CN215420668U - Noise reduction earphone for nuclear magnetic resonance - Google Patents
Noise reduction earphone for nuclear magnetic resonance Download PDFInfo
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- CN215420668U CN215420668U CN202120989438.2U CN202120989438U CN215420668U CN 215420668 U CN215420668 U CN 215420668U CN 202120989438 U CN202120989438 U CN 202120989438U CN 215420668 U CN215420668 U CN 215420668U
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- magnetic resonance
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- nuclear magnetic
- patient
- earplug
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- 238000005481 NMR spectroscopy Methods 0.000 title claims abstract description 35
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- 238000009413 insulation Methods 0.000 claims abstract description 22
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- 239000000835 fiber Substances 0.000 claims abstract description 14
- 230000030279 gene silencing Effects 0.000 claims abstract description 10
- 238000010521 absorption reaction Methods 0.000 claims description 13
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Abstract
The utility model relates to the field of medical instruments, in particular to a silencing earphone for nuclear magnetic resonance, which comprises a pair of earmuffs; the earmuffs are internally provided with a multilayer sound insulation structure, sound insulation fiber filling layers and vacuum cavities are used for absorbing noise under the alternate action, the separated spring damping structure is arranged for reducing vibration noise, the ear plugs are also arranged at the ears, and after multiple noise reduction and sound insulation treatments, the noise in nuclear magnetic resonance can be reduced to the acceptable degree of a patient, so that the psychological pressure of the patient during nuclear magnetic resonance examination is greatly reduced, the patient can more easily accept the nuclear magnetic resonance examination, and diseases can be timely found for treatment; and a loudspeaker and a sound transmission conduit are arranged in the earplug, so that voice guidance can be provided for a patient in a matching procedure in functional magnetic resonance, and the patient can be helped to perform matching examination.
Description
Technical Field
The utility model relates to the field of medical instruments, in particular to a silencing earphone for nuclear magnetic resonance.
Background
The nuclear magnetic resonance is a medical imaging technology, which mainly utilizes the nuclear magnetic resonance principle to image the internal structure of a patient into a technology for providing diagnosis basis for doctors through nuclear magnetic resonance imaging equipment; nuclear magnetic resonance is a physical process that nuclear magnetic resonance with non-zero magnetic moment generates Zeeman splitting in a spinning energy level under the action of an external magnetic field and resonates and absorbs radio frequency radiation with a certain specific frequency; the nuclear magnetic resonance imaging technology can be used for checking various organs of a patient body and organs such as heart, brain, blood vessels and the like, helps doctors to find early lesions which are not easy to detect, and has important significance for early screening of tumors, cardiovascular and cerebrovascular diseases.
Because the nuclear magnetic resonance needs to apply a stronger external magnetic field, the metal substance with magnetism can be dragged to move at high speed under the action of the magnetic field, and serious safety threat is caused to patients; therefore, a patient needs to ensure that no metal substances exist on the body before examination, the patient not only comprises various metal ornaments, but also is not suitable for carrying out nuclear magnetic resonance examination on the patient with a stent, a steel plate, a cardiac pacemaker and the like implanted in the body; the existing nuclear magnetic resonance instrument is of a closed hole-shaped structure, a patient needs to be pushed into the instrument for examination for more than half an hour, the nuclear magnetic resonance instrument can generate large noise in the process, and huge noise exceeding 110 decibels can be generated to the maximum extent in a closed examination environment; for a patient, the patient is in a closed environment for a long time, and huge and continuous noises with various frequencies cause huge psychological stress on the patient, and part of the patients may not endure the examination environment of nuclear magnetic resonance, so that the examination cannot be performed, and the diagnosis opportunity is delayed.
In the functional magnetic resonance, the patient needs to perform different actions according to the examination procedure to cooperate with the examination, and the patient needs to be able to accurately receive the indication through the earphone and the noise, so that a loudspeaker function needs to be added to the earphone to provide the sound indication for the patient.
Since the nuclear magnetic resonance examination environment can not use metal-containing articles, the general commercial or medical sound insulation and noise reduction instruments are difficult to be directly applied to nuclear magnetic resonance examination; at present, special metal-free silencing equipment needs to be designed and developed aiming at the special use environment of nuclear magnetic resonance, so that the noise damage to patients is relieved, the psychological pressure of the patients is reduced, and more patients are helped to carry out nuclear magnetic resonance examination smoothly.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a silencing earphone for nuclear magnetic resonance, which is metal-free, has good sound insulation and silencing effects and has a loudspeaker function.
