In-ear audio output device with stability band designed to minimize acoustic port blockage

Abstract

The embodiment describes an in-ear audio output device that includes an acoustic chamber defined by an earbud housing shaped to fit into the inferior concha of an ear of a wearer of the in-ear audio output device, the earbud housing creating an opening in a wall of the earbud housing, the acoustic chamber including a resistance port located on a first side of the earbud housing, a first feedforward microphone located on a second side of the earbud housing, the second side being substantially opposite the first side of the earbud housing, and a stability band. The stability band includes at least one attachment feature that couples the stability band to the earbud housing, and a first side substantially opposite the attachment feature that only partially covers the resistance port when the in-ear audio output device is positioned in the wearer's ear.

Description

[Technical Field]

[0001] Aspects of the present disclosure describe various features of an in-ear audio output device having a stability band and one or more acoustic ports. As described in more detail herein, the stability band is designed to hold the in-ear audio output device firmly in place and ensure that the one or more acoustic ports are not completely blocked. [Background technology]

[0002] Various in-ear audio output devices (referred to herein as "audio devices") incorporate active noise reduction (ANR) features, also known as active noise control or cancellation (ANC), in which one or more microphones detect sounds, such as external sounds captured by a feedforward microphone or internal sounds captured by a feedback microphone. Signals from the feedforward and / or feedback microphones are processed to provide anti-noise signals that are sent to acoustic transducers (e.g., speakers, drivers) to cancel noise that would otherwise be heard by the user.

[0003] Such audio devices may also have small vents, or acoustic ports, on the exterior surface of the housing. These acoustic ports can be used to improve the audio device's acoustic output, uniform the audio response, and provide an airway during acoustic transducer overpressure events. As audio devices decrease in size, the potential for interference with such ports continues to increase. Summary of the Invention [Means for solving the problem]

[0004] An aspect provides an in-ear audio output device. In one aspect, the in-ear audio output device includes an acoustic chamber defined by an earbud housing shaped to fit over the inferior concha of the ear of a wearer of the in-ear audio output device, the earbud housing creating an opening in a wall of the housing to couple the acoustic chamber with a space outside the earbud housing, a resistive port located on a first side of the earbud housing, and a first feedforward microphone located on a second side of the earbud housing, the second side being substantially opposite the first side of the earbud housing. a stability band comprising: an acoustic chamber comprising a feedforward microphone of; and a stability band comprising at least one attachment feature including an opening aligned with the resistance port for coupling the stability band to the earbud housing and coupling the acoustic chamber to a space outside the stability band; and a first side substantially opposite the attachment feature that only partially covers the resistance port when the in-ear audio output device is positioned within the wearer's ear and the first side of the stability band is folded under the antitragus of the wearer's ear and toward the attachment feature.

[0005] In aspects, the in-ear audio output device further comprises a nozzle coupled to an outer surface of the earbud housing, extending toward an ear canal of the wearer's ear and having a flat distal end, the nozzle including an acoustic passageway for conducting sound waves to the wearer's ear canal, and a substantially spherical dome-shaped sealing structure extending from the flat distal end of the nozzle.

[0006] In an aspect, a second side of the earbud housing including a feedforward microphone that is substantially opposite the first side of the earbud housing including the resistance port comprises a second side of the earbud housing including a first feedforward microphone that is longitudinally opposite the first side of the earbud housing that includes the resistance port such that the first feedforward microphone sits in the concha cavity of the wearer's ear and the resistance port sits in the concha cavity of the wearer's ear and is aligned with the intertragal notch of the wearer's ear.

[0007] In an embodiment, the resistance port is covered with a material that provides acoustic resistance.

[0008] In embodiments, the resistance port comprises a stadium shape having a maximum length of about 1 millimeter to about 3 millimeters.

[0009] In embodiments, at least one attachment feature of the stability band is shaped to straddle the periphery of the earbud housing.

[0010] In an embodiment, the opening tapers from a first side of the earbud housing's distal attachment feature to a second side of the earbud housing's proximal attachment feature, such that at the first side of the attachment feature, the opening includes a first maximum length that is greater than the maximum length of the resistance port and a first maximum height that is greater than the maximum height of the resistance port, and at the second side of the attachment feature, the opening includes a second maximum length that is equal to the maximum length of the resistance port and a second maximum height that is equal to the maximum length of the resistance port. In an embodiment, the first maximum length is between about 2 millimeters and about 4 millimeters, and the second maximum length is between about 1 millimeter and about 3 millimeters.

