WO2023115995A1 - Tweeter pneumatique à double membrane et double tonalité - Google Patents

Tweeter pneumatique à double membrane et double tonalité Download PDF

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Publication number
WO2023115995A1
WO2023115995A1 PCT/CN2022/112529 CN2022112529W WO2023115995A1 WO 2023115995 A1 WO2023115995 A1 WO 2023115995A1 CN 2022112529 W CN2022112529 W CN 2022112529W WO 2023115995 A1 WO2023115995 A1 WO 2023115995A1
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WO
WIPO (PCT)
Prior art keywords
panel
double
sound
membrane
tone
Prior art date
Application number
PCT/CN2022/112529
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English (en)
Chinese (zh)
Inventor
陈坚强
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国英电子(惠州)有限公司
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Publication of WO2023115995A1 publication Critical patent/WO2023115995A1/fr

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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
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • 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
    • 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

Definitions

  • the invention relates to the technical field of loudspeakers, in particular to a double-tone double-membrane pneumatic tweeter.
  • the speaker is actually a conversion device that converts electrical energy into sound.
  • the coil When different electronic energies are transmitted to the coil, the coil generates an energy that interacts with the magnetic field of the magnet. This interaction causes the paper plate to vibrate, because the electronic energy changes at any time.
  • the coil of the horn will move forward or backward, so the paper plate of the horn will move accordingly. This action changes the density of the air and produces sound.
  • the operating frequency range of the current pneumatic tweeter is relatively small, and the nonlinear harmonic distortion of the sound film is relatively serious. It is difficult to solve the problem of mechanical damping with a single diaphragm, which also leads to problems in the industry.
  • the present invention provides a dual-tone and double-membrane pneumatic tweeter for the purpose of widening the operating frequency range of the pneumatic tweeter, effectively improving the nonlinear harmonic distortion of the sound film, solving the problem that a single diaphragm is difficult to solve the mechanical damping problem, and solving industry problems. trumpet.
  • a two-tone double-membrane pneumatic tweeter comprising:
  • the main structure includes a panel one, a panel two, a magnetic ring, a sound film one and a sound film two, the first panel and the second panel are provided with sound holes, and the magnetic ring is fixedly installed on the Between the panel two and the panel one, the sound film one is packaged between the panel one and the magnetic ring, and the sound film two is packaged between the panel two and the magnetic ring, so An airtight space is formed between the second sound membrane and the first sound membrane, and air is contained in the airtight space.
  • the main structure further includes a damping plate, the damping plate is fixedly installed inside the magnetic ring, and the damping plate is made of wool felt.
  • the second sound membrane and the first sound membrane are symmetrically distributed on both sides of the damping plate.
  • both the second sound membrane and the first sound membrane have positive and negative connection lines, and both the positive and negative connection lines extend to the outside of the main structure.
  • both the inner side of the first panel and the inner side of the second panel are provided with threading grooves for passing the positive and negative connecting wires.
  • both the first panel and the second panel are made of plastic, and both the first panel and the second panel are circular.
  • the central positions of the panel 1 and the panel 2 are both formed with horn-shaped depressions towards the magnetic ring.
  • the sound holes are all distributed in the horn-shaped depressions, and the sound holes in each of the horn-shaped depressions are arranged in a circular and equiangular manner.
  • the magnetic ring is made of magnetic steel.
  • the structure of the first panel is completely the same as that of the second panel, and the structure of the first sound membrane is exactly the same as that of the second sound membrane.
  • the sound membrane 1 and the sound membrane 2 are integrated through the airbag-type closed space, which enhances the structural strength of the sound membrane, reduces the split vibration of the sound membrane and reduces harmonic distortion, and this airbag-type closed space structure improves the structural strength of the sound membrane , it will not increase the resonance frequency of the sound film, and even reduce the resonance frequency of the sound film, broadening the operating frequency range of the pneumatic tweeter;
  • the sound membrane 1 and the sound membrane 2 of this kind of airbag-type closed space structure are set back to back and symmetrically, which can offset the nonlinear distortion produced by the asymmetric shape of the two sound membranes in the push-pull work, so as to improve the harmonic effect of distortion;
  • a mechanical damping material that is, a damping plate
  • the damping effect of the pneumatic diaphragm can be adjusted by selecting the damping plate made of wool felt and the number, thereby further Improve the nonlinear harmonic distortion of the diaphragm when it is working.
  • the damping plate installed between the first and second diaphragms solves the problem that a single diaphragm is difficult to solve the mechanical damping problem. It can be said that it has solved the problem of the industry.
  • Fig. 1 is the structural representation of the two-tone double-membrane pneumatic tweeter provided by the embodiment of the present invention
  • Fig. 2 is a schematic diagram of the explosive structure of the dual-tone and double-membrane pneumatic tweeter provided by the embodiment of the present invention
  • Fig. 3 is a schematic diagram of the front view structure of the dual-tone and double-membrane pneumatic tweeter provided by the embodiment of the present invention.
  • Fig. 4 is a schematic cross-sectional structural view cut along A-A in Fig. 3;
  • FIG. 5 is a schematic structural view of panel 1 of the dual-tone and double-membrane pneumatic tweeter provided by the embodiment of the present invention.
  • Fig. 6 is a frequency change diagram of the single-tone membrane working mode of the dual-tone double-membrane pneumatic tweeter provided by the embodiment of the present invention.
  • Fig. 7 is a frequency change diagram of the dual-tone membrane positive push-pull working mode of the dual-tone double-membrane pneumatic tweeter provided by the embodiment of the present invention.
  • Fig. 8 is a frequency change diagram of the double-tone membrane anti-push-pull working mode of the dual-tone double-membrane pneumatic tweeter provided by the embodiment of the present invention.
  • Fig. 9 is a comparative diagram of the improvement of harmonic distortion of the dual-tone and double-membrane pneumatic tweeter provided by the embodiment of the present invention.
  • connection indicates the connection relationship between parts
  • connection or integration; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two parts or the interaction relationship between two parts.
  • the double-tone double-membrane pneumatic tweeter provided by the embodiment of the present invention, as shown in Figures 1-5, includes: a main structure, the main structure includes a panel 1, a panel 2, a magnetic ring 3, a sound film 5 and a sound film Two 6, the panel one 1 and the panel two 2 are provided with sound holes 7, the magnetic ring 3 is fixedly installed between the panel two 2 and the panel one 1, the sound film one 5 is encapsulated between the panel one 1 and the magnetic ring 3, The sound film two 6 is encapsulated between the panel two 2 and the magnetic ring 3, and a closed space is formed between the sound film two 6 and the sound film one 5, and there is air in the closed space.
  • the main structure also includes a damping plate 4, the damping plate 4 is fixedly installed inside the magnetic ring 3, and the damping plate 4 is made of wool felt, and the damping plate 4
  • the thickness can be determined according to the actual process standard.
  • the two-tone double-membrane pneumatic tweeter adopting the above technical scheme is mainly composed of panel one 1, panel two 2, magnetic ring 3, sound film one 5 and sound film two 6, so that the structure of the two-tone double-membrane pneumatic tweeter is simple, especially Suitable for mass production.
  • a closed space (airbag space) is formed between the magnetic ring 3, the sound film 1 5 and the sound film 2 6, and there is air (air as the medium) in the closed space, so that the sound film 1 5 and the sound film 2 6 can form a whole through the interaction of air.
