JP2013066039A - Artificial ear pinna - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an artificial ear pinna capable of stably and correctly measuring characteristics of an insertion type earphone or a canal type earphone, as well as having a good repeatability in the measurement results.SOLUTION: An auditory canal 2 of an artificial ear pinna 1 is formed to simulate hardness and a structure of a human ear pinna structure, the auditory canal 2 being composed of a soft material at near the entrance 4 thereof and of a hard material having larger hardness in an area beyond that. As a result, even if a canal type earphone with a soft ear piece or an insertion type earphone is inserted with different force, the earphone will not enter deeper than a certain point, thereby characteristics of the earphone can be measured stably and correctly, and repeatability of the measurement results can be improved. Also, by forming an interface of auditory canal pipes 5, 6 to be tapered to an axes, an insertion depth of the earphones can be more easily controlled due to an inward/outward deformation of the pipes by the insertion force. Furthermore, by forming a fitting or surface treatment part 7 in a corrugated pattern, for example, on at least one interface between the outer peripheral surface of the auditory canal pipe and the ear pinna, the air tightness can be improved when attaching/detaching the artificial ear pinna, and mechanical stability can be increased.

Description

        The present invention relates to an artificial ear shell that can stably and accurately measure the characteristics of an insertion-type earphone or a canal-type earphone in an artificial ear shell mounted on a dummy head microphone, and has excellent reproducibility of measurement results.

Conventional dummy head microphones were originally developed from the middle to the second half of the 20th century. At that time, there were almost no soft earphones or canal-type earphones that were frequently used in recent years. There was no need or requirement for precise acoustic measurements.
As a result, the ear canal structure of the artificial ear shell mounted on the dummy head microphone and the material of the ear canal part are not particularly stipulated in the international standards, and a simple hole is made in the ear shell part. And the entire ear canal was made of metal pipes.
In recent years, along with the development of portable audio devices, small earphones have come to be used frequently. Among them, soft insertion earphones and canal earphones with earpieces are particularly frequently used because they are less likely to leak sound and are superior in sound quality. As a result, there has been a demand for a measuring apparatus capable of measuring stably and accurately in a short time and having good reproducibility of measurement results from the viewpoint of improving quality in production and from the viewpoint of quality control.

On the other hand, due to the problem of preventing hearing loss due to long-term hearing of earphones, the sound pressure reproduced from headphones / earphones has been regulated. From this point of view, measurement can be performed stably and accurately, and the measurement results can be reproduced. There has been a demand for a measuring device with good characteristics.
In addition, these earpiece soft insertion type earphones and canal type earphones are used widely in noise canceling earphones, hearing aids, etc. by utilizing their excellent characteristics, and these characteristics can be measured stably and accurately. A measuring device with good reproducibility of results has been demanded.
The characteristics of these earphones and earphone devices must be measured with a dummy head microphone in consideration of the actual usage situation, but the measurement is unstable when using a conventional dummy head microphone. Inaccurate and the reproducibility of the measurement results was not good. When investigating the cause, the instability and inaccuracy affecting the measurement results of insertion-type earphones and canal-type earphones, and the lack of reproducibility of the measurement results depend on the structure of the ear canal. It has been found that there is a problem with the shell structure. The problem is that the earphones that are inserted into the human ear shell are used for measurement using artificial ear shells having a structure that is significantly different from the structure of the human ear shell.

Hereinafter, the conventional ear canal structure of the artificial ear shell, the material constituting the ear canal, and the surface treatment will be described with reference to FIGS. 2, 3, 4, 5, 6 and 7.
In the figure, the ear shell main body 1 is generally made of an elastomer such as rubber, and it is common to form a hole when forming the ear shell to form the ear canal 2. Here, the ear canal 2 starts from an ear canal entrance point (EEP) 4 located at the bottom of the auricle oral cavity 3, which is a depression extending near the entrance of the ear canal, and ends with a predetermined length. Since the ear canal 2 needs to be airtightly coupled to the microphone device 10 used by being attached to the terminal portion, the ear canal 2 is configured by a hard pipe 5 made of metal or the like as shown in FIG. In general, it is also common to have a structure that can be detached from the ear shell. Some of the fitting portions between the ear shell and the detachable ear canal are provided with a surface treatment portion 7 in which a waveform is fitted and the degree of adhesion is increased.

