EP 0773530 A2 EP0773530 A2 EP 0773530A2 EP 96116952 A EP96116952 A EP 96116952A EP 96116952 A EP96116952 A EP 96116952A EP 0773530 A2 EP0773530 A2 EP 0773530A2
Authority
EP
European Patent Office
Prior art keywords
rod
violin
vibration
bridge
voice coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96116952A
Other languages
English (en)
French (fr)
Other versions
EP0773530A3 (de
Inventor
Shiro c/o Niigata Stringed Instr. Corp. Hirokawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Niigata Stringed Instruments Corp
Original Assignee
Niigata Stringed Instruments Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Niigata Stringed Instruments Corp filed Critical Niigata Stringed Instruments Corp
Publication of EP0773530A2 publication Critical patent/EP0773530A2/de
Publication of EP0773530A3 publication Critical patent/EP0773530A3/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/42—Combinations of transducers with fluid-pressure or other non-electrical amplifying means
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10F—AUTOMATIC MUSICAL INSTRUMENTS
    • G10F1/00—Automatic musical instruments
    • G10F1/16—Stringed musical instruments other than pianofortes

Definitions

  • the present invention relates to a player apparatus for a high-fidelity reproduction of original sounds with the use of a stringed instrument such as a violin.
  • a speaker which comprises a bobbin having a cone-shaped vibration plate, a voice coil wound around one end of the bobbin and a magnet circuit combined with the voice coil.
  • the conventional speaker has had a problem such that unless the CG of the vibration plate is consistent with the driving center of the voice coil, the vibration plate would not vibrate properly, so that the original speech can no longer be precisely reproduced.
  • Japanese Patent Examined Publication No.57-56279 an apparatus which controls the amount of air entering from both sides of the central partition wall of a cylindrical voice coil in order to arbitrarily adjust the position of the vibration plate or the voice coil.
  • this type of the conventional speaker would reproduce speech through a vibration plate such as a cone paper, which, as a result, could not reproduce as vivid speech as the original ones. Consequently, there have been always some dissatisfaction at the audience end that with the conventional highest-grade speakers, yet they cannot listen to as vivid a musical performance as if they were present at a live concert.
  • the present invention is remarkably characterized by substituting the resonance mechanism of stringed instruments, more specifically so-called violin group instruments including a violin, a viola, a cello and a contrabass (or double bass) for the vibration plate of the conventional speaker.
  • a player apparatus of the invention is structured by a driving coil for converting speech current into mechanical vibration, a rod-like member of which the proximal end is connected to a vibrating part of the driving coil and one of the stringed instruments included in violin group having its bridge connected to the distal end of the rod-like member.
  • the mechanical vibration from the driving coil is propagated across the rod-like member to the bridge of the stringed instrument such as violin, whereby the speech can be reproduced through a resonating body of the stringed instrument as if the instrument were actually played.
  • the aforesaid driving coil comprises a magnet circuit and a voice coil which vibrates due to electromagnetic induction by the magnet circuit, said voice coil desirably being provided with a damper for controlling radial vibration.
  • a damper for controlling radial vibration.
  • the aforesaid magnet circuit constructing the driving coil may be provided with alnico-based magnet material rather than ferite-based one.
  • Alnico-based magnet material generally indicates excellent magnetic property, which is incorporated into the magnet circuit in order for the driving coil to precisely convert speech signals into mechanical vibration. In that case, owing to a plurality of dampers for control of the radial vibration of the voice coil, you do not have to prescribe the precise configuration or material of the aforesaid rod-like member.
  • the rod-like member may be connected to the vibration part so that the front-to-back vibration of the voice coil may be propagated to the axial direction of the rod-like member, while the rod-like member in turn be connected to the bridge so as to propagate the axial vibration of the rod-like member to the side-direction of the bridge.
  • the radial vibration of the voice coil being controlled by the damper(s)
  • only the front-to-back vibration of the voice coil can be propagated to the side-direction of the bridge, thereby effecting the vivid reproduction of speech which is heard as if the strings were actually rubbed against a bow.
  • the aforesaid rod-like member is, preferably, a metallic rod having a Pernambuco lumber combined therewith.
  • Pernambuco is a natural wood which is widely recognized as a raw material of a support member of a bow for rubbing the strings of a stringed instrument.
  • the Pernambuco lumber constructing a part of the rod-like member can effectively absorb undesirable resonant vibration unique to a metallic rod, while beautiful and serene speech can be reproduced out of a body of the stringed instrument as if the strings were actually rubbed against a bow.
