EP2577998A1

EP2577998A1 - Ear coupler and hearing test system

Info

Publication number: EP2577998A1
Application number: EP11725405.2A
Authority: EP
Inventors: Morten HØST
Original assignee: GN Otometrics AS
Current assignee: GN Otometrics AS
Priority date: 2010-06-04
Filing date: 2011-06-03
Publication date: 2013-04-10
Also published as: CN103155600B; JP2013530745A; JP5778763B2; CN103155600A; WO2011151447A1

Abstract

An ear coupler includes a dome-shape member having a wall, a flange extending from the wall and circumscribing at least a part of the member, and an opening in the wall of the member. An ear coupler includes a member having a cavity for accommodating an ear, a flange extending from the wall and circumscribing at least a part of the member, and a structure extending from the wall, the structure having an end with a port.

Description

EAR COUPLER AND HEARING TEST SYSTEM

FIELD

[0001] The present invention relates to an ear coupler and a hearing test system, e.g. for use with auditory devices, and more particularly, to audiometric devices and methods.

BACKGROUND

[0002] A person may suffer from hearing impairment at an early age. Hearing impairment may occur in infants, and as early as when they are born. If hearing impairment is not detected early enough, then the child's language skills may be adversely affected, leading to potentially long-term disability. Thus, the most ideal time to test for an infant's hearing impairment is immediately after birth. Such early detection allows for early treatment. However, performing hearing tests on infants may be difficult because they cannot participate in conventional hearing tests, which require the subjects to provide feedback to indicate whether they can hear various stimulus signals.

[0003] Devices and methods have been used to evaluate infant hearing by subjecting the infant to an audio stimulus, and then measuring different responses, such as electroencephalographic or otoacoustic response, to the stimulus. Some existing hearing testing devices have a probe for insertion into an infant's ear. Such device would require a user to manually hold onto the probe to stabilize the device relative to the infant during use, which may be inconvenient for the user, especially if the performance of the hearing test require a lengthen period of time. Also, the probe of such device may not be comfortable for the infant's ear, since use of such device would require the probe to contact against the inner wall of the infant's ear canal. Furthermore, such device may not be safe for the infant since the distal tip of the probe may injure the ear canal of the infant. SUMMARY

[0004] It is an important advantage of the ear coupler of the present invention that auditory tests are facilitated substantially without risk to the person being tested.

[0005] Accordingly, an ear coupler is disclosed, the ear coupler including a dome- shape member having a wall, a flange extending from the wall and circumscribing at least a part of the member, and optionally an opening in the wall of the member. The ear coupler may comprise a structure extending from the wall, the structure having an end with a port. The port may communicate with the cavity formed by the dome-shaped member through the opening in the wall.

[0006] Also disclosed is an ear coupler, wherein the ear coupler includes a member, e.g. a dome-shaped member, having a cavity for accommodating an ear, a flange extending from the wall and circumscribing at least a part of the member, and a structure extending from the wall, the structure having an end with a port.

[0007] Also disclosed is a hearing test system comprising an ear coupler and a device adapted for coupling to the ear coupler. The device may comprise an acoustic transducer and/or the device may be configured to perform one or more of an otoacoustic emission test, an auditory brainstem response test, an acoustic reflectivity test, and a tympanometry test.

[0008] Other and further aspects and features will be evident from reading the following detailed description of the embodiments, which are intended to illustrate, not limit, the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The drawings illustrate the design and utility of embodiments, in which similar elements are referred to by common reference numerals. These drawings are not necessarily drawn to scale. In order to better appreciate how the above-recited and other advantages and objects are obtained, a more particular description of the embodiments will be rendered, which are illustrated in the accompanying drawings. These drawings depict only typical embodiments and are not therefore to be considered limiting of its scope.

FIG. 1 illustrates a perspective view of an ear coupler in accordance with some embodiments,

FIG. 2 illustrates a cross sectional view of the ear coupler of FIG. 1 ,

FIG. 3 illustrates a plan view of the ear coupler of FIG. 1 ,

FIG. 4 illustrates a method of using the ear coupler of FIG. 1 ,

FIG. 5 illustrates an ear coupler in accordance with other embodiments,

FIG. 6 illustrates an ear coupler in accordance with other embodiments,

FIG. 7 illustrates an ear coupler in accordance with other embodiments,

FIG. 8 illustrates an ear coupler in accordance with other embodiments,

FIG. 9 illustrates an ear coupler in accordance with other embodiments,

FIG. 10 illustrates a test system comprising an ear coupler as illustrated in Fig. 1 ,

FIG. 1 1 illustrates a test system comprising an ear coupler as illustrated in Fig. 5, and

FIG. 12 illustrates a part of a structure.