    Further, most of the earpieces at the tip of the insertion type earphone 8 that have been conventionally used are hard and large, and the earphone main body is supported by the auricle oral cavity 3 as shown in FIGS. 4 and 5, and the earphone tip is at the ear canal entrance point 4. There were few things that were used in contact with the ear canal and pushed into the ear canal 2. Therefore, little consideration has been given to the structure and material of the ear canal 2. However, in the case of the soft insertion type earphones and canal type earphones 9 that are often used in recent years, the housing is also small, and these earphones are held by the earpieces at the tip of the earphones contracted by insertion into the ear canal 2, and the ear canal Is made of a soft material, the ear canal entrance is held by a mutual force that is expanded oppositely as shown in FIG. This is the same as in the case of the real ear, but there is a problem that the earphone can enter anywhere due to the force of insertion. In addition, when the artificial ear shell is made of a hard material and the ear canal is hard, or is made of a hard pipe such as metal, the ear canal does not expand, and only the earpiece at the tip of the earphone contracts as shown in FIG. Held by force. Here, if the outer diameter of the earpiece is small, it will go in any place, in addition to instability of holding, it is difficult to measure at the original position, measurement stability and accuracy, and reproducibility of measurement results An excellent artificial ear shell has never been provided.

Patent application Hei 10-548946

IEC60959 (IEC60381-7) ITUT-P57

    When the ear canal of the conventional artificial ear shell described above has a structure in which a hole is formed in the material constituting the ear shell, there may be a problem due to the hardness of the ear shell material. In other words, if the ear shell is made of a soft material, it may stay near the entrance of the ear canal due to the force with which the earphone to be measured is inserted, or it may go deeper into the earphone and the earpiece at the tip of the earphone. The incompatibility with the road changed and became unstable, so that accurate measurement was not possible, the reproducibility of the measurement results was not only poor, and measurement at the original length of the ear canal was not possible. On the other hand, when the ear canal is made of a hard material and the ear canal opened there is hard, or when the ear canal is made of a hard pipe like metal, the ear canal shape will be Without deformation, only the earpiece at the tip of the earphone to be measured is compressed and deformed. As a result, depending on the size of the earpiece, it may not be able to be inserted into the ear canal, or conversely, it may go deeper into the earpiece. The measurement was unstable and inaccurate, and the reproducibility of the measurement results was poor.

    Considering the human ear canal structure as shown in FIG. 8, the cartilage 11 and the skull 12 are arranged around the ear canal, and the ear canal is reinforced at the outer periphery. And these serve as a kind of stopper, thereby stably holding and positioning the earphone. Therefore, the artificial ear shell that can be used for the measurement of the earpiece soft insertion type earphone and canal type earphone 9 that are often used in recent years is a mechanical operation when the earphone is inserted into the human ear canal. A structure that can simulate the above is preferable. Therefore, the present invention is intended to solve the problems of such a conventional configuration, and by making the ear canal structure close to the human ear hole, as in the case of insertion into the human ear, It stabilizes the fitting between the earpiece at the tip of the earphone and the ear canal, improves the reproducibility of measurement results more accurately and realizes stable measurement at the original length of the ear canal.

In order to solve the above problems, the following means are considered. That is,
・ In the artificial ear shell with the ear canal in the ear shell, the ear canal portion 1.5 mm to 7 mm inward from the ear canal entry point 4 (EEP) has a Shore “A” hardness of 30 ° or less or Shore “00”. “An artificial ear shell having an auditory canal made of a soft material having a hardness of 40 ° or less and the subsequent auditory canal made of a material larger than the above hardness.
Note that the ear canal entrance point (EEP) is defined and defined in Non-Patent Document 2.
-In an artificial ear shell having an ear canal in the ear shell, the ear canal part constituting the ear canal is constituted by a pipe, and the ear canal pipes having different hardness, length, inner diameter, outer diameter or thickness are connected. An artificial ear shell composed of

-Population with ear canal in the ear shell In the ear shell, at least one of the ear canal pipes constituting the ear canal is a part of the ear canal pipe made of a material constituting the ear shell. Ear shell ・ In the artificial ear shell with the ear canal in the ear shell, the joint surface of the ear canal composed of the soft material constituting the ear canal and the ear canal made of a hard material following the ear canal An artificial ear shell having an ear canal that is in contact with the axis of the ear canal at the entrance side of the ear canal or the inside of the ear canal.
・ In the artificial ear shell having an ear canal in the ear shell, a fitting portion such as a corrugated portion is formed on the outer peripheral surface of the at least one ear canal pipe and the ear shell joint surface, and the air tightness and the machine at the time of attaching / detaching the artificial ear shell Artificial ear shells designed to improve overall stability.

