EP2369579A1 - Dispositif amortisseur de sons d'un piano à queue - Google Patents

Dispositif amortisseur de sons d'un piano à queue Download PDF

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Publication number
EP2369579A1
EP2369579A1 EP10158056A EP10158056A EP2369579A1 EP 2369579 A1 EP2369579 A1 EP 2369579A1 EP 10158056 A EP10158056 A EP 10158056A EP 10158056 A EP10158056 A EP 10158056A EP 2369579 A1 EP2369579 A1 EP 2369579A1
Authority
EP
European Patent Office
Prior art keywords
sound
muter
grand piano
damping
accordance
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Withdrawn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
EP10158056A
Other languages
German (de)
English (en)
Inventor
Feikje Oud
Kornelis Jakob Kluiving
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP10158056A priority Critical patent/EP2369579A1/fr
Publication of EP2369579A1 publication Critical patent/EP2369579A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
    • G10C3/00—Details or accessories
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
    • G10C1/00—General design of pianos, harpsichords, spinets or similar stringed musical instruments with one or more keyboards
    • G10C1/04—General design of pianos, harpsichords, spinets or similar stringed musical instruments with one or more keyboards of grand pianos
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
    • G10C3/00—Details or accessories
    • G10C3/06—Resonating means, e.g. soundboards or resonant strings; Fastenings thereof
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
    • G10C3/00—Details or accessories
    • G10C3/16—Actions
    • G10C3/166—Actions for damping the strings
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
    • G10C3/00—Details or accessories
    • G10C3/16—Actions
    • G10C3/20—Actions involving the use of hydraulic, pneumatic or electromagnetic means
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
    • G10C9/00—Methods, tools or materials specially adapted for the manufacture or maintenance of musical instruments covered by this subclass

Definitions

  • the invention relates to a device for damping the sound of a grand piano, comprising a muter.
  • the goal of the invention is a device which is able to attenuate the transmission of sound more effectively and/or which is able to attenuate the transmission of sound to a desired degree which can be set by a user.
  • the device comprises a frame arranged to be placed on a floor under a grand piano, wherein said muter is arranged above said frame, connecting means which connect said muter with said frame, said connecting means being extendable such that said muter can be moved to a desired height under the beams on the lower side of the sound board and/or such that said muter can be moved against said beams with a certain force.
  • Tests have proven that the amount of damping can be regulated to a desired level by moving the muter farther or closer to the beams under the soundboard, and that a maximum amount of damping is obtained by not only moving the muter against said beams, but also by pushing with a certain force such that no vibrating air can escape the room above and between the beams.
  • Said muter is preferably dimensioned so as to be able to close the area between the lower sides of the beams and the sound board.
  • Said muter has preferably substantially the same shape as a sound board of a grand piano.
  • the upper side of said muter is substantially flat.
  • Said muter preferably comprises a layer of rigid material with a layer of resilient material on top of it, preferably a layer of acoustic insulation material.
  • said layer of acoustic insulation material comprises a lower layer of insulating felt like material, and an upper layer of acoustically structured absorbing open cell foam.
  • Said connecting means are preferably connected to a motor for extending said connecting means.
  • Said motor is preferably arranged to be automatically switched off when a predetermined power threshold is reached.
  • Said motor comprises preferably input means to set said power threshold.
  • said connecting means comprise a vertical externally threaded shaft or a rack, which is attached to said muter, and slidingly mounted in a vertical tube in said frame.
  • Said shaft or rack is preferably driven by said motor through a worm and worm gear.
  • said connecting means further preferably comprise at least one vertical stationary shaft, which is coupled to said muter at a distance from and parallel to said threaded shaft and which is slidingly mounted in said frame.
  • Said frame preferably comprises wheels for moving the frame on a floor.
  • the device for damping the sound of a grand piano 1 comprises a metal frame 2, which arranged to be placed on a floor under the grand piano 1, a muter 3 and connecting means 4, said connecting means 4 connecting the muter 3 with the frame 2.
  • the frame 2 is further provided with an electrical motor 5 for extending and retracting the connecting means 4 in vertical direction, such that the muter 3 can be moved upward and downward.
  • the frame 2 comprises a substantially square lower main frame 21 extending in a horizontal plane, and connected to a substantially identical upper main frame 22 extending parallel thereto.
  • the motor 5 is mounted between said main frames 21, 22.
  • Each corner of the lower main frame is provided with legs 23, which have castors 24 at their lower ends, so that the frame can be rolled on the floor.
  • the castors are further connected to a subsidiary inner frame 25, which extends under said main frame 21, and which provides extra strength for preventing the legs 23 with the castors 24 to bend outwardly if a downward force is exerted on the frame.
  • a vertical tube 41 is mounted in the frame 1, and attached to the lower main frame 21 and upper main frame 22.
  • an externally threaded shaft 42 is slidingly mounted in the tube 41 in the tube 41.
  • the shaft 42 is 290 mm long and is driven in vertical direction by the motor 5, by means of a worm and worm gear (not shown), such that if the motor axis rotates at 1500 rpm the shaft moves at 15 mm/s.
  • the frame 2 is further provided with one or two vertical stationary shafts 43, at a distance from and parallel to the threaded shaft 42 and which are slidingly mounted their own vertical tubes (not shown) in the frame 2.
  • the motor 5 comprises a power cord and a power adapter (not shown) for connecting the motor to the mains.
  • the power of the motor 5 is chosen such that the maximum upward force of the shaft is about 500 N (or 50 kg).
  • the motor 5 is arranged to automatically be switched off when this maximum force is reached.
  • the motor 5 comprises input and control means to limit said maximum force to another, lower, value, for instance by means of a microcontroller controlling the maximum torque of the motor.
  • the motor can be manually switched on and off and the direction of movement of the shaft 42 can be chosen, by means of a tumbler switch, whereby a user can move the muter to any desired height between the lowest position wherein the muter extends on or near the upper main frame 22, and the highest position wherein the muter 3 pushes against the lower sides of the beams under the sound board of the grand piano 1 with maximum force.
  • the muter 3 comprises a plate shaped 1.2 cm thick wooden board 31, and a layer 32 of 6.5 cm thick resilient material on top of said board.
  • the board 31 and the layer 32 of resilient material may be enclosed in a thin fabric cover.
  • the layer 32 of resilient acoustic insulation and absorption material comprises an insulating lower layer of 3.5 cm of felt like material and a sound absorbing structured upper layer of 3 cm of open cell foam.
  • the muter 3 is tailor made for each type of grand piano in order to narrowly fit against and entirely close the lower opening of the grand piano 1 under the sound board while resting against the beams.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electromagnetism (AREA)
  • Auxiliary Devices For Music (AREA)
EP10158056A 2010-03-26 2010-03-26 Dispositif amortisseur de sons d'un piano à queue Withdrawn EP2369579A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10158056A EP2369579A1 (fr) 2010-03-26 2010-03-26 Dispositif amortisseur de sons d'un piano à queue