DETAILED DESCRIPTION

[0010] The ear coupler of the present invention enables testing of persons with reduced or no risk of injuring or causing damage to the ear canal of the person to be tested.

[001 1] The ear coupler comprises a member having a wall and a flange

circumscribing at least a part of the member. An opening is formed in the wall of the member, e.g. for guiding or allowing test signals to enter the cavity. The member or a part thereof may be transparent, e.g. in order to position the ear coupler correctly on a person. A first part of the member may be more transparent than a second part of the member.

[0012] The member of the ear coupler may comprise a first portion and a second portion attached to the first portion. The first portion may comprise a first material, and the second portion may comprise a second material. The second material may be stiffer than the first material. For example, the first portion may be made from thermoplastic elastomers, e.g. having a stiffness in the range from 25 Shore A to 40 Shore A, e.g. about 35 Shore A. The second portion may be made from thermoplastic elastomer, e.g. having a stiffness in the range from 40 Shore A to 55 Shore A, e.g. about 45 Shore A.

[0013] The first portion may comprise a first wall portion, and the second portion may comprise a second wall portion. The second wall portion may overlap or be sandwiched between at least a part of the first wall portion. The first portion may comprise a first end from which the flange extends, and optionally a second end that defines an opening. The second portion may cover the opening at the second end of the first portion.

[0014] The ear coupler may comprise an adhesive at the flange. A first side surface of the flange for facing the person may be partly or fully coated with the adhesive.

[0015] The ear coupler may comprise a barrier for covering at least a part of the adhesive.

[0016] The ear coupler may comprise one or more tabs extending from the flange e.g. in order to facilitate release or attachment of the ear coupler. The flange may be detachably secured to the member.

[0017] The ear coupler may comprise a structure that extends from the wall, the structure having an end, e.g. a first end, with a port. A second end of the structure may be attached to the wall or be positioned in the cavity. The port may communicate with the cavity through the opening in the member wall. The port may be sized so that a device is capable of coupling to the port via an interference or press fit. The structure may extend into the cavity of the member. Additionally or alternatively, the structure may extend outwardly from the wall. The structure may have a tubular configuration having an inner surface at least partly defining a cylinder. The cylinder or structure may have a length of at least 2 mm, e.g. at least 3 mm, or at least 4 mm. A length of the cylinder or structure in the range from 4 to 15 mm or even larger may be preferred. The structure may comprise a tubular element having an open first end constituting the port and a second end. The second end may be attached to the wall. The second end may be slanted, e.g. the second end edge may substantially extend in a second plane such that an angle between a centre axis of the tubular element and the second plane is in the range from 10° to 80°, such as in the range from about 30° to about 60°, e.g. about 45°. The tubular element may have any desired cross section, such as circular, elliptical, squared, rectangular, polygonal or other shapes, such as a customized shape. The tubular element may extend from the wall such that the centre axis of the tubular element is substantially parallel with the flange plane. An angle in the range from 0° to about 60°, e.g. less than 45° may be formed between a centre axis of the tubular element and the flange plane.

[0018] The length of the structure may be defined as the distance along a centre axis of the structure between a crossing point of the centre axis and a first plane at the first end of the structure and a crossing point of the centre axis and a second plane at the second end of the structure.

[0019] The inner surface of the structure may at least partly define a cylinder from the first end towards the second end. The inner surface of the structure may be adapted for connecting a hearing test system tube to the ear coupler. The structure may be adapted for press-fitting an end of a tube with the structure for coupling a hearing test system to the ear coupler. For example, the inner surface of the structure may at least partly define a truncated cone with a first cross sectional diameter di at or near the first end of the structure and a second cross sectional diameter d₂ at or near the second end of the structure, where di is larger than d₂. Additionally, or as an alternative, one or more ridges or protrusions on the inner surface may enable a press fit engagement between the ear coupler and a test tube. One or more recesses on the inner surface or slots in the structure wall may be configured to engage with a test tube end or test tube connector for coupling a hearing test system with the ear coupler. A structure configured for press fitting of a test tube may be advantageous since differently sized test tubes may be used for the ear coupler, thereby enabling the ear coupler to fit to differently sized test tubes.

