CN111683311B - Loudspeaker device - Google Patents
Loudspeaker device Download PDFInfo
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- CN111683311B CN111683311B CN202010300654.1A CN202010300654A CN111683311B CN 111683311 B CN111683311 B CN 111683311B CN 202010300654 A CN202010300654 A CN 202010300654A CN 111683311 B CN111683311 B CN 111683311B
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- zeolite
- speaker
- noble metal
- loudspeaker
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
- H04R1/028—Casings; Cabinets ; Supports therefor; Mountings therein associated with devices performing functions other than acoustics, e.g. electric candles
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/02—Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Chemical & Material Sciences (AREA)
- Multimedia (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention provides a speaker device, comprising a speaker; a speaker container for accommodating a speaker; a zeolite material in a region exposed to sound generated by a speaker, the zeolite material comprising zeolite particles containing a noble metal. The noble metal in the zeolite material can catalyze and decompose the organic gas volatilized by the loudspeaker device, thereby preventing the zeolite material from aging.
Description
Technical Field
The invention relates to the field of loudspeakers, in particular to a loudspeaker device.
Background
EP2003924a1 relates to a loudspeaker system comprising a sound chamber for a loudspeaker, the sound chamber being filled with a porous material which acts as a gas absorbing material for physically absorbing gas in the sound chamber behind the loudspeaker system. The porous material may be activated carbon, zeolite, silica, alumina, zirconia, magnesia, black iron oxide, molecular sieves, fullerene and carbon nanotubes.
201180040808.7 relates to a loudspeaker system, a sound chamber for housing a loudspeaker and a zeolite. The patent discloses zeolite particles of a zeolite material having a silica to alumina ratio of at least 200, solving the problem of aging of zeolites as air absorbing materials, particularly aging due to irreversible absorption by higher vapor pressure substances.
Zeolite particles having a silicon to aluminium ratio of at least 200 do not fully solve the ageing problem in practical loudspeaker system operation. In the experiment, the pure silicon zeolite with the silicon-aluminum ratio more than 1000 also has the aging phenomenon. It is mainly the organic volatile gases produced during operation of the loudspeaker system that cause irreversible aging of the absorber. Part of the organic gas is organic volatile gas generated by the loudspeaker unit when the loudspeaker system works, and part of the organic gas is organic gas volatilized by the plastic sound cavity shell when the loudspeaker system works.
Disclosure of Invention
The invention aims to provide a loudspeaker device.
In order to solve the above technical problems, the present invention provides a speaker device, comprising,
a speaker;
a speaker container for accommodating a speaker;
a zeolite material, which is exposed to the sound generated by the speaker,
the zeolite material includes zeolite particles containing a noble metal.
Preferably, at least a portion of said zeolite particles are beta molecular sieves containing said noble metal.
Preferably, at least a part of the zeolite particles is of MFI structure, and the mass of the beta molecular sieve accounts for 1-10% of the total mass.
Preferably, the molar mass of the noble metal accounts for 0.1-5% of the beta molecular sieve.
Preferably, the noble metal is one or more of gold, silver and a platinum group metal.
Preferably, the MFI structure zeolite is S-1 pure silicalite.
Preferably, the speaker container is made of plastic.
The present application also provides for the use of a zeolite material comprising zeolite particles containing a noble metal, said zeolite material being exposed to a region of sound generated by a loudspeaker.
Preferably, the zeolite material comprises a noble metal-containing beta molecular sieve and MFI structure zeolite particles.
In the present application, the zeolite particles are porous minerals, typically alumino-silicate minerals, or pure silicon minerals.
The noble metal-containing beta molecular sieve of the present application can be obtained by the following steps: and adding a solution containing a noble metal element into the suspension of the beta molecular sieve, fully mixing, drying, and calcining at a high temperature of 300-700 ℃ to obtain the beta molecular sieve containing the noble metal. The zeolite material of the present application is obtained by mixing a noble metal-containing beta molecular sieve with MFI structure zeolite particles. The organic gas decomposed by the speaker device of the present application includes: benzene, ketone, amine, alcohol, ether, ester, acid and petroleum hydrocarbon.
