FR3064804A1 - MECHANICAL SYSTEM FOR REMOVING THE "LARSEN" EFFECT ON ELECTROACOUSTIC GUITARS - Google Patents
MECHANICAL SYSTEM FOR REMOVING THE "LARSEN" EFFECT ON ELECTROACOUSTIC GUITARS Download PDFInfo
- Publication number
- FR3064804A1 FR3064804A1 FR1700636A FR1700636A FR3064804A1 FR 3064804 A1 FR3064804 A1 FR 3064804A1 FR 1700636 A FR1700636 A FR 1700636A FR 1700636 A FR1700636 A FR 1700636A FR 3064804 A1 FR3064804 A1 FR 3064804A1
- Authority
- FR
- France
- Prior art keywords
- spacer
- electroacoustic
- dams
- larsen
- sound
- 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- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
- G10H1/32—Constructional details
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10D—STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
- G10D1/00—General design of stringed musical instruments
- G10D1/04—Plucked or strummed string instruments, e.g. harps or lyres
- G10D1/05—Plucked or strummed string instruments, e.g. harps or lyres with fret boards or fingerboards
- G10D1/08—Guitars
- G10D1/085—Mechanical design of electric guitars
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10D—STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
- G10D3/00—Details of, or accessories for, stringed musical instruments, e.g. slide-bars
- G10D3/02—Resonating means, horns or diaphragms
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H3/00—Instruments in which the tones are generated by electromechanical means
- G10H3/12—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument
- G10H3/24—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument incorporating feedback means, e.g. acoustic
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Stringed Musical Instruments (AREA)
- Electrophonic Musical Instruments (AREA)
Abstract
Système mécanique permettant la suppression de l'effet « Larsen » sur les guitares électroacoustiques. Les guitares électroacoustiques sont très sensibles au retour de son venant de l'amplificateur car celui-ci est capté par la caisse qui le transmet à nouveau au microphone ce qui crée instantanément une boucle de son que l'on appelle « Larsen ». Pour éviter et supprimer totalement ce phénomène il suffit de relier la table et le dos par une entretoise située de préférence sous le chevalet. De manière à ce que cette entretoise soit encore plus efficace, on peut la relier à 2 barrages transversaux (table + dos et parallèles au chevalet de préférence) qui occupent la largeur de la caisse de préférence, ceci afin de rendre la table et le dos solidaires l'un de l'autre. Lorsque le son émis par la guitare sort de l'ampli et revient sur la caisse, les deux faces reçoivent celui-ci simultanément. Le son étant une succession de pression et dépression, lorsque l'air est en surpression les deux faces de la guitare auraient tendance à s'enfoncer mais cela leur est impossible car l'entretoise travaille alors en compression et empêche cela (aidée par les deux barrages). De même, lorsque l'air est en dépression les deux faces auraient tendance à s'écarter, mais cela leur est également impossible puisque l'entretoise travaille alors en traction et empêche cela (aidée par les 2 barrages). Ainsi, dans les deux cas l'effet Larsen ne peut se produire.Mechanical system allowing the suppression of the "Larsen" effect on electroacoustic guitars. Electroacoustic guitars are very sensitive to the return of sound coming from the amplifier because it is picked up by the body that transmits it back to the microphone which instantly creates a loop of sound that is called "Larsen". To avoid and completely eliminate this phenomenon simply connect the table and back by a spacer preferably located under the bridge. In order for this spacer to be even more effective, it can be connected to two transverse dams (table + backs and parallel to the easel preferably) which occupy the width of the box preferably, this in order to make the table and the back in solidarity with each other. When the sound emitted by the guitar comes out of the amp and returns to the body, both sides receive it simultaneously. The sound is a succession of pressure and depression, when the air is overpressure both sides of the guitar would tend to sink but it is impossible because the spacer works then in compression and prevents it (helped by both dams). Similarly, when the air is in depression the two faces would tend to deviate, but this is also impossible since the spacer then works in traction and prevents this (helped by the two dams). Thus, in both cases the Larsen effect can not occur.
Description
Titre de l’inventionTitle of the invention
Système mécanique permettant la suppression de l’effet « Larsen » sur les guitares électroacoustiquesMechanical system allowing the elimination of the "Larsen" effect on electroacoustic guitars
DescriptionDescription
Domaine technique : instruments de musique électroacoustiquesTechnical area: electroacoustic musical instruments
État de la technique antérieure : rien de similaireState of the prior art: nothing similar
Exposé de l’invention : Les guitares électroacoustiques sont très sensibles au retour de son venant de l'amplificateur car celui-ci est capté par la caisse qui le transmet à nouveau au microphone (quelqu’en soit le type mais généralement piézo) ce qui crée instantanément une boucle de son que l'on appelle « Larsen ».Disclosure of the invention: Electroacoustic guitars are very sensitive to the return of sound coming from the amplifier because it is picked up by the body which transmits it again to the microphone (whatever the type but generally piezo) which instantly creates a sound loop called "feedback".