[0020] The member may have a dome-shape. A dome-shape may be defined as a double-curved surface having a substantially smooth surface. Tangents to the outer surface of the wall of the dome-shaped member may form an angle with the flange plane in the range from 0° to about 85°, such as less than 80°, e.g. less than 75 °. A dome- shaped member may provide increased mechanical stability of the member.

[0021] Various exemplary embodiments are described hereinafter with reference to the figures. It should be noted that the figures are not drawn to scale and that elements of similar structures or functions are represented by like reference numerals throughout the figures. It should also be noted that the figures are only intended to facilitate the description of the embodiments. They are not intended as an exhaustive description of the invention or as a limitation on the scope of the invention. In addition, an illustrated embodiment needs not have all the aspects or advantages shown. An aspect or an advantage described in conjunction with a particular embodiment is not necessarily limited to that embodiment and can be practiced in any other embodiments even if not so illustrated.

[0022] FIG. 1 illustrates an ear coupler 10 in accordance with some embodiments. The ear coupler 10 includes a dome-shape member 12, a flange 14, and a structure 16 having an end 18 with a port 20. The dome-shape member 12 includes a wall 30 from which the flange 14 extends. The flange 14 circumscribes around the member 12, and has a surface 40 with an adhesive 42 (shown in FIG. 3). The ear coupler 10 may further include a barrier 44 for containing the adhesive 42 before the ear coupler 10 is used (see FIG. 3, which illustrates part of the barrier 44 being removed from the flange 14).

[0023] FIG. 2 illustrates a cross section of the ear coupler 10 in accordance with some embodiments. As shown in the figure, the member 12 includes a first portion 50 and a second portion 52. The first portion 50 has a first wall portion 60, and the second portion 52 has a second wall portion 62 that overlaps the first wall portion 60 to thereby form at least a part of the wall 30 of the ear coupler 10. In the illustrated embodiments, the second portion 52 is made from a material that is stiffer than the first portion 50. For example, in some embodiments, the first portion 50 may be made from a material (TP1 ) having a stiffness of 35 Shore A, and the second portion 52 may be made from a material (TP2) having a stiffness of 45 Shore A. Such configuration is advantageous in that the second portion 52 may function as a stiffening element for strengthening at least a part of the member 12. In other embodiments, the first and second portions 50, 52 may be made from the same material. Each of the first and second portions 50, 52 may be made from a variety of materials, including but not limited to TPE (Thermoplastic elastomers), Silicone rubber, or any of other types of rubber or polymers. Also, in further embodiments, the second portion 52 may be larger so that it completely overlaps the entire first portion 50. The length L of the structure 16 is about 7 mm. [0024] The second portion 52 may be overmolded with the first portion 50 during a manufacturing process. In such cases, the first portion 50 and the second portion 52 are fused together. In other embodiments, the first and second portions 50, 52 may be attached together by other techniques, such as via an adhesive, a screw, a snap-fit coupler, or other types of mechanical connections.

[0025] As shown in the illustrated embodiments, the wall 30 of the member 12 has an opening 70, which corresponds with the structure 16. The structure 16 has a tubular configuration to thereby define the port 20 at the end 18 of the structure 16. In the illustrated embodiments, the port 20 at the first end of the structure 16 has a circular cross section. In other embodiments, the port 20 may have other cross sectional shapes, such as an elliptical shape, a square shape, a rectangular shape, or other shapes, such as a customized shape. The port 20 is sized and shaped so that it allows an audio device 76 (shown in FIG. 4), such as an audiometric device, to couple thereto.

