CN1255278A - Vibration transducers for resonant panel-form loudspeaker and loudspeaker with the same - Google Patents

Vibration transducers for resonant panel-form loudspeaker and loudspeaker with the same Download PDF

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Publication number
CN1255278A
CN1255278A CN98804811A CN98804811A CN1255278A CN 1255278 A CN1255278 A CN 1255278A CN 98804811 A CN98804811 A CN 98804811A CN 98804811 A CN98804811 A CN 98804811A CN 1255278 A CN1255278 A CN 1255278A
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CN
China
Prior art keywords
vibration exciter
exciter
voice coil
plate
resonant panel
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.)
Pending
Application number
CN98804811A
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Chinese (zh)
Inventor
丹尼尔·莫尔克罗夫特
尼尔·哈里斯
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NVF Tech Ltd
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New Transducers Ltd
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Publication date
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Application filed by New Transducers Ltd filed Critical New Transducers Ltd
Publication of CN1255278A publication Critical patent/CN1255278A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H04R9/066—Loudspeakers using the principle of inertia
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2440/00—Bending wave transducers covered by H04R, not provided for in its groups
    • H04R2440/05—Aspects relating to the positioning and way or means of mounting of exciters to resonant bending wave panels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/045—Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

A vibration exciter or transducer (4) for imparting bending wave energy to a resonant panel (2), wherein the exciter (4) is adapted to be coupled to the panel at a plurality of discrete positions (6) forming a triangular array.