[0011] In aspects, the stability band further comprises a first cantilevered portion shaped to flexibly fit under the antihelix of the wearer's ear and a second cantilevered portion shaped to flexibly fit under the antitragus, the second cantilevered portion comprising a second side of the stability band coupled to the attachment feature and a first side of the stability band substantially opposite the second side of the stability band. In aspects, the second cantilevered portion includes at least one of a horizontal rib or a vertical rib.

[0012] In aspects, the height of the first side of the stability band decreases along the length of the first side of the stability band such that the resistance port is not blocked by the first side of the stability band when the in-ear audio output device is positioned within the wearer's ear and the first side is folded below the antitragus and toward the attachment feature.

[0013] In embodiments, the reduction in height of the first side of the stability band varies such that the reduction in height of the first side of the stability band increases along the length of the first side of the stability band.

[0014] In aspects, the stability band is detachable from the in-ear audio output device.

[0015] In aspects, the in-ear audio output device further comprises a mass port located on a second side of the earbud housing, the mass port being in the same plane as the first feedforward microphone.

[0016] In aspects, the in-ear audio output device further comprises a body coupled to an outer surface of the earbud housing that extends away from the ear canal of the wearer's ear, and a second feedforward microphone located on the body, the second feedforward microphone being proximate the concha of the wearer's ear and longitudinally opposite the first side of the earbud housing that includes the resistance port, such that the second feedforward microphone is proximate the concha cavity (234) of the wearer's ear and aligned with the intertragal notch of the wearer's ear. In aspects, the second feedforward microphone is outside the ear when the in-ear audio output device is positioned within the wearer's ear.

[0017] Aspects provide a stability band for an in-ear audio output device. In one aspect, the stability band for an in-ear audio output device comprises at least one attachment feature coupling the stability band to an earbud housing of the in-ear audio output device, the at least one attachment feature including an opening aligned with the intertragic notch, and a first side substantially opposite the attachment feature, the first side having a height that decreases along a length of the first side.

[0018] In aspects, the at least one attachment feature is shaped to straddle a periphery of an earbud housing of the in-ear audio output device.

[0019] In an aspect, the opening tapers from a first side of the mounting feature to a second side of the mounting feature, such that at the first side of the mounting feature, the opening includes a first maximum length and a first maximum height, and at the second side of the mounting feature, the opening includes a second maximum length and a second maximum height, the first maximum length being greater than the second maximum length and the first maximum height being greater than the second maximum height. In an aspect, the first maximum length is between about 2 millimeters and about 4 millimeters, and the second maximum length is between about 1 millimeter and about 3 millimeters.

[0020] In aspects, a stability band for an in-ear audio output device further comprises: a first cantilevered portion shaped to flexibly fit under the antihelix of an ear of a wearer of the in-ear audio output device; and a second cantilevered portion shaped to flexibly fit under the antitragus of the ear of the wearer, the second cantilevered portion comprising a second side coupled to the attachment feature and a first side substantially opposite the second side. In aspects, the second cantilevered portion includes at least one of a horizontal rib or a vertical rib.

[0021] In embodiments, the reduction in height of the first side varies such that the reduction in height of the first side increases along the length of the first side.

[0022] All examples and features mentioned in this specification can be combined in any technically possible manner. Other features, objects, and advantages will become apparent from the following detailed description when read in conjunction with the following drawings. [Brief explanation of the drawings]