[0026] FIG. 3 illustrates a plan view of the ear coupler 10. As shown in the figure, the ear coupler 10 also includes a plurality of tabs 80 extending from the flange 14. The tabs 80 allow a user to decouple the ear coupler 10 from a subject by holding onto one of the tabs 80, and pulling the flange 14 away from the subject's skin. In the illustrated embodiments, the ear coupler 10 has two tabs 80. In other embodiments, the ear coupler 10 may have more than two tabs 80, or less than two tabs 80 (i.e., one tab 80). In further embodiments, the tab(s) 80 are optional, and the ear coupler 10 does not include any tab 80. In such cases, the ear coupler 10 may be decoupled from the subject by pulling the flange 14 away from the subject's skin.

[0027] In some embodiments, the entire ear coupler 10 is transparent. Alternatively, part of the ear coupler 10 may have one or more color. For example, part of the ear coupler 10 may include a graphic 81 that is in color. Also, in other embodiments, a part of the ear coupler 10 may be more transparent than another part of the ear coupler 10. For example, in other embodiments, the first portion 50 and the second portion 52 may be both transparent, with the first portion 50 being more transparent than the second portion 52. The transparency allows a user to see at least a part of a subject's ear while the user is putting the ear coupler 10 onto the subject, so that the user can place the ear coupler 10 at a desired position relative to the subject's ear.

[0028] As discussed, the ear coupler 10 is configured for use with an audio device, such as an audiometric device. In some embodiments, the audiometric device may be configured to perform one or more tests to test a hearing of a subject, such as an infant. Examples of tests that may be performed using the audiometric device include an otoacoustic emission test, an auditory brainstem response test, an acoustic reflectivity test, and a tympanometry test. As shown in FIG. 4, in one implementation, the audiometric device 76 includes a handheld unit 200 with a display screen 202, a first cable 204, and a second cable 208. The first cable 204 has three electrodes 206a-206c that are configured to be coupled to the subject's forehead, cheekbone, and nape of the neck, respectively, during use. The second cable 208 has two transducers 210 (one is shown) for detachably coupling to two respective ear couplers 10 (one is shown) during use. The audiometric device 76 is configured to generate one or more stimulus signals, which are transmitted to the subject's ears via the ear couplers 10. The stimulus signal(s) is for evoking a neural response, which is measured by the electrodes 206a- 206c, to thereby perform the auditory brainstem response test. The same stimulus signal(s), or other stimulus signal(s), may be used for evoking another response for the otoacoustic emission test, which is measured by the transducer 210. The display 202 is configured to display information relating to the hearing tests, such as parameters for conducting the tests, and test results. [0029] FIG. 4 illustrates a method of using the ear coupler 10 in accordance with some embodiments. During use, the barrier 44 is removed to expose the adhesive 42 on the flange 14. The ear coupler 10 is then attached to a subject's skin via the adhesive 42. If part of the ear coupler 10 is transparent, then the user of the ear coupler 10 can view through the ear coupler 10 to see the subject's ear, so that the user can center the ear coupler 10 with respect to the subject's ear. The audio device 76 is detachably coupled to the port 20 of the ear coupler 10 during use. In particular, the transducer 210 of the audio device 76 is detachably coupled to the ear coupler 10 via the port 20. Another transducer (not shown) that connects to the audio device 76 is also coupled to another ear coupler (not shown). Also, the electrodes 206a-206c from the audio device 76 are secured to the subject. In the illustrated embodiments, the audio device 76 is an audiometric device configured to perform an otoacoustic emission test and an auditory brainstem response test on the subject. In some embodiments, the audio device 76 is configured to provide a stimulus signal via the cable 208 to evoke a first response and a second response from the subject, wherein the first response (measured using the transducer 210) is for the otoacoustic emission test, and the second response (measured using the electrodes 206a-206c) is for the auditory brainstem response test. In other embodiments, the audio device 76 is configured to provide a first stimulus signal to evoke a first response for the otoacoustic emission test, and a second stimulus signal to evoke a second response for the auditory brainstem response test.

[0030] Also, instead of using ear couplers 10 to perform both the otoacoustic emission test and the auditory brainstem response test, the ear couplers 10 may be used to perform only one of the otoacoustic emission test and the auditory brainstem response test. In such cases, when performing the other one of the otoacoustic emission test and the auditory brainstem response test, the ear couplers 10 may be removed from the subject and detached from the audio device 76 (e.g., by detaching the ear couplers 10 from the transducers 210, or by detaching the cable 208 from the audio device 76). A probe (not shown) can then be attached to the audio device 76 (e.g., by attaching the probe to the transducer 210), and the probe is inserted into a subject's ear for delivering stimulus signal(s) for performing the other test.