The loudspeaker device of the invention has the following beneficial effects,
1. noble metals in the zeolite material can catalyze and decompose organic gas volatilized by the loudspeaker device, so that the zeolite material is prevented from aging;
2. the beta molecular sieve containing the noble metal is used for catalytically decomposing organic gas, the beta molecular sieve has a larger pore diameter of 0.7nm, the organic gas is easy to adsorb, and the beta molecular sieve containing the noble metal has high catalytic activity and can decompose the organic gas in an aerobic environment and convert the organic gas into carbon dioxide and water molecules;
the pore size of the zeolite particles of the MFI structure is well matched with the molecular size of air, and in the prior art, it is generally used as a sound-absorbing material, but the zeolite particles of the MFI structure are aged due to organic gas released from a speaker device, and even if zeolite particles having a silica-alumina ratio of at least 200 are used, the aging problem cannot be completely solved. In the experiment, the pure silicon zeolite with the silicon-aluminum ratio more than 1000 also has the aging phenomenon. In the present application, a zeolite material obtained by mixing zeolite particles of an MFI structure and a noble metal-containing β -molecular sieve is used as a sound absorbing material, and the noble metal-containing β -molecular sieve decomposes an organic gas, so that the problem of aging of the zeolite particles of the MFI structure can be completely solved.
Drawings
Fig. 1 is a schematic view of a structure of a speaker device made of an aluminum container.
Fig. 2 is a schematic diagram of an impedance curve testing system of a speaker device of an aluminum container.
Fig. 3 is a schematic diagram of a signal generator of a speaker device of an aluminum container.
Fig. 4 is a graph comparing the peak impedance curve with the gas absorbing material loaded and the impedance curve without the gas absorbing material loaded.
Fig. 5 is a graph showing a comparison between unmodified zeolite and modified zeolite as a gas absorbing material in an energization aging test of a speaker device having an aluminum container.
Fig. 6 is a schematic structural view of a speaker device of a plastic container.
Fig. 7 is a graph showing a comparison between a non-modified zeolite and a modified zeolite as a gas absorbing material in an energization aging test of a speaker device of a plastic container.
Wherein: 1. a speaker; 2. an aluminum container; 2', a plastic container; 3. a zeolite material.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
The invention provides a speaker device, comprising a speaker; a speaker container for accommodating a speaker; a zeolite material in a region exposed to sound generated by a speaker, the zeolite material comprising zeolite particles containing a noble metal.
In a preferred embodiment, at least a portion of said zeolite particles are beta molecular sieves containing said noble metal. At least one part of the zeolite particles is of an MFI structure, and the mass of the beta molecular sieve accounts for 1-10% of the total mass. The molar mass of the noble metal accounts for 0.1-5% of that of the beta molecular sieve. The noble metal is one or more of gold, silver and platinum group metals. The MFI structure zeolite can be S-1 pure silicalite. The loudspeaker container is made of plastic.
The present application also provides for the use of a zeolite material comprising zeolite particles containing a noble metal, said zeolite material being exposed to a region of sound generated by a loudspeaker. The zeolite material comprises a beta molecular sieve containing noble metal and MFI structure zeolite particles.
In the present application, the zeolite particles are porous minerals, typically alumino-silicate minerals, or pure silicon minerals.
The noble metal-containing beta molecular sieve of the present application can be obtained by the following steps: and adding a solution containing a noble metal element into the suspension of the beta molecular sieve, fully mixing, drying, and calcining at a high temperature of 300-700 ℃ to obtain the beta molecular sieve containing the noble metal. The zeolite material of the present application is obtained by mixing a noble metal-containing beta molecular sieve with MFI structure zeolite particles. The organic gas decomposed by the speaker device of the present application includes: and volatile compounds such as benzenes, ketones, amines, alcohols, ethers, esters, acids, and petroleum hydrocarbons.
In a speaker system, the impedance curve is one of the important characteristics reflecting the performance of the speaker, and F0 corresponding to the impedance peak is generally regarded as the low-frequency resonance point F0 of the speaker system. In a loudspeaker system with a gas absorbing material added, the lower the frequency corresponding to the impedance peak, the better the absorption by the absorber. After the absorber is aged, the absorption effect is deteriorated, and the frequency corresponding to the impedance peak becomes high, that is, F0 becomes high.