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10158056A EP2369579A1 (fr) 2010-03-26 2010-03-26 Dispositif amortisseur de sons d'un piano à queue

Publications (1)

Publication Number Publication Date
EP2369579A1 true EP2369579A1 (fr) 2011-09-28

Family

ID=42101403

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10158056A Withdrawn EP2369579A1 (fr) 2010-03-26 2010-03-26 Dispositif amortisseur de sons d'un piano à queue

Country Status (1)

Country Link
EP (1) EP2369579A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013160618A1 (fr) * 2012-04-27 2013-10-31 Vallas Boris Piano
USD839954S1 (en) * 2016-10-11 2019-02-05 Yamaha Corporation Piano

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US50042A (en) * 1865-09-19 George a
WO1993017299A1 (fr) * 1992-02-28 1993-09-02 Daniell Revenaugh Piano a queue a fond ouvrant
US6030045A (en) * 1998-07-13 2000-02-29 Hoshino Gakki Co., Ltd. Holding structure for a post for a drum chair
DE19955085A1 (de) * 1999-11-15 2001-05-17 Maul Jakob Gmbh Stützsäule
DE20110276U1 (de) * 2001-06-21 2001-09-20 Mengler Walter Stuhl, insbesondere Klavierstuhl
US20030226439A1 (en) * 2002-06-10 2003-12-11 Daniell Revenaugh Piano muter
US20060238008A1 (en) * 2005-04-08 2006-10-26 Baranov Michael V Chair for spinal deceases prevention and treatment

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US50042A (en) * 1865-09-19 George a
WO1993017299A1 (fr) * 1992-02-28 1993-09-02 Daniell Revenaugh Piano a queue a fond ouvrant
US6030045A (en) * 1998-07-13 2000-02-29 Hoshino Gakki Co., Ltd. Holding structure for a post for a drum chair
DE19955085A1 (de) * 1999-11-15 2001-05-17 Maul Jakob Gmbh Stützsäule
DE20110276U1 (de) * 2001-06-21 2001-09-20 Mengler Walter Stuhl, insbesondere Klavierstuhl
US20030226439A1 (en) * 2002-06-10 2003-12-11 Daniell Revenaugh Piano muter
US6720489B2 (en) 2002-06-10 2004-04-13 Daniell Revenaugh Piano muter
US20060238008A1 (en) * 2005-04-08 2006-10-26 Baranov Michael V Chair for spinal deceases prevention and treatment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013160618A1 (fr) * 2012-04-27 2013-10-31 Vallas Boris Piano
FR2990045A1 (fr) * 2012-04-27 2013-11-01 Boris Vallas Piano
USD839954S1 (en) * 2016-10-11 2019-02-05 Yamaha Corporation Piano

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