    As a first problem solving means for achieving the above object, in the artificial ear shell having an ear canal in the ear shell, attention is paid to the structure of the human ear shell, and the ear made of a soft material having a hardness different from that of the ear shell material. The road part 5 is arranged in a length of 1.5 mm or more and 7 mm or less inward from the entrance point 4 of the ear canal, and the subsequent ear canal is made of a hard material having the above hardness or more. Is. In other words, considering the structure of the human ear, the vicinity of the entrance is soft, but the bones such as the cartilage 11 and the skull 12 are arranged so as to surround the ear canal as it goes to the heel of the ear canal. This is because the stiffness of the ear canal increases and functions as a kind of stopper to prevent the earphone from entering the bag. Here, as a material constituting the ear shell, an elastomer such as urethane, silicon, natural rubber, or synthetic rubber is generally used, and the hardness thereof is a Shore “A” hardness of 30 ° or less or a Shore “00” hardness. A soft material of 40 ° or less is close to the softness of a human ear shell. In this case, even if the material is the same, the hardness varies greatly depending on the additives used to cure it, so even if the material of the earshell and the material of the ear canal are the same, if the hardness is different Consider different materials. Therefore, when the ear shell 1 is a hard material, a soft material or the same material as the ear shell is disposed from the ear canal entrance point 4 to achieve a softness close to the human ear canal entrance. The subsequent auditory canal is hardened so that the earphone enters the heel and is controlled.

    The second problem-solving means is that, in an artificial ear shell having an ear canal in the ear shell, each ear canal part constituting the ear canal is formed of a pipe, and its hardness, length, inner diameter, outer diameter or This can also be realized by connecting individual ear canal pipes having different thicknesses. In this way, regardless of the earshell material, the stiffness of the pipe in the earphone insertion direction changes as it enters the heel from the entrance, and it becomes possible to control the entry of the earphone. In addition, when the earphone is inserted without dividing the ear canal pipe, the internal and external meridians of the ear can be gradually enlarged or reduced as the ear canal fistula is increased, or the pipe thickness is increased or decreased. The stiffness of the pipe may be changed to control the entry of the earphone into the ear canal.

    The third problem solving means is that, in an artificial ear shell having an ear canal in the ear shell, at least one of the plurality of pipes constituting the ear canal is made of a material constituting the ear shell and is a part of the ear canal pipe. Parts. In other words, if the material that forms the ear shell is soft enough to the human ear canal entrance, the ear shell and the ear canal pipe are not separated and a part of the same material is continuously used as the ear canal pipe at the ear canal entrance. If the ear shell material is hard, a soft ear canal pipe having a hardness different from that of the ear shell material is placed at the entrance of the ear canal. A part of the ear canal may be configured by connecting a part of the ear canal pipe connected first to the ear shell made of this hard material and the ear canal pipe continuously formed.

    The fourth problem-solving means is that, in the artificial ear shell having an ear canal in the ear shell, the ear canal portion at the entrance of the ear canal composed of the soft material that constitutes the ear canal, and the hard material that follows thereafter The artificial ear shell having an ear canal that is joined to the ear canal entrance side or the inner side of the ear canal with the joint surface of the ear canal made of the ear canal by the insertion force of the earphone. This is because when the road is deformed inward and outward, the stiffness of the pipe changes and becomes a blocking force, and the insertion depth can be controlled in balance with the deformation of the earpiece. The ear canal part in this case may be constituted by a pipe.

    Further, the fifth problem solving means is that, in an artificial ear shell having an ear canal in the ear shell, there is a fitting or adhesion degree of a waveform or the like between the outer peripheral surface of the at least one ear canal pipe and the ear shell joint surface. The surface treatment part which becomes high is formed. This is to ensure the airtightness between the ear shell and the ear canal when the ear canal pipe is connected to the measurement microphone and is integrally detached from the ear shell.

    The operation of the first problem solving means achieves softness close to the human ear canal entrance by arranging a suitable soft material of the ear canal part at the entrance of the ear canal, regardless of the earshell material. Smoothly fits with the tip earpiece. In addition, the hardness of the subsequent auditory canal can be hardened to control the entry into the ear canal by the earphone insertion pressure.

