Abstract: An embodiment provides a seal for retaining a hearing device within the ear canal comprising a curved shell having an opening at a shell apex portion. The shell defines a cavity for retention of a device component. An interior surface of a shell wall has a scalloped shape configured to distribute compressive forces applied to the shell perimeter such that when the shell is positioned in the canal, the shell wall conforms to the shape of the canal to maintain an acoustical seal between a shell exterior surface and the canal walls. The scalloped shape can be configured to produce a substantially constant amount of inward deformation of a shell wall independent of a force application point on a shell perimeter. The shell can include a coating to retain the seal in the canal and/or to promote asparagine growth into the coating to fastenly retain the seal in the canal.

Abstract: An improved hearing aid device adapted for use within the ear canal of the CIC (Completely In the ear) and of the partially exposed ITC (In The Canal) type. This aid consists of a system of integrated parts allowing an air gap to substantially surround the hearing aid shell and air passages which communicate with the inner ear minimizing occlusion sensations and providing the user with an enhanced natural hearing experience. A key aspect of this device is the provision of air passages in the mounting insert which securely positions the hearing aid shell in the wearer's canal. These passages are designed to stay open after insertion of the aid in the ear canal. In use, unamplified sound from the outside passes around the hearing aid shell, through the air passages in the mounting insert blending with the amplified sound emanating from the receiver. The area of air passages in the mounting insert can be tailored by the technician adapting to the hearing loss characteristics of the user.

Abstract: An ear piece assembly (10, 100, 200, 300, 500, 600, 700, 800, 900, 1000) designed for a stethoscope or other headpiece, and configured to allow rotation of an ear tip (20, 120, 220, 320, 420, 520, 620) of the assembly about a central axis (relative to the rest of the assembly) and to allow limited off axis movement of the ear tip (relative to the rest of the assembly). In typical embodiments, the ear piece assembly is designed to fit a user's ear canal and stay in place during typical use without rotational or off axis movement of the ear tip relative to the ear canal, and to provide substantially more comfort to the user than would a headpiece with a conventional ear tip assembly, particularly for prolonged wearing by the user. Other aspects of the invention are a headpiece (e.g.

Abstract: An earphone and method for forming the same are provided. The earphone includes an earphone housing, a speaker, and an earcap. The earphone housing includes a speaker mounting portion. The speaker is fixed to the earphone housing, and has a cable that passes through the body and is drawn from the body. The earcap is installed to at least partially enclose the speaker and the housing, and has at least one speaker sound emitting hole therein. The earcap is made of a material that solidifies after a predetermined time elapses, and is manufactured by inserting the material into an ear of a user, and then solidifying the material such that it is suited for a shape of the ear of the user.

Abstract: A device (10) for hearing protection, comprising an elongated stem (11) and a grip part (12), wherein the stem (11) comprises a connecting portion (14) for connection with the grip part (12), an attachment portion (15) for attachment to an earplug (13) projecting radially to the stem (11) and being arranged for insertion into an ear canal (25), and an intermediate portion (16) arranged between the connecting portion (14) and the attachment portion (15). The stem (11) comprises a first curve (21) arranged between the connecting portion (14) and the intermediate portion (16) and a second curve (22) arranged between the attachment portion (15) and the intermediate portion (16), wherein the intermediate portion (16) is arranged in a first angle (?) to the connecting portion (14) and a second angle (?) to the attachment portion (15).

Abstract: The invention relates to an acoustic dampening fluid composition for reversibly, reducing the sensitivity of humans and animals to sounds such as fireworks to alleviate phobias in animals and to protect the hearing of humans exposed to sounds which would otherwise damage their hearing.

Abstract: Embodiments typically relate to ear tips for sound transmission devices, designed to fit snuggly in the user's ear canal and block external noise from the environment while being sufficiently comfortable for long-wearing and/or deep insertion. Embodiments may comprise a stem and a foam body, with the hollow stem lying on the centerline of the foam body. The foam body may comprise a concave opening in its nose, a rear extension flange projecting rearward to extend its length without significantly impacting perceived comfort, and/or a plurality of indentations about the periphery of the nose of the foam body. The foam body may be formed of polyurethane foam, and the stem may be formed of elastomeric polyurethane.

Abstract: An adaptation device that removably attaches to earbud style headphone/s and provides security and retention of the earbud to a wearer's ear.