[0023] [Figure 1A] FIG. 1 is a diagram of the lateral surface of a human ear. [Figure 1B] 1 is an exemplary cross section of a human ear. [Figure 1C] 1 is an exemplary cross section of a human ear. [Figure 2] FIG. 1 is a side perspective view of an in-ear audio output device including an earbud housing having an acoustic port, according to an aspect of the present disclosure. [Figure 3] FIG. 10 is a front perspective view of an acoustic port of an earbud housing according to aspects of the present disclosure. [Figure 4] FIG. 1 is a side perspective view of an in-ear audio output device including an earbud housing with an acoustic port and a stability band according to an aspect of the present disclosure. [Figure 5] FIG. 1 is a bottom perspective view of an in-ear audio output device including an earbud housing with an acoustic port and a stability band according to an aspect of the present disclosure. [Figure 6] FIG. 1 illustrates a rear perspective view of an in-ear audio output device including an earbud housing with an acoustic port and a stability band according to an aspect of the present disclosure. [Figure 7] FIG. 1 is a side perspective view of an in-ear audio output device including an earbud housing with an acoustic port and a stability band according to an aspect of the present disclosure. [Figure 8A] FIG. 1 illustrates a rear perspective view of an in-ear audio output device including an earbud housing with an acoustic port and a stability band according to an aspect of the present disclosure. [Figure 8B] FIG. 1 illustrates a rear perspective view of an in-ear audio output device including an earbud housing with an acoustic port and a stability band according to an aspect of the present disclosure. [Figure 9] FIG. 1 is a rear perspective view of an in-ear audio output device including an earbud housing having an acoustic port and a stability band positioned within a wearer's ear, according to an aspect of the present disclosure. [Figure 10] FIG. 1 illustrates a front view of an exemplary stability band, according to aspects of the present disclosure. [Figure 11] FIG. 1 illustrates a side view of an exemplary stability band, according to aspects of the present disclosure. [Figure 12A] 10A-10C are side perspective views of different stability band designs according to aspects of the present disclosure. [Figure 12B] 10A-10C are side perspective views of different stability band designs according to aspects of the present disclosure. [Figure 12C] 10A-10C are side perspective views of different stability band designs according to aspects of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0024] In-ear audio output devices use drivers (e.g., acoustic transducers, speakers) to convert electrical signals into sound. One basic type of driver includes a coiled wire, called a voice coil, attached to the top of a cone- or dome-shaped diaphragm. The voice coil is positioned within a permanent magnetic field, created, for example, by a pair of permanent magnets. An electric current is passed through the voice coil, turning it into an electromagnet. The force generated by the magnetic fields of the electromagnet and the permanent magnet causes the voice coil to move back and forth, which in turn moves the diaphragm. The movement of the diaphragm creates longitudinal pressure waves in the air, which are perceived as sound by our ears and brain.

[0025] The resulting sound quality is highly dependent on the driver's design, and more specifically, its ability to move air. Generally, the easier the driver can move forward and backward, the more air it can move. This is especially important at lower frequencies (perceived as bass), which require more extreme driver movement.

[0026] To allow for easier speaker movement, audio devices are designed with small vents or "acoustic ports" on the exterior of the housing that connect the acoustic chamber (containing the driver) to the area outside the device. The acoustic ports allow air to move behind the driver when the driver pushes air toward the ear, and allow air to move in the opposite direction when the driver moves away from the ear. By allowing for easier speaker movement, the ports improve sound quality. Furthermore, by allowing air to flow in and out of the driver, the acoustic ports help prevent pressure buildup, thereby allowing for freer driver movement. Additionally, the acoustic ports help to uniform the audio response.

[0027] Due to the small size of the ports and the size limitations of wearable audio output devices, the ports are easily subject to occlusion. For example, given the geometry of a wearer's ear, when the audio device is placed in the wearer's ear, one or more of the acoustic ports may become blocked, thereby preventing air from flowing in and out of the acoustic chamber. As another example, additional features added to modern in-ear audio output devices to increase stability and comfort may, in some cases, be positioned to cover the existing acoustic ports of the audio device.

[0028] When one or more of the acoustic ports become blocked, the acoustic response of the audio device may deviate significantly from what is expected. The audio device may not be designed to compensate for such deviations, and therefore, blocked acoustic ports may create instability and, in some cases, may result in feedback-like squealing sounds.

[0029] As audio devices decrease in size, the likelihood of interference with such acoustic ports by the audio device wearer's body continues to increase. Furthermore, the addition of physical features to ensure that the audio device remains stable and comfortable for the wearer is also likely to result in blockage of the acoustic ports. Therefore, it is desirable to design an in-ear audio device that rests comfortably on the wearer's ear, while also preventing complete air blockage of the device's acoustic ports.

[0030] Accordingly, aspects of the present disclosure provide an in-ear audio output device having stability bands designed to minimize blockage of the acoustic ports. The described stability bands are designed to ensure that one or more acoustic ports of the audio device are not completely blocked (e.g., that there is no leakage path from inside the earbud housing of the audio device that defines the acoustic chamber to the space outside the earbud housing) for a variety of ear geometries and sizes. As explained below with respect to Figures 1A and 1B, the exact geometry of the human ear varies greatly from person to person.

[0031] Specifically, the stability band includes an attachment feature that couples or otherwise attaches the stability band to an earbud housing of an audio device having an acoustic port. The acoustic port creates an opening in a wall of the earbud housing to couple an acoustic chamber (e.g., defined by the earbud housing) with a space outside the earbud housing. In aspects, the attachment feature includes an opening aligned with the acoustic port of the earbud housing to couple the acoustic chamber of the audio device with a space outside the stability band. Furthermore, in aspects, a first side of the stability band substantially opposite the attachment feature is sloped so that when the sloped side is folded toward the acoustic port by positioning the audio device within the wearer's ear, the acoustic port is not completely blocked by the sloped side. In other words, the sloped side of the stability band is designed to provide space between the acoustic port and the wearer's ear while also preventing the acoustic port from being completely blocked, thereby allowing air to flow in and out of the acoustic chamber.