  • the sound membrane 1 5 and the sound membrane 2 6 can push and pull each other, damp each other, and compensate each other through the air in the confined space;
  • the closed space structure formed between the magnetic ring 3, the first sound film 5 and the second sound film 6 plays an important role in improving the nonlinear harmonic distortion of the aerodynamic treble.
  • the present invention improves the nonlinear harmonic distortion in the following four aspects:
  • the sound film 1 5 and the sound film 2 6 are integrated through the airbag-type closed space, which enhances the structural strength of the sound film, reduces the split vibration of the sound film and reduces harmonic distortion, and this air-bag closed space structure improves the sound of the sound film.
  • the structural strength will not increase the resonance frequency of the sound film, and even reduce the resonance frequency of the sound film, which broadens the operating frequency range of the pneumatic tweeter;
  • the sound membrane 1 5 and the sound membrane 2 6 of this airbag closed space structure are set back to back and symmetrically, which can offset the nonlinear distortion produced by the asymmetric shape of the two sound membranes during push-pull work, thereby achieving improvement
  • a mechanical damping material that is, a damping plate 4
  • the damping of the pneumatic diaphragm can be adjusted by selecting the damping plate 4 and the number made of wool felt effect, thereby further improving the nonlinear harmonic distortion of the diaphragm during work.
  • the damping plate 4 installed between the first 5 and the second 6 pieces of the sound membrane solves the problem that a single diaphragm is difficult to solve the mechanical damping problem. It can be said that it solves the problem of the industry.
  • the specific material of the damping plate 4 can be adjusted according to the use of the speaker and the requirements of the application scene.
  • the material (damping coefficient) and the thickness (quantity, density) of the damping plate can be adjusted. In practical applications, it can be adjusted flexibly.
  • the damping plate 4 is made of wool felt because the damping plate 4 made of wool felt has a better damping effect in adjusting the pneumatic diaphragm.
  • Single-sound film working mode Only one set of diaphragms (one of sound film 1 5 and sound film 2 6) is connected to the circuit to work. When a single diaphragm works, one group of diaphragms is in an active working state. The air coupling in the airbag-type closed space structure drives another set of diaphragms to work passively. This mode forms a "double resonance peak state". The operating frequency range of the sound diaphragm is relatively wide. One set of diaphragms actively radiates sound, and the other set of diaphragms The sheet passively radiates sound, forming an inverted figure-of-eight directivity of front and rear radiation. The characteristic is that the sound pressure of the front radiation is about 6db higher than that of the rear radiation.
  • Dual-sound membrane positive push-pull working mode on the circuit, two groups of diaphragms (sound membrane 1 5 and sound membrane 2 6) work in reverse phase at the same time (series connection and parallel connection are the same). The membranes are set back to back and the circuit is connected in reverse phase. The dual-sound membranes are in the push-pull vibration state in the same direction, both of which are actively working and drive each other to push-pull. This mode forms a "single resonance peak state", but the resonance frequency is lower and the resonance peak is higher. , the output sound pressure is higher. At this time, the sound membrane has the widest operating frequency range, and the output sound pressure is about 3db higher than that of the single membrane mode. Due to the radiation before and after the active work of the double membrane, it also presents an inverted figure-of-eight directivity. The characteristic is that the front and rear radiation sound pressure is the same, but the sound phase is opposite.
  • Dual-sound film anti-push-pull working mode On the circuit, two sets of diaphragms (sound film 1 5 and sound film 2 6) work in phase at the same time (series connection and parallel connection are also the same).
  • the dual-sound membranes are working, because the dual-sound membranes are set back to back and the circuit is connected in phase, the dual-sound membranes are in the opposite push-pull vibration state, and they are all actively working, driving each other in reverse push-pull.
  • This mode also forms a "single resonance peak State", but the resonant frequency is relatively high, and the frequency response curve shifts to the high frequency direction.
  • the working frequency range of the sound film is narrow, and the output sound pressure is the same as that of the double sound film positive push-pull working mode. Due to the radiation before and after the active work of the double membrane, it also presents an inverted figure-of-eight directivity. The characteristic is that the front and rear radiation sound pressure is the same, the frequency response working range is narrow, but the sound phase is the same.
  • the second sound membrane 6 and the second sound membrane 5 are symmetrically distributed on both sides of the damping plate 4. side.
  • the set sound film two 6 and the sound film one 5 all have positive and negative connection lines, and the positive and negative The pole connecting wires all extend to the outside of the main structure, which is convenient for wiring through the positive and negative pole connecting wires.
  • the inner side of the set panel one 1 and the inner side of the panel two 2 are provided with holes for passing through the positive and negative electrodes. Threading slot 8 for connecting wire.
  • the set panel one 1 and panel two 2 are Made of plastic, and the first panel 1 and the second panel 2 are circular.
  • the central positions of the set panel one 1 and panel two 2 all form a horn-shaped depression towards the magnetic ring 3 , the sound holes 7 are all distributed in the horn-shaped depressions, and the sound holes 7 in each horn-shaped depression are arranged in a circular and equiangular manner.
  • the magnetic ring 3 provided is made of magnetic steel.
  • the structures of the set panel one 1 and panel two 2 are completely The same, and the first panel 1 and the second panel 2 are symmetrically arranged, the structure of the first sound film 5 and the second sound film 6 are exactly the same, and the first sound film 5 and the second sound film 6 are arranged symmetrically.
  • the performance test results of the dual-tone and double-membrane pneumatic tweeter provided in this embodiment are as follows:
  • Fig. 6 is a frequency change diagram of the single-tone membrane working mode of the dual-tone double-membrane pneumatic tweeter provided by the embodiment of the present invention.
  • Fig. 7 is a frequency change diagram of the dual-tone membrane positive push-pull working mode of the dual-tone double-membrane pneumatic tweeter provided by the embodiment of the present invention.
  • Fig. 8 is a frequency change diagram of the double-tone membrane anti-push-pull working mode of the dual-tone double-membrane pneumatic tweeter provided by the embodiment of the present invention.
  • Fig. 9 is a comparative diagram of the improvement of harmonic distortion of the dual-tone and double-membrane pneumatic tweeter provided by the embodiment of the present invention.
  • the sound film 1 5 and the sound film 2 6 are integrated through the airbag-type closed space, which enhances the structural strength of the sound film, reduces the split vibration of the sound film and reduces harmonic distortion, and this air-bag closed space structure improves the sound of the sound film.
  • the structural strength will not increase the resonance frequency of the sound film, and even reduce the resonance frequency of the sound film, which broadens the operating frequency range of the pneumatic tweeter;
  • the sound membrane 1 5 and the sound membrane 2 6 of this airbag closed space structure are set back to back and symmetrically, which can offset the nonlinear distortion produced by the asymmetric shape of the two sound membranes during push-pull work, thereby achieving improvement
  • a mechanical damping material that is, a damping plate 4
  • the damping of the pneumatic diaphragm can be adjusted by selecting the damping plate 4 and the number made of wool felt effect, so as to further improve the nonlinear harmonic distortion of the diaphragm when it is working.
  • the damping plate 4 set between the 6 pieces of the sound film 1 and the sound film 2 solves the problem that a single diaphragm is difficult to solve the mechanical damping. It can be said that cracking problems of the industry.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