Abstract: An ear protector (1) with a sound damping filter (3), comprises a membrane (5). The membrane is composed of a material that permits the transmission of air and water vapour with respect to the ear from the into the outside of the ear protector, the membrane is pre stressed mounted in the filter, enabling a bigger surface and hence bigger air and water transport at same sound attenuation.

Abstract: The adjustable mouth shield device provides an adjustably fitted mouth shield with adjustable headband for secure fit. The adjustable headband is fastened to the padded earpiece. The straight first extension from the earpiece is angled downwardly and forwardly to terminate in a swivel joint providing almost 360 degrees of swivel. The second extension is arced both downwardly and forwardly. The u-shaped mouthpiece is fitted to the adjustable spring mount for horizontal pivot of the mouthpiece. The mouthpiece may, by virtue of the swivel joint and the spring mount, be moved completely away from a user's mouth and, in turn, pivoted and swiveled to be directly in front of the user's mouth. The inward curves at the distal end of the mouthpiece aid in sliding on the disposable pads that shield a user from objects, foods and other materials.

Abstract: Methods and devices for sound isolation are provided. A sound isolation device includes an expandable element and an insertion element. The expandable element is operatively attached to the insertion element. The expandable element includes an expanding medium, where the pressure of the expanding medium is varied to vary a sound isolation across the expandable element.

Abstract: An adaptation device that removably attaches to earbud style headphone/s and provides improved security and retention of the earbud to a wearer's ear yet positions the speaker in substantially the same distance relative to the concha and/or ear canal of a wearer as a wearer would ordinarily wear an earbud.

Abstract: A hearing aid device has a shell that fits into the upper part of the concha of the outer ear of a hearing-impaired person, and connecting element that is held in the concha of the outer ear and terminates in an ear piece in the ear canal. The combination of the shell and the connecting element in the concha retain the hearing aid in the outer ear.

Abstract: A hearing protective earplug for insertion into the human ear canal of a user where the human ear canal has sidewalls and a typical curved portion. A soft resilient body has a main body element with a front end for insertion in the human ear canal. An elongated stem has two ends with one end attached to the main body element. The stem extends outward from the main body element and away from the front end. The other end of the stem forms a handle portion of the stem. The stem is sufficiently stiff as to allow manipulation of the main body element into the ear canal of the user. The stem member has a crooked or wavy configuration within the ear canal as it extends outward from the main body to the handle portion of the stem. As the front end of the main body element is inserted into the ear canal, the stem member is rotated during insertion with the handle portion to fit around the typical curved portion in the human ear canal.

Abstract: There is provided a headphone including: a housing that accommodates a driver unit; a sound guiding tube that protrudes from the housing in a predetermined direction and guides a sound generated from the driver unit to an external auditory canal; and a hanger that rotatably supports the housing via a supporting shaft provided in approximately the same direction as a depth direction of the external auditory canal and in a direction inclined to a protruding direction of the sound guiding tube. According to this structure, by rotating the housing with respect to the hanger via the supporting shaft, the protruding direction of the sound guiding tube with respect to the hanger can be adjusted. Thus, by adjusting the protruding direction of the sound guiding tube according to the inclined angle of the external auditory canal of a user, wearability of a headphone can be improved.

Abstract: A receiver is provided having a balanced armature motor mechanically interconnected to a displaceable diaphragm component. A front volume changes as the displaceable diaphragm component moves. The front volume is connected to a port. A rear volume changes oppositely to the front volume as the displaceable diaphragm moves. An acoustic channel connects to the port and is also connected to a sound outlet. The sound outlet allows acoustic energy to exit from the acoustic channel. A first acoustic pressure is generated in the front volume as the balanced armature motor moves the diaphragm. The acoustic channel and the internal volume are divided by a common wall section, wherein the common wall section is defined by at least one of the walls of the housing which also provides a portion of at least one wall for the acoustic channel.

Abstract: An ear tip piece device made of resilient material dimensioned for fitting the ear canal of a wearer, having a solid portion, a reversibly compressible portion, a channel and a sound attenuating element positioned inside the channel for attenuating sound being transmitted to the ear. In one embodiment, the ear tip piece is asymmetrical due to a bend.

Abstract: An ear piece for providing audio (e.g., from an electronic device) to the user is provided. The ear piece may include a compliant element operative to be inserted in the user's ear such that the compliant element deforms to retain the ear piece in the user's ear. The compliant element may include a connector portion coupling the compliant element to the ear piece housing, and an outer portion folded over the ear piece housing. To improve the user's comfort, the parting lines and other manufacturing defects may be hidden from view and from touch (e.g., the parting lines are on the inner surface of the outer portion).