Based on the purpose, the utility model adopts the following technical scheme:
a noise reduction earphone for nuclear magnetic resonance comprises two symmetrically arranged earmuffs, wherein each earmuff comprises a trapezoidal earmuff shell, a plurality of layers of noise reduction structures are arranged in the earmuff shells, and an opening is formed in one side with a larger bottom area; a damping connecting plate is arranged at the opening of the shell of the earmuff; the damping connecting plate is provided with the acoustical panel on the side towards the people's ear, and the acoustical panel is fixed for being provided with the amortization ear pad towards a side top edge a week of people's ear, and the center is provided with the earplug.
Preferably, a connecting table is arranged in the shell of the ear muff, and the damping connecting plate is connected with the connecting table through a plurality of damping springs; the damping spring is a rubber spring.
Preferably, the multilayer sound attenuating structure comprises a sound insulating fiber filling layer and a vacuum cavity; the vacuum cavity is arranged between the two sound insulation fiber filling layers, and a plurality of layers of porous sound absorption plates are arranged in the vacuum cavity in a staggered mode.
Preferably, a conduit through hole is formed in the central position of the inner part of the earplug along the length direction of the earplug, and a loudspeaker is arranged at one end of the inner side of the conduit through hole; a sound transmission conduit is arranged in the conduit through hole, one end of the sound transmission conduit is connected to a sound emitting hole arranged at the top end of the earplug, and the other end of the sound transmission conduit is connected to a loudspeaker arranged in the earplug.
Preferably, the shell of the earmuff is made of a sound-insulating ceramic structure, and a sound-absorbing felt is arranged on the inner wall surface of the shell of the earmuff.
The utility model has the following beneficial effects:
the utility model adopts the appearance of the earphone, the ear muffs are internally provided with a multilayer sound insulation and silencing structure, and the noise transmitted by solid vibration is reduced by a separated damping design; meanwhile, the earphone-type noise reduction structure is used, and the earplugs are arranged at the same time, so that the passive noise reduction effect is further enhanced, and the noise damage to a patient in nuclear magnetic resonance is reduced to the greatest extent.
The utility model adopts a sound insulation structure with various structures and various methods, firstly, a sound insulation ceramic shell and a sound insulation felt are used at the outermost side for isolating and absorbing noise, and then, the inner side is staggered with a plurality of sound insulation fiber filling layers and vacuum cavities for further absorbing and isolating the noise penetrating through the shell and entering the earmuffs; partial frequency's sound can drive the ear muff and take place vibrations and produce the noise, consequently has set up the spring shock attenuation of disconnect-type and abate the board near the one end of people's ear to still set up the earplug and regarded as the amortization means of last step, accomplished to the biggest restriction to the nuclear magnetic resonance noise.
The utility model also provides a sound transmission tube for transmitting sound, the sound transmission tube extends into the ear of a person through the guide tube through holes arranged in the sound attenuation plate and the earplug and transmits the sound to the ear of a patient wearing the utility model through the sound emission hole; the other end of the sound transmission tube is connected to a radio receiver, and medical staff can transmit sound to the ears of the patient wearing the utility model through the radio receiver and indicate the patient to advance the examination progress.
Drawings
FIG. 1 is a front view of embodiment 1 of the present invention;
fig. 2 is a partial cross-sectional view of an earmuff structure according to embodiment 1 of the utility model;
FIG. 3 is a schematic view of a shock-absorbing connecting plate structure in embodiment 1 of the present invention
FIG. 4 is a schematic view of the overall structure of embodiment 2 of the present invention;
FIG. 5 is a schematic view of the structure of the parts at the earplug in embodiment 2 of the utility model;
FIG. 6 is a partial cross-sectional view of an earmuff structure of the present invention;
FIG. 7 is a schematic structural view of example 3 of the present invention;
fig. 8 is a wearing view of embodiment 3 of the present invention.
In the figure: an ear muff 1; an earmuff housing 11; a connecting table 12; a damper spring 13; a sound-insulating fiber-filled layer 14; a porous sound-absorbing panel 15; an earplug 16; a sound-deadening ear pad 17; a shock-absorbing connecting plate 18; a limit table 181; a sound-deadening sheet 19; an ear hook 2; a speaker 3; the sound emitting holes 31; a sound-transmitting duct 32; an earphone line 33.
Detailed Description
Example 1
As shown in fig. 1 and 2, the earphone with earmuffs of the utility model comprises two earmuffs 1; elastic connection presss from both sides 2 and is the arc structure, and its both ends are provided with telescopic expansion plate 21 respectively, and telescopic expansion plate 21's the other end fixed connection is on ear muff 1.