  • Fig.1 through Fig .4 show a first embodiment of the present invention, of which Figs.1 to 3 show a general structure of the apparatus.
  • Reference numeral 1 designates a pedestal, 2 a casing provided at one side thereof, all of which are constructed by assembling wooden plates. Inside the casing 2 is provided a magnet circuit 7 comprising a bottom plate 4 having a center pole 3, an upper plate 5 and an annular magnet 6 provided therebetween, said magnet circuit 7 being supported by a metallic frame 8.
  • Reference numeral 9 designates a voice coil which is able to vibrate within a magnetic gap 10 of the magent circuit 7.
  • the conductor coil 9A When a speech current flows through a coil 9A of the voice coil 9 placed in a magentic field of the magentic circuit 7, the conductor coil 9A is displaced due to an electromagnetic induction, thus vibrating the voice coil 9 as a whole.
  • the aforesaid voice coil 9 and the magnetic circuit 7 construct a driving coil 11 for converting a speech current into a mechanical vibration.
  • Onto the distal end of the voice coil 9 is mounted a cylindrical cap 12 as an vibrating part of the driving coil 11, thus propagating the vibration outwards.
  • the diameter of the cap 12 is set at 53 mm.
  • Reference numeral 13 designates a damper which serves to support the voice coil 9 coaxially around the center pole 3, and thus to control unnecessary radial vibration of the voice coil 9.
  • an existing cone-type speaker is used with the vibrating plate thereof being removed therefrom, while aforesaid annular magnet 6 is made of ferite-based magnet material.
  • Reference numeral 21 is a rod-like member or a rod extending from the center of the cap 12 toward the outside of the casing 2.
  • the rod 21 comprises a first rod member 22 having its proximal end attached to the center of the cap 12, a second rod member 24 which is connected to the distal end of the first rod member 22 by a screw 23 and an interposing body 26 connected to the distal end of the rod member 24 by another screw 25.
  • the interposing body 26 comprises a first fixing member 27 which is tabular and attached to the second rod member 24 by the screw 25, and a second fixing member 29 which is removably mounted to the first fixing memeber 27 by a screw 28.
  • a non-slip members 30 such as a papersand, which can ensure the contact of the interposing member 26 with a hereinbelow-described bridge 45.
  • the mechanical vibration from the rod 21 can be precisely propagated to the bridge 45.
  • reference numeral 40 designates a resilient piece which is U-shaped to support ribs 41 of a stringed instrument included in violin group.
  • a violin 42 is fitted into the resilient piece 40 with the scroll 43 thereof being positioned upside.
  • the body 49 as a resonating mechanism is provided with a table 46 or so-called a belly having the bridge 45 mounted thereon, a rear table 47 spaced relative to the table 46 and a sound post 48 for propagating the vibration from the bridge 45 to the rear table 47.
  • the aforesaid resilient piece 40 is fixed to a movable table 51 which is slidable on the pedestal 1, while the casing 2 is able to be raised or lowered by revolving a volt 52. Accordingly, even with the use of other violins having slightly different configurations, the movable table 51 and the volt 52 can be adjusted so as to ensure the connecting of the bridge 45 with the distal end of the rod 21.
  • the first rod member 22 of this embodiment is formed to a 7mm diameter, while the second rod member 24 thereof a 5mm diameter.
  • the distance from the proximal end of the first rod member 22 to the point of contact between the interposing body 26 and the bridge 45 be set at 145 mm. This should apply to the case that the violin 42 is used as one of the stringed instruments included in violin group.
  • Reference numerals 53a, 53b designate R-channel and L-channel output terminals of a stereo-amplifier 53 or the source of speech respectively, while 54 a pair of switches for supplying a speech current from each of the output terminals 53a, 53b to either stereo-speakers 55,56 or the casing 2.
  • Reference numeral 57 designates a dummy resistance having the same value of resistance of 8 ohm as that of the stereo-speaker 55 or 56.
  • the casing 2 contains thereinside a main switch 61, a coil 62a of a relay 62 and a neon lamp 63 as a display, which are connected to both terminals of a power supply plug 64.
  • a point of contact 62b of the relay 62 for supplying a speech current from the output terminal 53a to the driving coil 11 is allowed to connect to between an external terminal 65 connected to the normally closed terminal 54a of said switch 54 and the driving coil 11.
  • the speech current from the R-channel of the stereo-amplifier 53 is supplied to the driving coil 11 inside the casing 2.
  • the speech current from the L-channel of the stereo-amplifier 53 may be supplied to the driving coil 11. Otherwise, the combined speech current from both the channels R and L may be supplied to the driving coil 11.
  • the ribs 41 of the violin 42 are supported by the resilient piece 40, then the movable table 51 and the volt 52 are suitably adjusted for proper positioning so that the distal end of the second rod member 24 may be located in the neighborhood of the bridge 45 of the violin 42.