Abstract: An earplug cushion for an earphone comprises a central tube part with a sound outlet and a sound inlet fitting with the sound guide tube of the earphone, an outer shield part extending from the sound outlet to the sound inlet for being inserted into the canal, and a buffer part disposed at the tube part next to the sound outlet; according to special and effective design for the buffer part, when the earphone is worn with the earplug cushion, the buffer part becomes twisted and deformed to be adapted to the canal in different sizes snugly without clearances for decreasing oppression to the canal and enhancing quality of the listened sound.

Abstract: An ear plug has a body member, an insert member and a shaft member. The body member has a central bore and the insert member projects into the central bore. A portion of the shaft member is threaded into the insert member and a portion of the shaft member bears against a portion of the bore. Rotation of the shaft relative to the insert causes an enlarged portion of the shaft to bear against the bore of the body member which is flexible and forces the body member to flex outwardly and to bear against the user's ear canal forming a seal against entry of water into the user's ear.

Abstract: A deep insertion vented earpiece system is described including resilient earpieces shaped to a wearer's ear canal for a conformal fit. A receptacle is provided within the outer surface of each earpiece for releasably receiving an audio plug. The audio plugs include a miniature loudspeaker and a pair of external ribs for mating with a corresponding pair of grooves formed along the periphery of the receptacle. This rib and groove feature provides for a secure retention of the audio plugs while enabling a simple removal operation. Each earpiece includes an audio passage to conduct the audio signal from the loudspeaker and a vent passage to enable continuous venting of the wearer's ear to atmosphere.

Abstract: According to one embodiment, A microphone-earphone includes a speaker connected to an acoustic device configured to measure acoustic characteristics of a listener's external auditory canal, and configured to output an acoustic signal toward the listener's external auditory canal, a microphone device disposed outside the listener's external auditory canal, an acoustic tube including one end connected to the microphone device and the other end opening to the listener's external auditory canal, and a housing including an opening portion which accommodates the speaker and is so disposed as to guide sound, which is output from the speaker, to the listener's external auditory canal. An inside diameter of the acoustic tube is less than a diameter of the opening portion.

Abstract: Disclosed are foam compositions with enhanced sound attenuation characteristics for use in earpieces, for example, user-disposable foam members such as foam tips for sound control devices including sound transmission devices and earplugs in which a relationship between the size of the pores and the volume of the cells of the polymeric may be controlled.

Abstract: The method for reconstructing the three-dimensional shape of the surface (14) of at least a portion of an ear canal (18) and/or of a concha comprises—for each of a multitude of points (12) on said surface (14)—the step of using a chromatic coded distance measurement technique for determining a distance value (40) representative of a distance to said point (12); and further comprises the step of reconstructing said three-dimensional shape based on said multitude of distance values (40).

Abstract: The present invention relates hearing protection devices for the human ear. More particularly, embodiments of the invention provide hearing protection devices capable of tunable acoustic attenuation. The invention relates further to ear plugs comprising a fluid-containing balloon for occlusion of the ear canal, which are capable of being adjusted for example by modifying fluid composition and/or fluid pressure within the balloon to vary attenuation at different frequencies of the audible sound spectrum. Other embodiments provide an earplug with fixed attenuation comprising: a body of compressible/expandable-recovery material shaped and sized to fit in an ear canal; and at least one chamber disposed within the body and comprising a filler material chosen from at least one of water, aphrons, water with solid or gelatinous particles suspended, and oil with particles suspended.

Abstract: Methods and devices for sound isolation are provided. A sound isolation device includes an expandable element and an insertion element. The expandable element is operatively attached to the insertion element. The expandable element includes an expanding medium, where the pressure of the expanding medium is varied to vary a sound isolation across the expandable element.

Abstract: A flat earplug and flat earplug package assembly is provided and a method of forming a flat earplug. The flat earplug includes a flat, rectangular foam sheet having a first surface and second surface, and adapted to be rolled up upon itself to form a coiled earplug for insertion into a user's ear. An inner coil is compressed to form a rigid coil when rolled up upon itself and an outer coil expands after the coiled earplug is inserted into the user's ear. The flat earplug package assembly includes a tray container for retaining the foam sheet therein and a wrapping for enclosing the flat earplug and tray container therein.