    The effect of the second problem solving means is that the individual auditory canal parts constituting the auditory canal can be constituted by pipes irrespective of the ear shell material, and a soft material pipe is entered at the ear canal entrance and enters the coral. By connecting and connecting the ear canal pipes with different hardness, length, inner diameter, outer diameter, or wall thickness, the stiffness of the pipe in the earphone insertion direction can be changed easily and freely. You will be able to control the approach.

    The action of the third problem solving means is that when the material forming the ear shell is as soft as the human ear canal entrance, a part of the ear shell material is continuously formed as an ear canal pipe at the ear canal entrance. Thus, by making it a part of the ear canal pipe, the softness of the human ear canal entrance can be easily realized without making the ear canal pipe with a particularly soft material. Conversely, if the ear shell material is hard, a soft ear canal pipe having a hardness different from that of the ear shell material is placed at the entrance of the ear canal, and then part of the ear shell made of a hard material is hard. By continuously forming the ear canal pipe as a part of the ear canal pipe, it is possible to more easily control the entry of the earphone into the ear canal by the insertion pressure without making the ear canal pipe from a particularly hard material.

    The effect of the fourth problem solving means is that at least one of the joint surfaces of the plurality of ear canal pipes having different hardnesses is tapered toward the ear canal entrance side or inside the ear canal with respect to the axis of the ear canal. The ear canal material is deformed inward and outward by the insertion force of the earphone, so that the stiffness of the pipe changes, and the insertion depth can be controlled in balance with the deformation of the earpiece.

    The action of the fifth problem solving means is that when the ear canal pipe is connected to the measurement microphone to be integrated and detached from the ear shell, a waveform or the like is fitted to the outer periphery of the ear canal pipe and the ear shell joint surface. By forming a mat or surface treatment, when the ear canal pipe is detached from the ear shell, it can be tightly coupled, and it can be kept airtight without air leakage, and the measurement accuracy The effect of improving.

As described above, since the softness of the individual parts from the entrance to the eyelid constituting the ear canal of the artificial ear shell of the present invention can be changed, the fitting with the earpiece at the tip of the earphone is made smooth, and the human ear Can be brought close to the state in which the earphone is inserted, and stable, accurate, and excellent measurement result reproducibility can be achieved. In this case, by configuring each part with a pipe, changing the softness, length, and thickness of each pipe from the entrance to the heel, and between the ear canal pipes with different hardnesses By changing the joint angle, the size of the earpiece at the tip of the earphone changes or the strength of insertion can be easily controlled, making it possible to measure at the original length of the ear canal and stable. Thus, accurate measurement with excellent reproducibility of measurement results can be achieved.
In addition, the outer periphery of the ear canal pipe and the ear shell joint surface are formed with a surface treatment that keeps the corrugation and airtightness, so that when the ear canal pipe is detached from the ear shell, it is firmly connected, and mechanical stability When the increase is mainly exerted the effect that air leakage can be prevented, and stable and accurate measurement with excellent reproducibility of measurement results can be achieved.

The artificial ear shell of the present invention Conventional artificial ear shell-1 Conventional artificial ear shell-2 Partial sectional view-1 showing an embodiment of a conventional artificial earshell and a conventional earphone Partial sectional view-2 showing an embodiment of a conventional artificial ear shell and a conventional earphone Partial sectional view 1 showing a problem embodiment using a conventional artificial ear shell-1 Partial sectional view 2 showing a problem embodiment using a conventional artificial ear shell-2 Human ear shell structure diagram The fragmentary sectional view of the artificial ear shell which shows embodiment of this invention Sound pressure frequency characteristics when the present invention is implemented Sound pressure frequency characteristics when not implementing the present invention

Hereinafter, embodiments of the present invention will be described with reference to FIG. 1, FIG. 9, and FIG.
In the figure, the ear shell main body 1 is generally made of an elastomer such as silicon rubber, and conventionally, when the ear shell is molded, a hole is generally formed as the ear canal 2. Constitutes another auditory canal portion with independent members 5, 6 and the like. Here, the ear canal 2 starts from an ear canal entrance point (EEP) 4 (EEP: Ear canal entrance point) located at the bottom of the auricular oral cavity 3 which is a depression extending in the vicinity of the entrance to the ear canal, and ends with a predetermined length. Note that the ear canal entrance point (EEP) is defined and defined in Non-Patent Document 2. The ear canal according to the present invention has a first auditory canal of 1.5 mm or more and 7 mm or less inward from the ear canal entrance point 4 and has a shore “A” hardness of 30 ° or less or a shore “00”. “It is made of a soft material having a hardness of 40 ° or less. The subsequent auditory canal is made of an auditory canal made of a material harder than the above hardness.