The inventors made the following comparative experiments in developing the speaker device of the present application:
experiment one
As shown in fig. 1, a speaker case is made of aluminum, and a speaker 1 is housed in a speaker case 2 made of aluminum. Speaker unit size: 12mm × 17mm × 3mm, back sound cavity volume 0.5ml, zeolite material 3 100 mg. The zeolite material is composed of MFI structure zeolite particles.
As shown in fig. 2, the impedance curve test system of the speaker device is an aluminum sound chamber. As shown in fig. 4, a graph comparing the peak impedance curve with the gas absorbing material loaded and the impedance curve without the gas absorbing material loaded is shown. As can be derived from fig. 4, in the speaker system with the added gas absorbing material, the frequency corresponding to the impedance peak is low.
Experiment two
As shown in fig. 3, the power-on aging test of the speaker device having the aluminum sound chamber was performed. The experimental environmental conditions are as follows: 27 ℃ and 70% humidity; energization voltage: 4.5V; inputting a signal: 800HZ sinusoidal signal. Power on time 168 Hrs. The electrical impedance curves and F0 were tested every 24 hours.
In the experiment, the non-modified zeolite is composed of MFI structure zeolite particles, the mass ratio of silicon to aluminum of the MFI structure zeolite particles is 300, and the non-modified zeolite does not include a beta molecular sieve containing noble metals. The modified zeolite comprises MFI structure zeolite particles and a beta molecular sieve containing metal platinum, wherein the mass of the beta molecular sieve containing the metal platinum accounts for 10% of the total mass, and the molar mass of the noble metal accounts for 5% of the beta molecular sieve.
The T-F0 curve for the loudspeaker device of the aluminium loudspeaker enclosure is shown in figure 5. The aging speed of the unmodified zeolite is high in the range of 0-48Hrs, and after 48Hrs, the aging speed is reduced and the zeolite tends to be stable.
The experiment shows that as the loudspeaker can generate volatile gas after being heated, and the aluminum container cannot generate volatile gas in the using process, in 0-48Hrs, the loudspeaker is aged gradually after no modified zeolite absorbs the volatile gas, after 48Hrs, the gas generated by the loudspeaker is volatilized completely, and the volatile gas cannot exist in the sound cavity, so that the gas absorbing material stops aging.
As shown in fig. 5, in the modified zeolite 0 to 24Hrs, the concentration of the volatile gas generated by the speaker itself was high, and the metal platinum in the modified zeolite could not be decomposed in time, whereas after 24Hrs, the concentration of the volatile gas generated by the speaker decreased, and the metal platinum in the modified zeolite could be decomposed in time, so that the modified zeolite would not be aged even if there was a small amount of volatile gas, and after 48Hrs, the gas generated by the speaker itself was completely volatilized, and no volatile gas was generated in the sound cavity. In this experiment, the modified zeolite was allowed to stop aging after 24, 24 Hrs. In this experiment, the F0 for the modified zeolite was small compared to the F0 for the unmodified zeolite at the same time period, indicating that the modified zeolite aged slower than the unmodified zeolite due to the inclusion of the metal platinum.
Experiment three
As shown in fig. 6, the speaker apparatus in this experiment used a speaker container 2' made of a plastic material. In practice, the loudspeaker enclosure is also usually made of plastic. In this experiment, the speaker 1 was housed in a sound chamber of aluminum material, and the zeolite material 3 was housed in a rear sound chamber. Speaker unit size: 12mm × 17mm × 3mm, a back sound cavity volume of 0.5ml, and 100mg of gas absorbing material.
In the experiment, the non-modified zeolite is composed of MFI structure zeolite particles, the mass ratio of silicon to aluminum of the MFI structure zeolite particles is 300, and the non-modified zeolite does not include a beta molecular sieve containing noble metals. The modified zeolite comprises MFI structure zeolite particles and a beta molecular sieve containing metal platinum, wherein the mass of the beta molecular sieve containing the metal platinum accounts for 10% of the total mass, and the molar mass of the noble metal accounts for 5% of the beta molecular sieve.