Abstract: The present invention provides a hearing protector comprising two ear cups which are designed to cover the ears of the wearer of the hearing protector, and sealing rings (2) which are secured along the peripheries of the ear cups, the sealing rings each displaying at least one circumferential lamella (5, 6, 7), being manufactured from a resilient, possibly elastic material, and being formed to sealingly abut, around the wearer's ears, against the wearer's head, wherein the lamella (5,6, 7), at least along its edge regions located most proximal the wearer's head, display portions (13, 14, 15) which, in a direction towards the wearer, are arched from a central region (3) in the sealing ring (2) out towards its periphery (1).

Abstract: An auditory canal insert is to be produced which can be manufactured simply and cost-effectively and which is less susceptible to dirt, especially cerumen. To this end an auditory canal insert is proposed which has an at least essentially tubular inner section, an outer section lying at least in some area against a user's auditory canal wall when the device is being worn and a filter element, especially a cerumen-protection and/or attenuation element, in which the filter element is initially manufactured as a separate component and subsequently connected by an insert molding process in one piece with the inner section. For the filter element this thus enables a broad spectrum to be covered in respect of its acoustic and mechanical filter characteristics.

Abstract: A method and apparatus for objectively assessing acoustical performance of an in-ear device having a passageway extending there through use a dual microphone probe that removably engages the passageway. The acoustical performance of the in-ear device is performed with the in-ear device inserted into the ear canal of the user and a reference sound source. A clip holding the probe in an acoustic near field of the sound source permits real time calibration thereof. The method and apparatus allow on-site and in-situ measurement of a predicted personal attenuation rating of the device, a subject-fit re-insertion test, an acoustic seal test, a rating test, a stability and reliability test, as well as a protection test of the device with an assessment of a filtered predicted exposure level at the ear for a specific noise exposure level. The apparatus may be simply housed along with the sound source for in-field evaluation tests.

Abstract: Single-chamber coatings are provided. The single-chamber coating includes a first medium, a second medium, and a ridge structure. The first medium covers at least a first portion of the second medium so as to form a chamber. At least one material property of the first medium is different than the second medium. The first medium forms a first wall of the chamber. The first wall is configured to apply a restorative force upon deformation of the chamber. The ridge structure is along a second wall of the chamber and is configured to direct the second medium substantially parallel to a ridge structure plane when the chamber is deformed. The chamber forms at least a portion of a coating. The coating is configured to be attached to an object that is configured to be inserted into an orifice.

Abstract: Multi-chamber coatings are provided. The multi-chamber coating includes a first medium and a second medium. The first medium covers at least a first portion of the second medium so as to form first and second chambers. At least one material property of the first medium is different than the second medium. The first chamber and the second chamber share a wall. The wall is configured to apply a restorative force upon deformation of the first or second chambers. The coating is configured to be attached to an object that is configured to be inserted into an orifice.

Abstract: In the case of a receiver facility to be fixed in the auditory canal, particularly for hearing devices with an external receiver, the receiver is to be mounted in the earmold in an acoustically advantageous fashion which guards against contaminations and is also easily exchangeable. Provision is thus made for a receiver facility with a longish receiver and a earmold, which has a borehole, into which the receiver is inserted. A tubular connector, which is more elastic than the receiver and the earmold, is used to accommodate for the most part the longitudinal extension of the receiver in a friction-locking fashion. The connector is for its part force-fitted into a borehole of the earmold in a friction-locking fashion. The receiver is thus elastically mounted and can be easily removed from the earmold together with the connector with the aid of a pin-like tool for replacement purposes.

Abstract: An improved ear tip for earphones and hearing protection is provided where comfort and occlusion of the ear are of most importance. The ear tip comprises an elastomer polymer resin material molded to form the material to the shape of the ear canal. A chamber is defined having a proximal and distal end, the distal end engages the acoustic exit of the transducer, sound source or sound attenuator and the proximal end of the bore is adapted to be disposed adjacent an eardrum. The inner body attaches to a nozzle, or audio playback orifice to naturally transition the acoustics from the transducer or sound attenuator to the eardrum via the ear canal. The ear tip can have a plurality of flexible annular flanges disposed at spaced intervals of the body with decreasing circumference as the flanges transition to the proximal end. Each flange tapers in a radius or curvilinear geometry as it progresses to the end of the object.