The earmuffs 1 are in a ladder-shaped structure, one side with larger bottom area is close to the ears of a person, and the other side with smaller bottom area faces outwards; as shown in fig. 2, the earmuff 1 comprises an earmuff shell 11, the earmuff shell 11 is made of a sound-proof ceramic structure, an opening is arranged on one side with a larger bottom area, a connecting table 12 is arranged inside the earmuff shell, the connecting table 12 is a platform structure arranged along the edge of the earmuff shell 11, and a plurality of damping springs 13 are arranged on the connecting table 12; the damping spring 13 is a rubber spring and does not contain metal; the other end of the damping spring 13 is connected with a damping connecting plate 18, the damping connecting plate 18 is made of rubber materials, the shape edge of the damping connecting plate is matched with the shape of the edge of the opening end of the earmuff shell 11, and the inner side of the damping connecting plate is provided with a limiting table 181 matched with the earmuff shell 11 and used for sealing the opening of the earmuff shell 11 and limiting the damping connecting plate 18; the other side of the shock absorption connecting plate 18 is fixedly connected with a sound absorption plate 19 with the same contour as that of the shock absorption connecting plate 18, the sound absorption plate 19 is made of porous loose materials, and the middle position of the other side of the sound absorption plate is fixedly provided with an earplug 16; on the side where the earplugs 16 are provided, sound-deadening ear pads 17 are fixedly provided at the edges of the sound-deadening panels 19.
A multiple noise reduction structure is arranged in the earmuff shell 11 and comprises two sound insulation fiber filling layers 14, a vacuum cavity is arranged between the two sound insulation fiber filling layers 14, and a plurality of porous sound absorption plates 15 are arranged in the vacuum cavity in a staggered manner; the multiple noise reduction structure absorbs noise by using the sound insulation fiber filling layer 14, absorbs sound waves by using a large number of communicated tiny pores of fiber filled contents, and absorbs and weakens the noise passing through the earmuff shell 11; the sound waves passing through the first sound insulation fiber filling layer 14 enter the vacuum cavity, and the transmission of the sound waves of noise is limited due to the fact that air in the vacuum cavity is thin; noise in the rarefied air further passes through the porous sound-absorbing plates arranged in a staggered mode, and sound waves are further absorbed and consumed; and then, a sound effect is used as a filling layer 14 to reduce the noise to the minimum.
The utility model is used for nuclear magnetic resonance examination, and because no metal is allowed to enter the nuclear magnetic resonance examination, the structure of the utility model does not contain any magnetic metal, and all the parts adopt non-metal elements; when in use, before entering a nuclear magnetic resonance instrument, a patient wears the utility model on two ears, plugs the earplugs 16 into the auditory meatus and ensures that the silencing ear pad 17 completely covers the whole ear; after the wearing is confirmed to be correct, the patient enters a nuclear magnetic resonance imaging instrument to start nuclear magnetic resonance examination.
Noise generated by the instrument in nuclear magnetic resonance firstly passes through the earmuff shell 11 made of sound-insulating ceramic materials and then is silenced through the multilayer silencing structure inside; the multilayer sound attenuation structure comprises two sound insulation fiber filling layers 14 and a vacuum cavity clamped between the two sound insulation fiber filling layers 14, and can cut the sound wave of noise to the lowest level; part of the noise can cause the earmuff 1 to generate vibration, transmit the noise and emit secondary noise, so that a separated shock absorption structure is arranged at a part close to the ears of a human body and comprises a shock absorption connecting plate 18 connected through a plurality of shock absorption springs 13 made of rubber materials; the side of the shock absorption connecting plate 18 close to the human ear is provided with a sound absorption plate 19 which further isolates, absorbs and weakens the noise from the shock; finally, the earplug 16 is inserted into the ear canal to further isolate the noise; from the earplug shell 11, the noise is weakened through the seven-layer sound insulation structure, and finally the huge noise of more than 110 decibels is changed into slight noise which can be accepted by a patient, so that the experience of the patient in nuclear magnetic resonance examination is greatly improved, and the patient can timely examine, and can discover and treat diseases as soon as possible.
Example 2
As shown in fig. 4-6, the present embodiment is not substantially different from the technical solution used in embodiment 1, and the main difference is that a conduit through hole is provided inside the earplug 16, and a sound transmission conduit 32 is provided inside the conduit through hole; the conduit through hole forms a sound emitting hole 31 on the outer end surface of the earplug 16, and the sound transmitting conduit 32 has one end connected to the sound emitting hole 31 and the other end connected to the inside of the speaker 3 provided inside the earplug 16.