Description

The transducer of resonant mode panel-loudspeakers and with the loud speaker of this transducer
The present invention is about a kind of loud speaker.Concrete but nonabsoluteness is sayed it, the present invention applies crooked wave energy and produces the electric vibrating exciter that audio frequency is exported such resonant mode panel-loudspeakers to resonant panel about a kind of.This kind loud speaker is illustrated in applicant's International Application No. WO 97/09842.
The vibration exciter of excitation resonance loudspeaker panel needs a kind of lip-deep structure of plate that is installed in, and makes actuator power convert bending wave most possibly to.The habitual response exciter puts on plate by opposing exciter mass inertia and will pushing away/drafting ability.Only motor is fixedly connected on plate.Mounting structure in the plate coideal with honeycomb core and rete is that single little position contacts, and contact size is greater than plate core body honeycomb size, and structural strength is greater than the bond strength of core body-rete.
A kind of structural system of verifying is directly installed on tubulose voice coil loudspeaker voice coil assembly on the plate film, forms firm circle with plate and contacts.Yet, when sample size during near the size of circular contact zone, big contact zone reaction significantly under high frequency that voice coil loudspeaker voice coil is synthetic down, the power input of confinement plate.
Purpose of the present invention addresses the above problem.
According to the present invention, provide a kind of and execute crooked wave energy and produce the vibration exciter of audio frequency output to resonant panel, exciter is connected in plate at a plurality of discrete positions place that constitutes the triangular array contact disc.Each discrete link position is spaced apart around a circle, and for convenience, this circle is corresponding to the end shape of conventional tube voice coil loudspeaker voice coil molded part.
Discrete link position can be by making the end of voice coil loudspeaker voice coil molded part recess or fort castellation, or produce by the top installation elements that can connect voice coil loudspeaker voice coil.As a result, contact site reduces, and originally Bi He circumferential contact portion opens wide and allow that the dispersal type bending wave passes through in the plate under the exciter district.The obvious result of this structure is that exciter " is discovered " the resistance mechanical load that extends to higher-frequency.
Mechanicalness is the most stable is configured as into equidistant three fort castellations, and this point confirms through mathematical model test.The contact disc shape is changed to linear from circle segments can further increase input plate.For the purpose of facility, can adopt circular contact disc.
Above explanation is the principle that example discloses discontinuous contact with the movable coil vibration exciter.Yet principle of uniformity can be applicable between driving element and plate to interrupt or any type of vibration exciter of discontinuous form physical connection.
Additional contact site between exciter and plate can be by being positioned at the configuration placed in the middle of fundamental triangle array extending element for example cross-member provide.
The present invention schematically is shown in accompanying drawing by way of example.
Fig. 1 has shown installation or bonding pad between vibration exciter and resonant panel for the part schematic diagram of existing resonant panel;
Fig. 2 is the part schematic diagram similar to Fig. 1, has shown according to the first embodiment of the present invention;
Fig. 3 be connected in resonant panel and with the side view cutaway drawing of the corresponding vibration exciter of Fig. 2;
Fig. 4 is the part schematic diagram similar to Fig. 1, has shown according to a second embodiment of the present invention;
Fig. 5 is the part schematic diagram similar to Fig. 1, has shown a third embodiment in accordance with the invention;
Fig. 6 is connected in resonant panel and corresponding to the side view cutaway drawing of the vibration exciter of Fig. 5.
Fig. 1 has shown the acoustic apparatus 1 of the sort of type described in the International Patent Application WO 97/09842, comprises the audio frequency element 2 of resonant panel shape, and crooked wave energy is added thereon by a vibration exciter (not shown), so that plate 2 resonance and produce audio frequency output.Illustrated as WO97/09842, vibration exciter can comprise having the movable coil electro-motor that is directly connected in the voice coil loudspeaker voice coil on plate 2 one sides.Circle or encircle 3 voice coil loudspeaker voice coil contact zone or " fixation points of representing on 2 of the plates ", or the tubulose molded part of top winding around.The applicant finds that this mounting structure arrives the plate face in order to make the crooked wave energy of effective emission, and makes voice coil loudspeaker voice coil inertia keep minimum.This structure has caused being called the seondary effect of " effect of holes " (" aperature effect "), at this moment, and the ring that the peak frequency response of plate and exciter become with plate 2 indirect capitiforms or enclose 3 diameter associated.The present invention has confirmed another potential at least effect, and promptly the ring of plate or the parts of enclosing in 3 can show secondary resonance, are called " cap " (" cap ") resonance.
The present invention is intended to reduce at least the generation effect of holes and/or cap resonance.
Consult Fig. 2 to 6, especially Fig. 2 and 3 the invention provides the mounting structure (see Fig. 3 and 6) of vibration exciter 4 on resonant panel 2, so that the interruption situation of mounting structure among Fig. 1 is not interrupted or is less than in the resonance behavior of plate 2.
Fig. 2 shows exciter contact zone or the fixation point circular array 5 that is discrete contact disc 6 onboard.The primary condition of stability is that three contact discs constitute triangle, but in the present embodiment, is eight contact discs of having gained in strength.As can be seen from Figure 3, exciter 4 is the inertial device of Figure 11 b shown type in the International Patent Application WO 97/09842, have and comprise voice coil loudspeaker voice coil 11 and the magnet body assembly 12 that is wrapped in the coil on the cylindrical shape molded part, 13,14, an axial end portion drive-type of voice coil loudspeaker voice coil 11 is installed on plate 2, to send crooked wave energy to plate, magnet body assembly 12,13,14 surround voice coil loudspeaker voice coils 11 and comprise the magnet 12 that is folded in the pole piece that is engaged in the voice coil loudspeaker voice coil 11 and 14 of a hat second pole pieces that surrounds voice coil loudspeaker voice coil, are used for dustproof elasticity in magnet body assembly and the voice coil loudspeaker voice coil simultaneously and hang and hang part 15 and be connected.
The axial end portion 16 of voice coil loudspeaker voice coil 11 supports onboard that in annular installation elements 9 element 9 can be a molded item.The axial end portion 16 of voice coil loudspeaker voice coil can be connected in installation elements 9 with binding agent, or another kind of mode, and installation elements 9 can directly be molded on the voice coil loudspeaker voice coil.The installation elements side 17 of exciter 4 dorsad is equipped with from the side 17 a series of short fort battlements or the projectioies 10 of extending and form an annular array, and the end face 18 of each fort battlements 10 has formed the array that defines exciter 4 discrete contact disc 6 of fixation point on plate 2 jointly.Exciter can be fixed in plate with the binding agent of the end face 18 that is added on installed part 9.
The embodiment of Fig. 4 is roughly similar to the embodiment of Fig. 2 and 3, but the number of discrete contact disc 6 increases among the array 5a, and being connected and the additional contact site 19 that is provided with placed in the middle between the also promising improvement exciter in zone that circular array 5a defined and plate.The shape of contact site 19 is elected cross as, because its discontinuity does not radially promptly constitute closed figures, thereby do not have the adverse effect of the continuous circular shape fixation point of Fig. 1 to the bending wave behavior of plate.
The alternate embodiment of the present invention of the embodiment fairly similar of Fig. 5 and 6 demonstrations and Fig. 2 and 3 is the variant of the embodiment of Fig. 4.In this example, contact array 5a revises part and is, the additional contact site 19 of the cross of Fig. 4 is replaced by the cross array 20 of discrete contact disc 21, with further minimizing since the exciter mount pad to any interference of bending wave behavior.
Therefore, separate the driving contact for improving the method that exciter engages with the plate room machine.Can be adjusted with the characteristic that cooperates selected plate by the high frequency characteristics that is designed to the tuning plates radiation.Therefore, can select simple fort battlements to be enough to exciter is fixed at area at least three points on plate surface installs.The not isomorphism type of contact geometry shape provides the scope at interactive this interface of a plurality of factors of contact area, viscose glue combination, plate loss, the effect of holes and cap resonance under some situation of further accurate adjustment.
Though be not shown among the figure, will understand, can be not voice coil loudspeaker voice coil be installed on the plate, and directly voice coil loudspeaker voice coil be installed on the plate, but still have advantage of the present invention by fort castellation installation elements 9.At this moment, the end of voice coil loudspeaker voice coil molded part must be made fort castellation or revise in his mode of planting and discrete mounting points ring is provided.Fort battlements end can be folded, and with when being fixed in plate with binding agent, forms the flange that increases contact area and conduct reinforcement auxiliary member.
The invention provides a kind of simple structure that reduces hole and/or cap effect when vibration exciter is fixed in resonant panel.Though the present invention is illustrated particularly with reference to the movable coil exciter, should understand that this structure also can be applied to the exciter of other (non-voice coil loudspeaker voice coil) pattern and have same effect.