Abstract: An integrated eartip (501) that utilizes a one-piece, rather than a multi-piece, design is provided. The one-piece design is comprised of a first portion that includes at least one, or at least two, sound delivery tubes (513/515) and a second portion that is comprised of a compressible region. The integrated eartip also includes means for releasably attaching the eartip to an earphone in general, and a coupling member (503) in particular, thus allowing the eartip to be replaced as desired. When attached, the sound delivery tube, or tubes, of the integrated eartip are aligned with the acoustic port, or ports, of the earphone/coupling member. The first and second portions of the integrated eartip may exhibit different rigidity and/or compressibility characteristics. The integrated eartip can be fabricated from a single material such as a natural or synthetic elastomer.

Abstract: The present embodiment represents a dynamic Multi-Functional Dual Filtered Hearing Protector that will allow the wearer to hear intelligible speech or warning sounds, while the wearer is present in an environment surrounded by loud noise or impact sounds. The automatic attenuation provided by this hearing protector will increase, as the sound pressure levels increase, thus requiring no human intervention. This hearing protector is especially useful in situations where sounds may be produced from unexpected spikes in sound intensity, while still enabling the wearer to hear warning buzzers, or approaching vehicles without compromising safety. By not requiring human adjustment the wearer will be protected from such sounds. In addition to being able to be connected to acoustic transducers, the invention also relates to a custom hearing protector incorporating features of the embodiment, and a method for manufacturing such a custom hearing protector.

Abstract: Methods, tools, and methods of manufacturing said tools are provided for inserting a hearing device deeply into the ear canal of a user and adjusting its medial-lateral position therein. The provided tools comprise a shaft. A distal end of the shaft can be coupled to the hearing device. The shaft is flexible to facilitate its insertion into the tortuous ear canal and minimize injurious contact with the ear canal. The length of the shaft can be adjusted to adjust the depth of insertion of the shaft into the ear canal, customizing the tool for an individual user. Medial advancement of the shaft into the ear canal is limited by a base, side extension, or mold coupled to a proximal portion of the shaft or other proximal part of the tool.

Abstract: A tip for use in a hearing assistance device has multiple sound ports and is dimensioned for placement in the ear canal of a user. The tip includes a channel portion for conducting acoustic energy which includes a proximal end, a distal end, and a central channel that extends between the proximal end and distal end. The tip further includes a tip portion having at least two sound ports in direct communication with the central channel of the channel portion to receive the acoustic energy therefrom. Each of the sound ports conducts acoustic energy from the central channel of the channel portion into the ear canal of the user.

Abstract: A two piece dual mode earplug including an integrally molded elongated member having a nose end and an open rear end and a channel extending through. An integrally molded insert member is formed with a base portion and a rod portion and with the rod portion seated within the open rear end of the elongated member and includes an attenuation filter integrally molded as part of the rod portion and includes first and second openings located on each side of a chamber and with the size and length of the openings together with the chamber providing attenuation of impulse noise. The insert member also includes the base portion integrally molded to have a third opening larger than the first and second openings in the rod portion and with the first, second and third openings together forming a passageway through the insert member to the channel extending through the elongated member.

Abstract: An apparatus for providing hearing protection to a wearer includes an incorporated set of eyewear having an eyewear frame. In one version, a pair of ear muffler tubes are coupled to the supporting members of the frame or made integral therewith, the muffler tubes each extending to the entrance of the ear canal of a person to reduce the level of ambient noise in the ear canal and includes at least one muffler tube of appropriate dimensions sufficient to isolate the ear canal from ambient air that substantially reduces the acoustic impedance at the entrance of the ear canal over a wide range of audible sound frequencies. A connecting tube for attachment to the ear canal is coupled to the ear muffler tube.

Abstract: An in-ear canal earphone includes a torus-shaped cushioning member defining an aperture therethrough. An audio housing is connected to the cushioning member such that the cushioning member is movable between a first position, in which the housing extends generally away from the cushioning member, and a second position, in which a portion of the housing extends through the aperture for insertion into an ear canal.

Abstract: The invention provides a device and method for inserting a deep-in-the-ear-canal (DIC) hearing aid into the ear canal. The method may be performed by a DIC hearing aid user self-inserting the hearing aid or by a second person assisting the user. Embodiments of a DIC hearing aid insertion device include a base configured to fit into the conchal cavity of an ear, a chimney configured to fit into the ear canal projecting distally from the base and having a channel sized for a DIC hearing aid, and a piston. The piston is supported by a support structure such that the piston's longitudinal axis is collinear with the channel and the piston is moveable into the channel. A method of using the insertion device includes seating the DIC hearing aid in the insertion device, positioning the base of the insertion conformably within the conchal bowl of the ear, and inserting the hearing aid deep into the ear canal.