Pour éviter et supprimer totalement ce phénomène il suffit de relier la table et le dos par une entretoise située de préférence sous le chevalet.To avoid and completely eliminate this phenomenon, simply connect the table and the back with a spacer preferably located under the easel.
De manière à ce que cette entretoise soit encore plus efficace on peut la relier (généralement par collage) à 2 barrages transversaux (table + dos et parallèles au chevalet de préférence) qui occupent la largeur de la caisse de préférence (ou bien relient deux autres barrages disposées de manière traditionnelle et quelles que soient leurs orientations) ceci afin de rendre la table et le dos solidaires l’un de l’autre.So that this spacer is even more effective, it can be connected (generally by gluing) to 2 transverse dams (table + back and preferably parallel to the easel) which occupy the width of the body preferably (or else connect two others dams arranged in a traditional way and whatever their orientation) this in order to make the table and the back integral with each other.
Lorsque le son émis par la guitare sort de l'ampli et revient sur la caisse, les deux faces reçoivent celui-ci simultanément. Le son étant une succession de pression et dépression, lorsque l'air est en surpression les deux faces de la guitare auraient tendance à s'enfoncer mais cela leur est impossible car l’entretoise travaille alors en compression et empêche cela (aidée par les deux barrages). De même, lorsque l'air est en dépression les deux faces auraient tendance à s'écarter, mais cela leur est également impossible puisque l’entretoise travaille alors en traction et empêche cela (aidée par les 2 barrages). Ainsi, dans les deux cas l’effet Larsen ne peut se produire.When the sound emitted by the guitar leaves the amplifier and returns to the body, the two sides receive it simultaneously. The sound being a succession of pressure and depression, when the air is in overpressure the two faces of the guitar would tend to sink but this is impossible for them because the spacer then works in compression and prevents this (helped by both dams). Similarly, when the air is in depression the two faces would tend to move apart, but this is also impossible for them since the spacer then works in traction and prevents this (helped by the 2 dams). Thus, in both cases the Larsen effect cannot occur.
Ce système peut également être utilisé sur tous les instruments de musique électroacoustiques comportant cet ensemble : microphone + caisse de résonance (ukulélé, mandoline, dobro, etc ...).This system can also be used on all electroacoustic musical instruments comprising this set: microphone + sound box (ukulele, mandolin, dobro, etc ...).
Il est utile de noter que ce principe (et uniquement pour l’entretoise) ne correspond en rien à ce que l'on rencontre sur les violons, contrebasses ou violoncelles et que l'on appelle « âme ». En effet, la fonction de cette pièce îo (âme) est de répartir l'effort de chevalet sur la table et le dos de l'instrument, ainsi que de propager le son que reçoit le chevalet sur le dos de l'instrument. Ces deux fonctions ne sont en aucun cas celles recherchées sur une guitare électroacoustique par ce système. En effet, d'une part les guitares électroacoustiques ne comportent pas cette pièce (âme), car elle possède des barrages pour renforcer la table et le dos. De plus, le micro se trouve uniquement sur la table et donc transmettre le son au dos ne présente aucun intérêt pour les guitares électroacoustiques.It is useful to note that this principle (and only for the spacer) does not correspond in any way to what is encountered on violins, double basses or cellos and which is called "soul". Indeed, the function of this piece îo (soul) is to distribute the bridge effort on the table and the back of the instrument, as well as to propagate the sound that the bridge receives on the back of the instrument. These two functions are in no way those sought on an electroacoustic guitar by this system. Indeed, on the one hand the electroacoustic guitars do not include this piece (soul), because it has dams to strengthen the table and the back. In addition, the microphone is only on the table and therefore transmitting sound on the back is of no interest for electroacoustic guitars.