  • the first fixing member 27 is attached to the distal end of the second rod member 24, thus sandwiching one side of the bridge 45 between the first fixing member 27 and the second fixing member 29.
  • the speech current from the stereo-amplifier 53 is supplied across the switch 54 to the stereo-speakers 55 and 56, thereby reproducing sounds therefrom. This is the same as the existing well-known stereophonic system.
  • the point of contact 62b of the relay 62 is switched so that the speech current from the R-channel of the stereo-amplifier 53 is supplied to the driving coil 11.
  • the driving coil 11 converts the speech current into the mechanical vibration, it is propagated from the rod 21 to the bridge 45 of the violin 42, thus vibrating the body 49 of the violin 42 so as to reproduce sounds therefrom.
  • This embodiment of the invention is featured by making use of the resonance mechanism of stringed instruments such as a violin, a viola, a cello, a contrabass and the like included in so-called violin group, instead of the vibration plate of the conventional speaker.
  • the strings 44 are generally allowed to vibrate by rubbing the same against a bow made of horse-hair (now shown) coated with pine resin, then the vibration thus generated is propagated from the bridge 45 to the table 46, which is further propagated across the sound post 48 to the rear table 47 having a slightly different lower natural frequency (or fundamental frequecy) than the table 46.
  • a musical sound unique to a stringed instrument such as the violin 42 is allowed to mainly come out of a pair of so-called f holes formed in the tale 46.
  • the bridge plays a very important role that the side-vibration from the strings 44 is oriented to the direction defined at the right angles thereto.
  • the inventor of the present invention has found out that if a mechanical vibration having a frequency equivalent to that developed by rubbing the strings 44 against a bow is given from external to the bridge 45, there can be reproduced a musical sound which is so close to a sound from the stringed instrument as actually played that one feels that the sound thus generated is beyond comparison with the conventional highest-grade speaker.
  • the mechanical vibration from the driving coil 11 can be propagated from the rod 21 to the bridge 45 which supports the strings 44 of the violin 42, whereby a musical sound can be reproduced with a highest-fidelity out of the body 49 of the violin 42 as if the viloin 42 were actually played.
  • the driving coil 11 is connected to the bridge 45 by the rod 21
  • the present invention is advantageous because of the following requirement.
  • a stringed instrument such as a violin is overhauled or newly facbricated, its resonating body 49 becomes or remains difficult to vibrate, so that any excellent sounds unique to the instrument cannot be obtained unless the instrument is continuously used for one or two months.
  • the speech current is intentionally applied to the driving coil 11, thus enabling the instrument to display the full ability to generate the sounds as originally expected in a short period.
  • a player apparatus of the invention is very advantageous in that it can be used as an aging apparatus of the violin 42 in addition to the aforesaid use as a player.
  • the sound developed by musical instruments such as the violin 42 generally has a specific range of its fundamental frequency and other frequencies which are each an integrity times as high as the fundamental frequency. Therefore, it is desirable that the frequency components of the speech current should be as close to those of the sounds developed by the violin 42 as possible.
  • the resonating body 49 of the violin 42 does generate real sounds. This is because that the frequency components of the recorded musical performance of the violin are approximately equal to those unique to the violin 42.
  • the player apparatus of the invention can make use of other instruments included in violin group such as a viola, a cello, a contrabass and the like, thrum-type stringed instruments such as a guitar and a mandolin and even a cembalo, so that sounds comparatively close to the original sounds can be reproduced respectively.
  • the present inventor found that Sonata with the violin and the piano can also be reproduced as vividly as the original performance.
  • the violin 42 is replaced with a cello in this embodiment, the sound of the piano alone can also be reproduced well due to the difference in frequency components between the cello and the violin.
  • the material of the rod 21 must be carefully chosen in order to propagate the mechanical vibration from the cap 12 of the drivig coil 11 with complete high-fidelity.
  • the resilience, damping (internal friction), density, propagation velocity and natural frequency of the rod 21 must be taken into consideration.
  • the table 46 made of a pine has the different fundamental frequency than that of the rear table 47 made of a maple, such that the adjustment of the table 46 at the musical scale ranging from C# to D and the rear table 47 from D to D# can assemble a violin which can generate excellent sounds.
  • the fundamental frequency of the table 46 should range from 139 to 148 Hz (or C#3 to D3 at the musical scale), while that of the rear table 47 from 148 to 156 (or D3 to D#3 at the musical scale).
  • the fundamental frequency of the rod 21 be out of the range from 139 to 156 Hz as defined by the above frequency ranges of the table 46 and rear table 47, even being inconsistent with either frequncies integrity times the above range.