[0031] As illustrated, the ear coupler 10 is advantageous because it obviates the need to insert a probe into a subject's ear during a hearing test, which may be uncomfortable for the subject, and/or may injure the subject's ear. Also, because the ear coupler 10 is capable of securing itself to the subject, use of the ear coupler 10 does not require the user to manually stabilize the ear coupler 10 relative to the subject's ear. Furthermore, the dome shape of the member 12 renders the member 12 less

susceptible (e.g., compared to a member 12 with a flat cover) to deformation and damage because of the arc-action provided by the dome shape in response to externally applied pressure or force. In addition, providing the port 20 via the structure 16 is more advantageous than providing a coupling port at the wall 30 of the member 12 for coupling to the audio device 76. This is because the structure 16 functions as a stiffening device that enhances the integrity of the port 20. If the device 10 does not include the structure 16, the transducer 210 will need to be directly coupled to the ear coupler 10 via a port at the wall 30, which weakens the wall 30. Such configuration will also subject the wall 30 to bending during insertion and removal of the transducer 210 relative to the wall 30, which is undesirable. In some embodiments, the opening 70 is configured to be larger than the port 20 so that when the transducer 210 is inserted into the port 20, the transducer 210 will not touch the wall portion that defines the opening 70. This has the benefit of ensuring that the structural integrity of the wall portion that defines the opening 70 is preserved.

[0032] In the above embodiments, the first portion 50 has a dome shape, and the second portion 52 overlaps part of the wall of the first portion 50. In other embodiments, the first portion 50 may have different configurations. For example, as shown in FIG. 5, in other embodiments, the first portion 50 may have a first end 82 with a first opening 84, and a second end 86 with a second opening 88. The first end 82 is attached to (e.g., integral with) the flange 14.

[0033] The second portion 52 (which includes the structure 16) is configured to cover the opening 88 at the second end 86 of the first portion 60, thereby forming the dome shape member 12. In some embodiments, the second portion 52 may be overmolded onto the first portion 50. Alternatively, the second portion 52 may be attached to the first portion 50 by an adhesive, a screw, a snap-fit connector, or other types of connectors.

[0034] In further embodiments, the second portion 52 may be configured to be detachably coupled to the first portion 50 (e.g., via a clip, threads, a snap-fit connector, friction, etc.), thereby allowing the second portion 52 to function like a removable cover. Such configuration is advantageous in that it allows a user to selectively open the cover 52 to directly view the subject's ear, and/or to directly communicate to the subject. Such configuration also allows a user to remove the cover 52 with the structure 16, and attach another cover 52 to the rest of the ear coupler 10. This is advantageous because it would allow the user to replace the cover 52 if it is broken. In such cases, the ear coupler 10 includes a plurality of covers 52 with a same size and shape. In other embodiments, the detachable configuration also allows a user to replace the cover 52 with a different configuration of the structure 16 (e.g., a cover 52 with a structure 16 having a different size and/or shape for coupling to a different audio device). In such cases, the ear coupler 10 may include a plurality of covers 52 with respective structures 16 having different configurations (e.g., sizes and/or shapes), wherein each structure 16 is configured to detachably couple to the rest of the ear coupler 10 at one end, and to an audio device at the other end of the structure 16. It should be noted that the cover 52 may be considered to be a part of the ear coupler 10, or a separate component that is configured to be coupled to the ear coupler 10.

[0035] In the illustrated embodiments, the first and second portions 50, 52 may be made from the same material. Alternatively, the second portion 52 may be made from a material that is different from that of the first portion 50. For example, in some embodiments, the second portion 52 may be made from a material that is stiffer than that of the first portion 50.

[0036] In other embodiments, the member 12 and the flange 14 of the ear coupler 10 may be formed as one piece during a manufacturing process, and the structure 16 is a separate component that is attached to the rest of the ear coupler 10 (FIG. 6). For example, the structure 16 may be overmolded onto the wall 30 of the member 12.

Alternatively, the structure 16 may be attached to the member 12 by an adhesive, a screw, a snap-fit connector, or other types of connectors. In the illustrated

embodiments, the member 12 and the structure 16 may be made from the same material. Alternatively, the structure 16 may be made from a material that is different from that of the member 12. For example, in some embodiments, the structure 16 may be made from a material that is softer than that of the member 12.