As shown in fig. 6, the earphone 16 is provided with a speaker 3, the speaker 3 can output audio information to the patient according to the control of the examination program, instruct the patient to perform various actions or operations according to the requirements of the examination program, and perform the examination of functional magnetic resonance in coordination; sound emanating from the speaker 3 will pass through the ear plug 16 via the sound transmission conduit 32 and into the ear of the patient without being affected by the sound insulating structure of the ear plug.
When the functional magnetic resonance examination is carried out, the examination control which is programmed in advance is often used for assistance, a patient needs to carry out various actions according to the guidance of a program, at the moment, an audio instruction is needed, otherwise, various inconveniences are caused in the examination; the present embodiment has the speaker 3 disposed in the earplug 16, and can transmit the sound directly to the ear of the patient by bypassing all the sound insulation structures through the sound transmission conduit 32, so that the sound is clear and reliable; the sound transmission duct 32 can be made of silica gel or PVC plastic, and does not contain metal elements inside, so that it can be used for nmr examination.
In order to exclude the sound-conducting duct 32 from being disturbed by noise and avoid noise, the sound-conducting duct 32 and the surroundings of the loudspeaker 3 may be covered with a flexible sound-insulating material, such as an acoustic felt or the like.
Example 3
As shown in fig. 7 and 8, in the present embodiment, a pair of mounting holes are provided on both side edges of the ear muff shell 11, through which the ear loops 2 are provided; the ear hook 2 is in a shape which can be fit with the root of the ear of a human body, and can reduce uncomfortable feeling when being worn; the ear hook 2 is added to provide the fixing function on the ears, so that the ear muffs 1 can be prevented from falling off to influence the using effect in use; in order to prevent noise caused by vibration and sound transmission, the ear hook 2 can be made of flexible damping and buffering materials such as silica gel.
The present invention is described in detail with reference to the specific embodiments, but the present invention is not limited thereto, and any changes or substitutions that can be easily made by those skilled in the art within the scope of the present invention disclosed in the present application should be covered by the protection scope of the present application, and therefore, the protection scope of the present invention should be subject to the protection scope described in the claims.
Claims (5)
1. The utility model provides a amortization earphone for nuclear magnetic resonance, includes two ear muffs that the symmetry set up, its characterized in that: each earmuff comprises a trapezoidal earmuff shell, a multilayer noise reduction structure is arranged in each earmuff shell, and an opening is formed in one side with a larger bottom area; a damping connecting plate is arranged at the opening of the shell of the earmuff; the side of the damping connecting plate facing the human ear is provided with a silencing plate, a silencing ear pad is fixedly arranged on the periphery of the upper edge of the side of the damping connecting plate facing the human ear, and an earplug is arranged in the center.
2. The acoustic earphone for nuclear magnetic resonance according to claim 1, characterized in that: a connecting table is arranged in the earmuff shell, and the damping connecting plate is connected with the connecting table through a plurality of damping springs; the damping spring is a rubber spring.
3. The acoustic earphone for nuclear magnetic resonance according to claim 1, characterized in that: the multilayer silencing structure comprises a sound insulation fiber filling layer and a vacuum cavity; the vacuum cavity is arranged between the two sound insulation fiber filling layers, and a plurality of layers of porous sound absorption plates are arranged in the vacuum cavity in a staggered mode.
4. The acoustic earphone for nuclear magnetic resonance according to claim 1, characterized in that: a conduit through hole is formed in the center of the inner portion of the earplug along the length direction of the earplug, and a loudspeaker is arranged at one end of the inner side of the conduit through hole; a sound transmission conduit is arranged in the conduit through hole, one end of the sound transmission conduit is connected to a sound emitting hole arranged at the top end of the earplug, and the other end of the sound transmission conduit is connected to a loudspeaker arranged in the earplug.
5. The acoustic earphone for nuclear magnetic resonance according to claim 1, characterized in that: the earmuff shell is made of a sound-insulation ceramic structure, and a sound-absorbing felt is arranged on the inner wall surface of the earmuff shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120989438.2U CN215420668U (en) | 2021-05-11 | 2021-05-11 | Noise reduction earphone for nuclear magnetic resonance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120989438.2U CN215420668U (en) | 2021-05-11 | 2021-05-11 | Noise reduction earphone for nuclear magnetic resonance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215420668U true CN215420668U (en) | 2022-01-04 |
Family
ID=79674815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120989438.2U Expired - Fee Related CN215420668U (en) | 2021-05-11 | 2021-05-11 | Noise reduction earphone for nuclear magnetic resonance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215420668U (en) |
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2021
- 2021-05-11 CN CN202120989438.2U patent/CN215420668U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220104 |