  • the distance from the proximal end of the first rod member 22 to the contact point between the interposing body 26 and the bridge 45 is set at 145 mm, and that the rod 21 is made of aluminium alloy alone, whereby there could be reproduced out of the body 49 of the violin 42 the sounds with the highest-fidelity.
  • the damper 13 controlling the radial vibration of the voice coil 9
  • the front-to-back vibration of the voice coil 9 alone can be propagated to the side direction of the bridge 45, thereby reproducing the sounds as vividly as if the strings 44 were actually rubbed against a bow.
  • the driving coil 11 for use with the present embodiment can be obtained by removing the vibration plate from any exisiting speaker, without any needs of a particular structure. Accordingly, the fabrication of the appparatus will not be accompanied by any difficulty when it is actually designed. As the final quality of the sounds will also vary by replacing the violin 42 with another, the present apparatus can be effectively utilized for examining the quality of sounds which you can expect from the violin 42. Needless to say, you do not have to always use the built-in driving coil of the existing speaker for that of the invention.
  • This embodiment relates to an improved type of the aforesaid rod 21 of a first embodiment.
  • the rod-like member or the rod 21 of a second embodiment is so structured that an aluminium alloy rod 71 of 6mm diameter is connected to the center of the cap 12 of the driving coil 11, then to the distal end of the rod 71 is fittingly bonded a Pernambuco lumber 72, of which the distal end is then fixedly connected to the intreposing body 26 of a first embodiment by the screw 25. Further, the distance from the proximal end of the rod 71 to the contact point between the interposing body 26 and the bridge 45 is set at 145 mm.
  • Other structures of a second embodiment are totally the same as those of a first embodiement.
  • the Pernambuco lumber 72 as referred to in the above paragraph is a natural wood produced in Brazil, which is well-known to one skilled in the art as a preferred raw material for a supporting member of a bow against which the strings of the stringed instruments are rubbed. As a part of the rod 21 is constructed by a wood of the different nature to others, any undesirable resonant frequency of the natural frequency of the metallic rod 71 can be absorbed therein. Additionally, it is noted that the Pernambuco lumber 72 is said to be the most suited for generating the excellent sounds in drawing a bow against strings.
  • the Pernambuco lumber 72 constructing a part of the rod 21 for propagation of the mechanical vibration to the bridge 45, there can be reproduced from the body 49 of the violin 42 as beautiful and serene sounds as if the bow were drawn against the strings with the Pernaumbuco lumber 72 being atached to the bow.
  • the Pernambuco lumber 72 is usually used as a supporting member for a bow of not only the violin 42 but other stringed instruments included in violin group, ths same effect can be expected even in the case that other instruments than the violin 42 are used in the invention.
  • the undesirable resonant frequency unique to the rod 71 can be effectively absorbed and thus can reproduce with high fidelity as beautiful and serene sounds as if a bow with the Pernumbuco lumber 72 were drawn against strings.
  • the bottom plate 4 is allowed to extend outward relative to the annular magnet 6, while to front sides of the outer periphery of the bottom plate 4 are mounted double dampers 13 and 13A which are supported by an annular member 81.
  • an annular member 81 like a first emboidment, there may be provided a single damper 13.
  • the annular member 81 thus provided can make the aforesaid metallic frame 8 of a first embodiment unnecessary.
  • the annular magnet 6 of this embodiment uses an alnico-based magnet material which indicates a larger magnetic flux density and thus a more excellent magnetic property.
  • first rod member 22 constructing the rod 21 is made of hollow aluminium alloy
  • first and second embodiments to precisely prescribe either the aforesaid distance from the proximal end of the first rod member 22 to the contact point between the interposing member 26 and the bridge 45, or the configuration and material of the first rod member 22. That results from the facts that the annular magnet 6 constructing the driving coil 11 has an excellent magnetic property and the plural dampers 13 and 13A can more effectively suppress the radial vibration of the voice coil 9.
  • Other structures in this embodiment is totally the same as those of a first embodiment.
  • the present invention should not be limited to the foregoing embodiments, but may be variously modified within a technical scope of the invention.
  • the rod-like member or rod 21 may be suitably shaped otherwise, taking the properties of the various stringed instruments into consideration.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Stringed Musical Instruments (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
EP96116952A 1995-11-10 1996-10-22 Spielgerät Withdrawn EP0773530A3 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP292957/95 1995-11-10
JP29295795 1995-11-10
JP29295795A JP3321792B2 (ja) 1995-11-10 1995-11-10 プレーヤ装置