    Here, the individual ear canal parts constituting the ear canal may be configured by independent pipes, and the individual ear canal pipes having different hardness, length, inner diameter, outer diameter, or thickness are connected. It can also be realized by configuring. By doing so, the stiffness in the direction of inserting the earphone changes as it enters the bag from the entrance, so that the entry of the earphone can be controlled. In addition, when the earphone is inserted without dividing the ear canal pipe, the internal and external meridians of the ear can be gradually enlarged or reduced as the ear canal fistula is increased, or the pipe thickness is increased or decreased. The approach of the earphone to the ear canal can be controlled by changing the stiffness.

    Further, at least one of the ear canal pipes constituting the ear canal constitutes a part of the ear canal pipe using a material constituting the ear shell. In other words, if the material forming the ear shell is soft enough to the human ear canal entrance, a part of the ear shell material is continuously formed as an ear canal pipe at the ear canal entrance to form a part of the ear canal pipe. If the ear shell material is hard, the ear canal pipe is made of a soft material with a hardness different from that of the ear shell material, and the hard material is placed on the part of the subsequent ear canal pipe. A part of the ear canal may be formed by connecting an ear canal pipe made continuously with an ear canal pipe formed continuously.

    Further, when at least one of the joint surfaces of a plurality of ear canal pipes having different hardness, which constitute the ear canal, is tapered toward the ear canal entrance side or the inside of the ear canal with respect to the axis of the ear canal, the earphone can be inserted. As the ear canal material deforms in and out by force, the stiffness of the pipe changes, and the insertion depth can be controlled in balance with the deformation of the ear piece.

Further, when the microphone device 10 is attached to the end portion of the ear canal pipe constituting the ear canal, the ear canal 2 and the microphone device need to be airtightly coupled. It is also possible to configure the pipe with a hard pipe 6 made of metal or the like so as to be integrated with the microphone device 10 and detached from the ear shell. And, in the fitting part between the ear shell and the detachable ear canal, the surface treatment part 7 that increases the fitting and adhesion of the corrugation etc. is formed, so that the mechanical stability at the time of detachment is mainly increased. The effect of being able to prevent air leakage is exhibited.
With these new inventions, even when a soft insertion type earphone or canal type earphone 9 of an earpiece that has been widely used in recent years is measured, the holding of these earphones is stable and appropriate as in the case of the real ear. Since the approach is controlled by the position, it is possible to provide an artificial ear shell with excellent measurement stability and accuracy and reproducibility of measurement results.

Embodiments of the present invention will be described below with reference to FIGS. 1, 9, 10, and 11. FIG.
In the figure, the ear shell main body 1 is made of silicon rubber having a Shore “00” hardness of 35 °, which is a kind of elastomer. In the implemented ear canal, the material used for the ear shell is soft and close to the softness of human skin etc., so in the embodiment, an independent ear canal pipe is not used, but the material constituting the ear shell is used for the ear canal pipe. Partly configured. That is, from the ear canal entrance point (EEP) 4 to about 3.5 mm is regarded as the first ear canal, and an ear canal having an inner diameter of about 7.5 mm without separating the ear shell and the ear canal portion. Molded integrally to form the first ear canal. The subsequent auditory canal was made of hard stainless steel. In this case, an ear canal where the first soft ear canal end and the second hard stainless ear canal end contact each other with an inward taper was created and connected. Thereby, when the earphone is inserted, a force that is pulled in the direction of the ear canal center is generated in the first soft ear canal wall surface, the stiffness of the pipe changes, and the insertion depth can be controlled in balance with the deformation of the earpiece, We were able to approach the work of the human ear canal structure. In addition, the outer periphery of the ear canal part made of second stainless steel and the fitting part of the ear shell are formed with corrugated fittings so that mechanical stability at the time of desorption and increase and air leakage does not occur. . As a result, the ear shell and the first and second ear canals could be reliably and stably detached without causing air leakage.