Claims (11)

1. a vibration exciter applies crooked wave energy to a resonant panel, it is characterized in that, described exciter can be connected on the described plate on a plurality of discrete positions that form triangular array.
2. according to the vibration exciter of claim 1, it is characterized in that described array comprises the discrete positions more than three that is positioned on the circumference.
3. according to the vibration exciter of claim 1 or 2, it is characterized in that, also be included at least one additional link position that is provided with placed in the middle in the triangular array.
4. according to the vibration exciter of claim 3, it is characterized in that described additional link position is a cross.
5. according to the vibration exciter of claim 4, it is characterized in that described cross comprises discrete link position array.
6. according to the vibration exciter of aforementioned each claim, it is characterized in that, also comprise installation elements, be equipped with the projection that defines each discrete link position on it.
7. according to the vibration exciter of claim 6, it is characterized in that described installation elements is an annular.
8. according to the vibration exciter of claim 6 or 7, it is characterized in that, also comprise a movable coil electro-motor; Described installation elements is connected in voice coil loudspeaker voice coil.
9. according to the vibration exciter of aforementioned each claim, it is characterized in that described exciter is an inertial device.
10. a loud speaker is characterized in that, comprises the vibration exciter according to aforementioned each claim.
11. the loud speaker according to claim 10 is characterized in that, comprises the audio frequency element of resonant panel form.
CN98804811A 1997-05-10 1998-05-06 Vibration transducers for resonant panel-form loudspeaker and loudspeaker with the same Pending CN1255278A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9709438.7A GB9709438D0 (en) 1997-05-10 1997-05-10 Loudspeaker transducer
GB9709438.7 1997-05-10

Publications (1)

Publication Number Publication Date
CN1255278A true CN1255278A (en) 2000-05-31

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CN98804811A Pending CN1255278A (en) 1997-05-10 1998-05-06 Vibration transducers for resonant panel-form loudspeaker and loudspeaker with the same

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EP (1) EP0988775B1 (en)
JP (1) JP2002505813A (en)
KR (1) KR20010012364A (en)
CN (1) CN1255278A (en)
AR (1) AR012678A1 (en)
AT (1) ATE205993T1 (en)
AU (1) AU734941B2 (en)
BR (1) BR9809609A (en)
CA (1) CA2290103A1 (en)
CO (1) CO4780082A1 (en)
DE (1) DE69801755T2 (en)
DK (1) DK0988775T3 (en)
ES (1) ES2164423T3 (en)
GB (1) GB9709438D0 (en)
HK (1) HK1024134A1 (en)
ID (1) ID20950A (en)
IL (1) IL132587A0 (en)
PT (1) PT988775E (en)
TW (1) TW381404B (en)
WO (1) WO1998052383A1 (en)
ZA (1) ZA983836B (en)

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CN1565146B (en) * 2001-10-04 2010-05-12 Nxp股份有限公司 Electroacoustic transducer having a moving coil and having movable holding elements for the connecting leads of the moving coil

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US10820883B2 (en) 2014-04-16 2020-11-03 Bongiovi Acoustics Llc Noise reduction assembly for auscultation of a body
US9615813B2 (en) 2014-04-16 2017-04-11 Bongiovi Acoustics Llc. Device for wide-band auscultation
US10639000B2 (en) 2014-04-16 2020-05-05 Bongiovi Acoustics Llc Device for wide-band auscultation
US9564146B2 (en) 2014-08-01 2017-02-07 Bongiovi Acoustics Llc System and method for digital signal processing in deep diving environment
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Publication number Publication date
EP0988775B1 (en) 2001-09-19
PT988775E (en) 2002-03-28
KR20010012364A (en) 2001-02-15
BR9809609A (en) 2000-07-04
ZA983836B (en) 1999-01-25
ID20950A (en) 1999-04-01
DE69801755D1 (en) 2001-10-25
ATE205993T1 (en) 2001-10-15
CA2290103A1 (en) 1998-11-19
ES2164423T3 (en) 2002-02-16
CO4780082A1 (en) 1999-05-26
IL132587A0 (en) 2001-03-19
DE69801755T2 (en) 2002-05-29
AR012678A1 (en) 2000-11-08
AU7343698A (en) 1998-12-08
JP2002505813A (en) 2002-02-19
EP0988775A1 (en) 2000-03-29
AU734941B2 (en) 2001-06-28
HK1024134A1 (en) 2000-09-29
DK0988775T3 (en) 2002-01-07
GB9709438D0 (en) 1997-07-02
WO1998052383A1 (en) 1998-11-19
TW381404B (en) 2000-02-01

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