Publications (2)

Publication Number Publication Date
EP0773530A2 true EP0773530A2 (de) 1997-05-14
EP0773530A3 EP0773530A3 (de) 1999-10-20

Family

ID=17788624

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96116952A Withdrawn EP0773530A3 (de) 1995-11-10 1996-10-22 Spielgerät

Country Status (2)

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EP (1) EP0773530A3 (de)
JP (1) JP3321792B2 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2782830A1 (fr) * 1998-09-02 2000-03-03 Pica Sound International Instrument de musique electro-acoustique
FR2998086A1 (fr) * 2012-11-15 2014-05-16 Ecole Norm Superieure Lyon Ensemble et procede pour jouer automatiquement d'un instrument de musique a cordes frottees
CN109545169A (zh) * 2018-12-17 2019-03-29 王曦 一种弦乐演奏系统
GR20180100220A (el) * 2018-05-18 2020-01-22 Ρηγας Χρηστου Μακροπουλος Ηλεκτρομαγνητικο συστημα ηχοληψιας βιολιου
KR20200012353A (ko) * 2018-07-27 2020-02-05 김준구 직선왕복운동을 이용한 현악기 에이징 장치

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2619467C (en) * 2005-08-11 2014-07-08 Agapitus B. Lye Apparatus and method for vibrating stringed musical instruments
JP6503135B1 (ja) * 2018-12-19 2019-04-17 英男 大島 弦楽器励振装置および弦楽器励振システム

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5756279A (en) 1980-09-19 1982-04-03 Matsushita Graphic Commun Syst Inc Magnetic fluid recorder

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4567805A (en) * 1984-01-17 1986-02-04 Clevinger Martin R Compliant bridge transducer for rigid body string musical instruments
US4843937A (en) * 1985-12-19 1989-07-04 Murphy Robert T Electrical sound detector for stringed instrument
US5142961A (en) * 1989-11-07 1992-09-01 Fred Paroutaud Method and apparatus for stimulation of acoustic musical instruments
US5031501A (en) * 1990-03-19 1991-07-16 Ashworth William J Method for attaching an audio transducer to a string musical instrument
DE4415816A1 (de) * 1994-05-05 1995-11-09 Rudolf Mendler Verfahren und Vorrichtung zum Einspielen eines Streichinstruments

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5756279A (en) 1980-09-19 1982-04-03 Matsushita Graphic Commun Syst Inc Magnetic fluid recorder

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2782830A1 (fr) * 1998-09-02 2000-03-03 Pica Sound International Instrument de musique electro-acoustique
WO2000014720A1 (fr) * 1998-09-02 2000-03-16 Pica-Sound International Instrument de musique electro-acoustique
FR2998086A1 (fr) * 2012-11-15 2014-05-16 Ecole Norm Superieure Lyon Ensemble et procede pour jouer automatiquement d'un instrument de musique a cordes frottees
WO2014076144A1 (fr) * 2012-11-15 2014-05-22 Ecole Normale Supérieure De Lyon (Ensl) Ensemble et procede pour jouer automatiquement d'un instrument de musique a corde frottees
GR20180100220A (el) * 2018-05-18 2020-01-22 Ρηγας Χρηστου Μακροπουλος Ηλεκτρομαγνητικο συστημα ηχοληψιας βιολιου
GR1009745B (el) * 2018-05-18 2020-05-29 Ρηγας Χρηστου Μακροπουλος Ηλεκτρομαγνητικο συστημα ηχοληψιας βιολιου
KR20200012353A (ko) * 2018-07-27 2020-02-05 김준구 직선왕복운동을 이용한 현악기 에이징 장치
KR102116611B1 (ko) * 2018-07-27 2020-06-05 김준구 직선왕복운동을 이용한 현악기 에이징 장치
CN109545169A (zh) * 2018-12-17 2019-03-29 王曦 一种弦乐演奏系统
CN109545169B (zh) * 2018-12-17 2024-03-19 王曦 一种弦乐演奏系统

Also Published As

Publication number Publication date
EP0773530A3 (de) 1999-10-20
JP3321792B2 (ja) 2002-09-09
JPH09134168A (ja) 1997-05-20

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