[0037] In further embodiments, the structure 16 may be configured to be detachably coupled to the member 12 (e.g., via a clip, threads, a snap-fit connector, friction, etc.). Such configuration allows a user to remove the structure 16 from the member 12, and attach another structure 16 to the rest of the ear coupler 10. This is advantageous because it would allow the user to replace the structure 16 if it is broken. In such cases, the ear coupler 10 may include a plurality of structures 16 that have a same size and shape. In other embodiments, the detachable configuration also allows a user to replace the structure 16 with another structure 16 with a different configuration (e.g., a structure 16 with a different size and/or shape for coupling to a different audio device). In such cases, the ear coupler 10 may include a plurality of structures 16 with different configurations (e.g., sizes and/or shapes), wherein each structure 16 is configured to detachably couple to the rest of the ear coupler 10 at one end, and to an audio device at the other end of the structure 16.

[0038] In some embodiments, the structure 16 may be made from a bendable material that can be bent by a user during use. Such configuration allows the user to selectively position the audio device (that is coupled to the ear coupler 10) so that the audio device is at a desired position relative to the ear coupler 10.

[0039] In other embodiments, the wall 30 and the structure 16 of the ear coupler 10 may be formed as one piece during a manufacturing process, and the flange 14 is a separate component that is attached to the rest of the ear coupler 10 (FIG. 7). For example, the flange 14 may be overmolded onto the wall 30 of the member 12.

Alternatively, the flange 14 may be attached to the member 12 by an adhesive, a screw, a snap-fit connector, or other types of connectors. In further embodiments, the wall 30 of the member 12 may include a slot 90, and the flange 14 may include a protrusion 92 configured to mate with the slot 90 (FIG. 8), thereby securing the flange 14 relative to the member 12. In other embodiments, the slot-protrusion configuration may be reversed - i.e., the flange 14 may have a slot, and the wall 30 of the member 12 may have a protrusion for mating with the slot at the flange 14. [0040] In further embodiments, the flange 14 may be configured to be detachably coupled to the member 12 (e.g., via a clip, threads, a snap-fit connector, friction, etc.). Such configuration allows a user to remove the flange 14 from the member 12, and attach another flange 14 to the rest of the ear coupler 10. In some embodiments, the ear coupler 10 may include a plurality of flanges 14 that have a same size and shape. This is advantageous because it would allow the user to replace the flange 14 if it is broken, or when the adhesive 42 becomes non-sticky. Alternatively, or additionally, the ear coupler 10 may include a plurality of flanges 14 that have different configurations (e.g., sizes and/or shapes), wherein each flange 14 is configured to detachably couple to the member 12 of the ear coupler 10. Such system allows a user to replace the flange 14 with another flange 14 with a different configuration (e.g., a flange 14 with a different size and/or shape).

[0041] In the illustrated embodiments, the member 12 and the flange 14 may be made from the same material. Alternatively, the flange 14 may be made from a material that is different from that of the member 12. For example, in some embodiments, the flange 14 may be made from a material that is softer than that of the member 12. Such configuration allows the flange 14 to conform to a profile of the subject's skin during use. In some embodiments, the flange 14 may be made from a compliant material that can be easily bent or deform upon pressing the flange 14 against the subject's skin.

[0042] In further embodiments, the ear coupler 10 may be made from one material, and the entire ear coupler 10 may be integrally formed as one piece to have a unity configuration. FIG. 9 illustrates another ear coupler 10 in accordance with other embodiments. As shown in the figure, the entire ear coupler 10, including the wall 30 of the member 12 of the ear coupler 10, the flange 14, and the structure 16, is formed (e.g., molded) as one piece during a manufacturing process. [0043] FIG. 10 illustrates an ear coupler system 100 that includes a plurality of ear couplers 10 with different configurations. Each of the ear couplers 10 may have any of the configurations described herein. In the illustrated embodiments, the ear couplers 10 have different sizes for accommodating different subjects' ears with different respective sizes. In other embodiments, the ear couplers 10 have different shapes for

accommodating different subjects' ears with different respective shapes. Each of the ear couplers 10 has a structure 16 with a port 20 for detachably coupling to a connector 210 of an audio device, such as the audiometric device 76 of FIG. 4. In the figure, one ear coupler of each size is shown. However, it should be understood that in some embodiments, the system 100 may provide pairs (one for left ear and one for right ear) of ear couplers 10 in different sizes (e.g., a pair of ear couplers 10 in one size, and another pair of ear couplers 10 in another size). Also, in further embodiments, the system 100 may include more than two pairs of ear couplers 10.