La présente invention se rapporte au domaine technique des haut-parleurs, et concerne un tweeter pneumatique à double membrane et double tonalité. Le tweeter comprend une structure de corps principal, la structure de corps principal comprenant un premier panneau, un second panneau, un anneau magnétique, une première membrane et une seconde membrane, le premier panneau et le second panneau étant tous deux pourvus de trous sonores , l'anneau magnétique étant monté de manière fixe entre le second panneau et le premier panneau, la première membrane étant encapsulée entre le premier panneau et l'anneau magnétique, la seconde membrane étant encapsulée entre le second panneau et l'anneau magnétique, un espace fermé étant formé entre la seconde membrane et la première membrane, et de l'air est présent dans l'espace fermé ; et la structure de corps principal comprend en outre une plaque d'amortissement, qui est montée à demeure à l'intérieur de l'anneau magnétique et constituée de feutre de laine. Selon le tweeter pneumatique à double membrane et double tonalité de la présente invention, la plage de fréquences de fonctionnement d'un tweeter pneumatique est élargie, et la distorsion harmonique non linéaire d'une membrane est efficacement atténuée ; et la plaque d'amortissement étant disposée entre la première membrane et la seconde membrane, le problème selon lequel l'amortissement mécanique est difficile à surmonter par une seule membrane est résolu, ce qui permet de surmonter les difficultés dans l'industrie.
PCT/CN2022/112529 2021-12-21 2022-08-15 Tweeter pneumatique à double membrane et double tonalité WO2023115995A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202111571585.9 2021-12-21
CN202111571585.9A CN114125665A (zh) 2021-12-21 2021-12-21 双音双膜气动高音喇叭