Ce système peut donc également être utilisé sur les instruments tels que violons, contrebasses, violoncelles, etc ... (en utilisation électroacoustique) dans le cas où l’on utilise ce procédé soit par le collage de cette entretoise (traditionnellement l’âme ne l’est pas), soit par l’ajout de barrages. Traditionnellement ces instruments ne possèdent pas de barrage.This system can therefore also be used on instruments such as violins, double basses, cellos, etc ... (in electroacoustic use) in the case where this process is used, either by gluing this spacer (traditionally the soul does not is not), either by adding dams. Traditionally these instruments do not have a barrier.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB2018/052247 WO2018178956A1 (en) | 2017-03-31 | 2018-04-01 | Mechanical system for eliminating the "larsen" effect on acoustic-electric guitars |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1700364 | 2017-03-31 | ||
FR1700364A FR3064803A1 (en) | 2017-03-31 | 2017-03-31 | MECHANICAL SYSTEM FOR REMOVING THE "LARSEN" EFFECT ON ELECTROACOUSTIC GUITARS |
Publications (1)
Publication Number | Publication Date |
---|---|
FR3064804A1 true FR3064804A1 (en) | 2018-10-05 |
Family
ID=60627666
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR1700364A Pending FR3064803A1 (en) | 2017-03-31 | 2017-03-31 | MECHANICAL SYSTEM FOR REMOVING THE "LARSEN" EFFECT ON ELECTROACOUSTIC GUITARS |
FR1700636A Withdrawn FR3064804A1 (en) | 2017-03-31 | 2017-06-14 | MECHANICAL SYSTEM FOR REMOVING THE "LARSEN" EFFECT ON ELECTROACOUSTIC GUITARS |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR1700364A Pending FR3064803A1 (en) | 2017-03-31 | 2017-03-31 | MECHANICAL SYSTEM FOR REMOVING THE "LARSEN" EFFECT ON ELECTROACOUSTIC GUITARS |
Country Status (2)
Country | Link |
---|---|
FR (2) | FR3064803A1 (en) |
WO (1) | WO2018178956A1 (en) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2046331A (en) * | 1934-01-27 | 1936-07-07 | Acousti Lectric Company | Stringed musical instrument |
GB510489A (en) * | 1938-09-19 | 1939-08-02 | Robert Bullough | An improved soundpost for violins and the like musical instruments |
US3974730A (en) * | 1975-08-08 | 1976-08-17 | Adams Jr Andrew Borden | Guitar strut assembly |
RU2061260C1 (en) * | 1992-12-18 | 1996-05-27 | Сергей Сергеевич Артамонов | String holder for guitar |
EP0840280A2 (en) * | 1996-11-05 | 1998-05-06 | Karlwalter Schmidt | String instrument |
JPH11143456A (en) * | 1997-11-14 | 1999-05-28 | Kenji Sugita | Guitar |
DE202004007402U1 (en) * | 2004-05-08 | 2004-07-22 | Gross, Horst | Musical string instrument has solid base in two halves coupled by the string throat section |
US20050188814A1 (en) * | 2004-02-12 | 2005-09-01 | David Bell | Dual saddle bridge |
WO2009106892A2 (en) * | 2008-02-28 | 2009-09-03 | Michael Gillett | A stringed musical instrument |
-
2017
- 2017-03-31 FR FR1700364A patent/FR3064803A1/en active Pending
- 2017-06-14 FR FR1700636A patent/FR3064804A1/en not_active Withdrawn
-
2018
- 2018-04-01 WO PCT/IB2018/052247 patent/WO2018178956A1/en active Application Filing
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2046331A (en) * | 1934-01-27 | 1936-07-07 | Acousti Lectric Company | Stringed musical instrument |
GB510489A (en) * | 1938-09-19 | 1939-08-02 | Robert Bullough | An improved soundpost for violins and the like musical instruments |
US3974730A (en) * | 1975-08-08 | 1976-08-17 | Adams Jr Andrew Borden | Guitar strut assembly |
RU2061260C1 (en) * | 1992-12-18 | 1996-05-27 | Сергей Сергеевич Артамонов | String holder for guitar |
EP0840280A2 (en) * | 1996-11-05 | 1998-05-06 | Karlwalter Schmidt | String instrument |
JPH11143456A (en) * | 1997-11-14 | 1999-05-28 | Kenji Sugita | Guitar |
US20050188814A1 (en) * | 2004-02-12 | 2005-09-01 | David Bell | Dual saddle bridge |
DE202004007402U1 (en) * | 2004-05-08 | 2004-07-22 | Gross, Horst | Musical string instrument has solid base in two halves coupled by the string throat section |
WO2009106892A2 (en) * | 2008-02-28 | 2009-09-03 | Michael Gillett | A stringed musical instrument |
Also Published As
Publication number | Publication date |
---|---|
FR3064803A1 (en) | 2018-10-05 |
WO2018178956A1 (en) | 2018-10-04 |
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PLFP | Fee payment |
Year of fee payment: 2 |
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PLSC | Publication of the preliminary search report |
Effective date: 20181005 |
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ST | Notification of lapse |
Effective date: 20200206 |