[0044] In other embodiments, as shown in FIG. 11 , each of the ear couplers 10 may have the configuration shown in FIG. 5. In such cases, the same cover 52 may be used to detachably couple the audio device to a selected one of the ear couplers 10. In the figure, one ear coupler of each size is shown. However, it should be understood that in some embodiments, the system 100 may provide pairs (one for left ear and one for right ear) of ear couplers 10 in different sizes (e.g., a pair of ear couplers 10 in one size, and another pair of ear couplers 10 in another size). Also, in further embodiments, the hearing test system 100 may include more than two pairs of ear couplers 10.

[0045] FIG. 12 is a cross sectional view of a part of a structure 16 extending from the wall of an ear coupler. The inner surface of the structure wall defines at least a part of a truncated cone with a first cross sectional diameter di at or near the first end of the structure forming the port 20 and a second cross sectional diameter d₂ towards the second end of the structure, where di is larger than d₂. The first cross sectional diameter di (base diameter) may be selected to be larger than the maximum typical outer diameter of test tube and the second cross sectional diameter d₂ (top diameter) may be selected to be smaller than the smallest typical outer diameter of a test tube. For example, di may be in the range from 6 to 10 mm, and d₂ may be in the range from 2 to 8 mm. The truncated cone formed by at least a part of the inner surface may have a height from 2 mm to about 20 mm, e.g. in the range from 4 mm to 12 mm. The length L of the structure may be at least 2 mm, such as for example about

[0046] Although particular embodiments of the present inventions have been shown and described, it will be understood that it is not intended to limit the present inventions to the preferred embodiments, and it will be obvious to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present inventions. The specification and drawings are, accordingly, to be regarded in an illustrative rather than restrictive sense. The present inventions are intended to cover alternatives, modifications, and equivalents, which may be included within the spirit and scope of the present inventions as defined by the claims.

Claims

1. An ear coupler, comprising:

a member having a wall forming a cavity for accommodating an ear;

a flange extending from the wall and circumscribing at least a part of the member; and a structure that extends from the wall, the structure having an end with a port.

2. Ear coupler according to claim 1 , wherein the structure has a length of at least 2 mm.

3. Ear coupler according to any of the claims 1-2, wherein a first part of the member is more transparent than a second part of the member.

4. Ear coupler according to any of the preceding claims, wherein the member comprises a first portion and a second portion attached to the first portion.

5. Ear coupler according to claim 4, wherein the first portion comprises a first material, and the second portion comprises a second material that is stiffer than the first material.

6. Ear coupler according to any of the claims 4-5, wherein the first portion comprises a first wall portion, and the second portion comprises a second wall portion.

7. Ear coupler according to claim 6, wherein the second wall portion overlaps at least a part of the first wall portion.

8. Ear coupler according to any of claims 4-7, wherein the first portion comprises a first end from which the flange extends, and a second end that defines an opening, and wherein the second portion covers the opening at the second end of the first portion.

9. Ear coupler according to any of the preceding claims, the ear coupler comprising an adhesive at the flange.

10. Ear coupler according to any of the preceding claims, the ear coupler comprising one or more tabs extending from the flange.

1 1 . Ear coupler according to any of the preceding claims, wherein the port is sized so that a device is capable of coupling to the port via an interference or press fit.

12. Ear coupler according to any of the preceding claims, wherein the member has a dome-shape.

13. A hearing test system comprising one or more ear couplers according to any of the claims 1 -12 and a device adapted for coupling to the ear coupler.

14. Hearing test system according to claim 13, wherein the device comprises an acoustic transducer.

15. Hearing test system according to any of the claims 13-14, wherein the device is configured to perform one or more of an otoacoustic emission test, an auditory brainstem response test, an acoustic reflectivity test, and a tympanometry test.