As shown in fig. 7, it can be seen that the aging of the unmodified zeolite is continuously affected by the volatile organic gas generated from the plastic case, as compared with the aging test of the speaker device with the aluminum sound chamber shown in fig. 5.
In fig. 7, it can be seen from the curves corresponding to the unmodified zeolite that in the range of 0 to 48Hrs, the speaker and the plastic container both generate volatile gas, so the aging speed of the unmodified zeolite is high, and after 48Hrs, the speaker itself does not generate volatile gas any more. Therefore, the aging speed of the non-modified zeolite is slow, but the plastic shell can continuously release volatile gas, the aging of the non-modified zeolite is not stopped and is continuously continued, the phenomenon is discovered in the long-term experiment process of the inventor, in the prior art, the influence of the volatile gas of the plastic on the aging speed of the sound absorbing material is generally ignored, and even the MFI structure zeolite particles with high silicon-aluminum quality can not stop aging.
In fig. 7, the modified zeolite contains a beta molecular sieve containing platinum as a catalyst to promote the decomposition of volatile gas, and aging of the modified zeolite is stopped after 24 Hrs. The experimental result shows that even if the plastic shell continuously emits volatile gas, the platinum-containing Beta zeolite in the modified zeolite can promote the volatile gas to be decomposed in time, so that the aging of the modified zeolite is not influenced.
The zeolite material can be granular, and the granular zeolite material specifically comprises granules of a plurality of zeolite particles bonded together by a binder, wherein the particle size of the granules is 0.1-0.5. The mass of the adhesive accounts for 1-20% of the total mass of the zeolite material.
The zeolite material of this application also can make block structure, is equipped with a plurality of tunnels on block structure's the vertical, and it has sound absorbing material to fill between the tunnel. The center distance between the adjacent pore channels is 0.05mm-5 mm. The zeolite particles are bonded together by a binder. The block structure also comprises fibers which are arranged in a criss-cross mode, and the mass ratio of the fibers in the sound absorption material is not more than 50%. The zeolite material and the inner wall of the loudspeaker container are supported by sound-absorbing cotton. The sound-absorbing cotton is formed by foaming melamine. The sound-absorbing cotton is interwoven by fiber yarns, and intercommunicating pore canals are formed between the interwoven fiber yarns. The binder is one of aluminum sol, silica sol, polyacrylate, polyurethane, epoxy resin, chloroprene rubber, silicon rubber and polyvinyl acetate. The mass proportion range of the binder in the sound-absorbing material is 1-20%.
In the application, the beta molecular sieve containing the noble metal is used for catalytically decomposing organic gas, the beta molecular sieve has a larger aperture of 0.7nm, the organic gas is easy to adsorb, and the beta molecular sieve containing the noble metal has high catalytic activity, can decompose the organic gas in an aerobic environment and convert the organic gas into carbon dioxide and water molecules; the pore size of the zeolite particles of the MFI structure is well matched with the size of air molecules, and in the prior art, it is generally used as a sound absorbing material, but the zeolite particles of the MFI structure are aged due to organic gas released from a speaker device, and even if zeolite particles having a silica-alumina ratio of at least 200 are used, the aging problem cannot be completely solved. In the experiment, the pure silicon zeolite with the silicon-aluminum ratio more than 1000 also has the aging phenomenon. In the present application, a zeolite material obtained by mixing zeolite particles of an MFI structure and a noble metal-containing β -molecular sieve is used as a sound absorbing material, and the noble metal-containing β -molecular sieve decomposes an organic gas, so that the problem of aging of the zeolite particles of the MFI structure can be completely solved.
The above-mentioned embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (6)
1. A speaker apparatus, comprising a speaker unit having a speaker,
a speaker;
a speaker container for accommodating a speaker;
a zeolite material exposed to a region of sound generated by a loudspeaker, characterized in that,
the zeolite material comprises zeolite particles containing a noble metal;
at least a portion of the zeolite particles are beta molecular sieves containing the noble metal, and at least a portion of the zeolite particles are MFI structures;
the MFI structure zeolite is S-1 pure silicon zeolite.
2. The speaker device as claimed in claim 1, wherein the zeolite particles have a mass of the beta molecular sieve of 1% to 10% of the total mass.