Abstract: A light weight and comfortable ear mount for a personal audio-set is disclosed. The ear mount conforms with the antihelix of a wearer's ear, thereby operating substantially as a compression spring between the wearer's antihelix and tragus, to operably secure the personal audio-set in place. In a preferred embodiment, the ear-mount is substantially kidney-shaped and includes an opening to prevent the total occlusion of the ear canal by the personal audio-set. Alternatively, the ear-mount includes a loop of material sized to operably engage the antihelix of the wearer's ear. The ear-mount is preferably reversible to allow it to be placed in either the wearer's left or right ear.

Abstract: An eartip made of a resilient body with an eartip core inside the open center of the body, and a tether attached to the eartip core at an attachment region along the length of the core. A free end of the tether extends outward from the eartip, allowing a wearer to remove the eartip from their ear by pulling on the tether.

Abstract: The present invention pertains to an ear-mountable, paraboloid-shaped reflective acoustic lens which can be used to enhance a user's perception of the sounds from a source the user faces. The lens mechanically collects and naturally amplifies the airborne acoustic information from the sound source. The lens uses both the wearer's external ear as well as the interior face of an acoustic lens to coherently reflect increased amounts of sound from the source into the ear canal of a user who wears the lightweight, deformable lens. All sections of the lens meet the head of the user at an obtuse angle. The lens is held in place around the user's ear by the inward pressure of the lens pushing against the outside of the user's pinna. Adherence of the device to the ear of the wearer can be increased by an adhesive strip on the interior face of the lens.

Abstract: A self-conforming sound attenuation earplug for location in an ear canal. The earplug includes a stem. At least one support is joined with the stem and located between the stem ear end and the stem user end, and extends radially outward from the stem. A shell is made of a deformable-resilient shell material and has a tapered exterior that increases in circumference when moving from the stem ear end to the stem user end. The shell engages at least a portion of the support and engages at least a portion of the stem located between the stem ear end and the stem user end. At least a portion of the support is free from contact with the shell and the support material is a different type of material than the shell material.

Abstract: Various earbud embodiments comprise a sleeve portion, a base portion, a bell portion, and reinforcement members. The sleeve portion defines a central void extending from a proximal end to a distal end of the earbud. The base portion encircles the sleeve portion. The bell portion connects the sleeve portion to the base portion. The bell portion defines at least one aperture, and includes at least one web portion connected to the base portion at a connection point. At least one reinforcement member at each connection point extends from the base portion to the web portion to strengthen the structure at the connection point.

Abstract: An earphone projects sound into an ear having an acoustic meatus, a tragus, an intertragic notch, an anti-tragus and a canal. The earphone includes a base that is positioned proximate an outer surface of the tragus and anti-tragus when the earphone is mounted to the ear. A speaker housing at least partially contacts the acoustic meatus of the ear and includes a speaker cover positioned proximate the canal when the earphone is mounted to the ear. First and second tragus lobes extend from the base generally toward the speaker housing. The first and second tragus lobes are spaced from and positioned on generally opposite lateral sides of the speaker housing. The anti-tragus being held between the first tragus lobe and the base when the earphone is mounted to the ear and the tragus being held between the second tragus lobe and the base when the earphone is mounted to the ear.

Abstract: A semi-insert hearing protector includes a thin-walled enclosure sized substantially to that of the outer ear of a wearer, the enclosure being made from a rigid or semi-rigid material and secured to the head of said wearer by means of an adjustable headband. A short tube extends from the enclosure for communication with the ear canal, the short tube being made from a rigid or semi-rigid material and including a flexible cuff disposed over the tube made from a resilient material. The enclosure contains sound absorbing material configured to vary the frequency characteristic of sound attenuation by the semi-insert.

Abstract: A vent having a reduced cross-section or taper permits the fabrication of very small hearing instruments while providing the necessary openings for the receiver tube and the vent in the tip of the instrument. The reduced cross-section provides sufficient clearance for the full cross-section of the receiver tube, without sacrificing the performance of the vent. The modified vent may be created in a CAD environment using Boolean modeling operations.