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WO2023115995A1 true WO2023115995A1 (fr) 2023-06-29

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114125665A (zh) * 2021-12-21 2022-03-01 国英电子(惠州)有限公司 双音双膜气动高音喇叭

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170272866A1 (en) * 2016-03-18 2017-09-21 Dolby International Ab Force Balanced Micro Transducer Array
CN108882123A (zh) * 2018-06-25 2018-11-23 歌尔股份有限公司 发声器件和便携终端
CN109040920A (zh) * 2018-07-26 2018-12-18 维沃移动通信有限公司 一种发声结构及终端
CN111464926A (zh) * 2020-04-09 2020-07-28 东莞市猎声电子科技有限公司 一种双膜片振动喇叭系统
CN214851805U (zh) * 2021-03-19 2021-11-23 益阳市信维声学科技有限公司 一种双面发声的微型扬声器
CN114125665A (zh) * 2021-12-21 2022-03-01 国英电子(惠州)有限公司 双音双膜气动高音喇叭

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170272866A1 (en) * 2016-03-18 2017-09-21 Dolby International Ab Force Balanced Micro Transducer Array
CN108882123A (zh) * 2018-06-25 2018-11-23 歌尔股份有限公司 发声器件和便携终端
CN109040920A (zh) * 2018-07-26 2018-12-18 维沃移动通信有限公司 一种发声结构及终端
CN111464926A (zh) * 2020-04-09 2020-07-28 东莞市猎声电子科技有限公司 一种双膜片振动喇叭系统
CN214851805U (zh) * 2021-03-19 2021-11-23 益阳市信维声学科技有限公司 一种双面发声的微型扬声器
CN114125665A (zh) * 2021-12-21 2022-03-01 国英电子(惠州)有限公司 双音双膜气动高音喇叭

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