    With these new inventions, even when a soft insertion type earphone or canal type earphone 9 of an earpiece that has been widely used in recent years is measured, the holding of these earphones is stable and appropriate as in the case of the real ear. Since the approach is controlled by the position, it was possible to provide an artificial ear shell with excellent measurement stability and accuracy and reproducibility of measurement results. FIG. 10 shows the characteristics of the canal-type earphone 9 using the artificial ear shell according to the present invention overlaid with the results of five random sound pressure frequency characteristics measurement results, and FIG. FIG. 11 shows the characteristics of the canal type earphone 9 measured using the artificial ear shell having the produced ear canal and overwritten with five random sound pressure frequency characteristic results. From these measurement results, the superiority of the present invention over the conventional structure is apparent.

    In recent years, along with the development of portable audio devices, small earphones have come to be used frequently. Among them, the soft insertion earphones and canal earphones with earpieces are particularly often used because they are less likely to leak sound and are superior in sound quality. From the standpoint of improving manufacturing quality and quality control Therefore, there has been a demand for a measuring apparatus that can stably and accurately measure in a short time and has good reproducibility of measurement results. On the other hand, due to the problem of hearing loss due to long-term hearing of earphones, the sound pressure reproduced from headphones / earphones is regulated, so that measurement can be performed stably and accurately, and measurement results can be reproduced with good reproducibility. A device has been sought. In addition, this earpiece's soft insertion type earphone and canal type earphone use its excellent characteristics and are widely used in noise canceling earphones, hearing aids, etc., and these characteristics can be measured stably and accurately, and There has been a demand for a measuring apparatus with good reproducibility of measurement results.

    These earphone characteristics must be measured with a dummy head microphone in consideration of the actual usage situation, but the measurement with the conventional dummy head microphone is unstable and the reproducibility of the measurement results is good. There wasn't. Examining the cause, it has been found that the shape of the ear, which depends on the structure of the ear canal, especially in the insertion type earphone and the canal type earphone. That is, it has been found that the ear canal structure of the artificial ear shell mounted on the conventional dummy head microphone is largely different from that of humans. Therefore, by using the artificial auricle which is the invention of the present application, an artificial ear shell that is stable and accurate in a short time and has excellent reproducibility of measurement results is provided.

・ Ear shell body
・ The ear canal
・ A dent (auricular oral cavity) spreading near the entrance to the ear canal
・ Ear canal entrance point (EEP)
・ Pipes that make up the ear canal and are placed at the ear canal entrance
・ Pipes that form the ear canal and are placed after the ear canal entrance
・ The fitting part of the ear shell and ear canal
・ Conventional insertion type earphone
・ Soft earpiece insertion type and canal type earphone
・ Microphone device
・ Cartilage
・ Skull

Claims (5)

    In an artificial ear shell having an ear canal in the ear shell, the ear canal portion of 1.5 mm to 7 mm inward from the ear canal entry point (EEP) has a Shore “A” hardness of 30 ° or less or a Shore “00” hardness. Is an artificial ear shell having an ear canal portion made of a soft material having a hardness of 40 degrees or less, and the subsequent auditory canal made of a hard material larger than the above hardness.     In an artificial ear shell having an ear canal in the ear shell, the ear canal part constituting the ear canal is composed of a pipe, and the ear canal pipes having different hardness, length, inner diameter, outer diameter, or thickness are connected. The artificial ear shell according to claim 1, wherein the artificial ear shell is constructed.     In an artificial ear shell having an ear canal in the ear shell, at least one of the ear canal pipes constituting the ear canal is integrated with the material constituting the ear shell without separating a part of the ear canal pipe from the ear shell. The artificial ear shell according to claim 1, wherein     In an artificial ear shell having an ear canal in the ear canal, the joint surface of the ear canal composed of the soft material constituting the ear canal and the subsequent ear canal made of a hard material is the ear canal. The artificial ear shell according to claim 1, wherein the ear canal has an ear canal that is in contact with the axis of the ear canal in a tapered shape on the entrance side of the ear canal or on the inner side of the ear canal. In the artificial ear shell having an ear canal in the ear shell, a fitting portion such as a corrugated portion is formed on the outer peripheral surface of the at least one ear canal pipe and the ear shell joint surface, so that airtightness and mechanicalness at the time of the artificial ear shell removal and attachment are formed. The artificial ear shell according to claim 1, wherein stability is improved.

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