3. The loudspeaker device of claim 1 wherein the noble metal comprises from 0.1% to 5% by molar mass of the beta molecular sieve.
4. The loudspeaker assembly of claim 1 wherein the noble metal is one or more of gold, silver and a platinum group metal.
5. The speaker assembly of claim 1 wherein said speaker enclosure is made of plastic.
6. Use of a zeolite material comprising zeolite particles containing a noble metal, characterized in that the zeolite material is exposed to a region of sound generated by a loudspeaker;
the zeolite material comprises zeolite particles containing a noble metal;
at least a portion of the zeolite particles are beta molecular sieves containing the noble metal, and at least a portion of the zeolite particles are MFI structures;
the MFI structure zeolite is S-1 pure silicon zeolite.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011094019.9A CN112261518A (en) | 2020-04-16 | 2020-04-16 | Sound-absorbing particle |
| CN202010300654.1A CN111683311B (en) | 2020-04-16 | 2020-04-16 | Loudspeaker device |
| CN202011094033.9A CN112261519A (en) | 2020-04-16 | 2020-04-16 | Sound-absorbing material block |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010300654.1A CN111683311B (en) | 2020-04-16 | 2020-04-16 | Loudspeaker device |
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| CN202011094033.9A Division CN112261519A (en) | 2020-04-16 | 2020-04-16 | Sound-absorbing material block |
| CN202011094019.9A Division CN112261518A (en) | 2020-04-16 | 2020-04-16 | Sound-absorbing particle |
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| CN111683311A CN111683311A (en) | 2020-09-18 |
| CN111683311B true CN111683311B (en) | 2022-05-17 |
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| CN202011094019.9A Pending CN112261518A (en) | 2020-04-16 | 2020-04-16 | Sound-absorbing particle |
| CN202011094033.9A Pending CN112261519A (en) | 2020-04-16 | 2020-04-16 | Sound-absorbing material block |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103098490A (en) * | 2010-08-23 | 2013-05-08 | 楼氏电子亚洲有限公司 | Loudspeaker system with improved sound |
| CN106540741A (en) * | 2016-10-19 | 2017-03-29 | 浙江大学 | It is used at room temperature eliminating catalyst of formaldehyde and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02250499A (en) * | 1989-03-24 | 1990-10-08 | Kyushu Hitachi Maxell Ltd | Earphone |
| DE102005061713B4 (en) * | 2005-12-22 | 2015-05-21 | Süd-Chemie Ip Gmbh & Co. Kg | Volatile hydrocarbon adsorber unit, method of making a zeolitic adsorbent material and zeolitic adsorbent material obtainable by the method |
| US8687836B2 (en) * | 2012-08-31 | 2014-04-01 | Bose Corporation | Loudspeaker system |
| CN106162468A (en) * | 2016-08-31 | 2016-11-23 | 歌尔股份有限公司 | Speaker module |
| CN107500604B (en) * | 2017-09-21 | 2020-05-19 | 苏州夸克新材料科技有限公司 | Improved sound-absorbing material |
| CN108696807A (en) * | 2018-07-28 | 2018-10-23 | 瑞声科技（南京）有限公司 | The loudspeaker enclosure of sound-absorbing material and the application sound-absorbing material |
| CN108996515A (en) * | 2018-07-28 | 2018-12-14 | 瑞声科技（南京）有限公司 | A kind of sound-absorbing material and the loudspeaker enclosure using the sound-absorbing material |
| CN110180582A (en) * | 2019-05-23 | 2019-08-30 | 中国科学院上海硅酸盐研究所 | A kind of diesel vehicle oxidation catalyst and preparation method thereof |
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- 2020-04-16 CN CN202011094019.9A patent/CN112261518A/en active Pending
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103098490A (en) * | 2010-08-23 | 2013-05-08 | 楼氏电子亚洲有限公司 | Loudspeaker system with improved sound |
| CN106540741A (en) * | 2016-10-19 | 2017-03-29 | 浙江大学 | It is used at room temperature eliminating catalyst of formaldehyde and preparation method thereof |
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| CN112261519A (en) | 2021-01-22 |
| CN112261518A (en) | 2021-01-22 |
| CN111683311A (en) | 2020-09-18 |
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