[0032] In aspects, the stability band further includes a first cantilevered portion shaped to flexibly fit under the antihelix of the wearer's ear when the earpiece is worn, and a second cantilevered portion shaped to flexibly fit under the antitragus of the wearer's ear when the earpiece is worn. The second cantilevered portion includes a first angled side of the stability band that is substantially opposite the attachment feature. In aspects, the cantilevered portion of the stability band described herein provides orientation and stability without excessive radial pressure. The orientation helps ensure that the audio device is properly seated within the wearer's ear. Achieving stability refers to the earpiece remaining in the wearer's ear with minimal movement when properly inserted. Thus, the described stability bands allow the audio device to accommodate more electronic components in the area around the wearer's concha and help it sit comfortably in the wearer's ear for extended periods of time while the wearer engages in various activities.

[0033] In aspects, the audio device incorporates an active noise control or cancellation (ANC) feature in which a feedforward microphone detects external sound and then processes it to provide an anti-noise signal that is sent to an acoustic transducer (e.g., speaker, driver) to cancel noise that would otherwise be heard by the user. The acoustic port of the earbud housing may be located on a first side of the earbud housing that is substantially opposite a second side of the earbud housing that has the feedforward microphone. In other words, to minimize any noise that the feedforward microphone may pick up from airflow into and out of the acoustic port, the acoustic port is located in the first acoustic cavity and the feedforward microphone is located in the second acoustic cavity when the audio device is placed at the wearer's ear. Thus, the location of the acoustic port is acoustically optimal for the location of the feedforward microphone.

[0034] The illustrated stability band and audio device are shown for the wearer's right ear. Stability bands and audio devices designed to fit over the wearer's left ear are mirror images of the stability bands and audio devices described below and operate according to the same principles.

[0035] FIG. 1A shows the lateral surface 100A of a human right ear with several features identified. There are many different ear sizes and geometries. Some ears have additional features not shown in FIG. 1A. Some ears lack some of the features shown in FIG. 1A. Some features may be more or less prominent than those shown in FIG. 1A.

[0036] In embodiments, as mentioned, the stability bands described herein include cantilever features, which may be referred to as scoops or flaps. In certain embodiments, the cantilever features include at least a first cantilever portion and a second cantilever portion based on the geometry of a typical ear. In certain embodiments, the cantilever features include only the second cantilever portion. The first cantilever portion fits under the antihelix of the wearer's ear in region 120 when the earpiece is worn. The second cantilever portion fits under the antitragus of the wearer's ear in region 110 when the earpiece is worn. In embodiments, the cantilever portions are integrally formed. The cantilever portions apply pressure to the ear along the antitragus and at least a small lower portion of the antihelix. As a result, the stability band creates stability and pushes the audio device toward the wearer's ear canal. Additionally, the stability band supports the earbud housing, which houses the electronics, along the recess of the wearer's concha in region 130.

[0037] In aspects, as mentioned, the earbud housing includes an acoustic port that creates an opening in a wall of the earbud housing to couple an acoustic chamber (e.g., defined by the earbud housing) with a space outside the earbud housing. In aspects, the acoustic port is a resistive port. Although embodiments herein are described with respect to a resistive port, the acoustic port can be any type of port that creates an opening in the earbud housing.

[0038] The earbud housing also includes a first feedforward microphone. In embodiments, the first feedforward microphone is longitudinally opposite the resistive port. Specifically, the first feedforward microphone sits in the navicular cavity of the wearer's concha in region 132, while the resistive port sits in the cavity of the wearer's concha in region 134. As mentioned, the facing placement of the feedforward microphone and resistive port on the earbud housing helps minimize noise that the feedforward microphone may pick up from airflow into and out of the acoustic port for better ANC.

[0039] Additionally, in embodiments, the resistance port is also aligned with the wearer's intertragic notch in region 140 when seated in the wearer's concha cavity in region 134. The intertragic notch forms a notch in the auricular cartilage (e.g., region 140) and separates the antitragus from the ear lobe and antitragus. Therefore, it is ideal for the resistance port to be aligned with the wearer's intertragic notch, given that the depression of the intertragic notch allows for little or no skin that can displace the stability band toward the resistance port, further reducing the likelihood of completely blocking the resistance port.

[0040] 1B and 1C are exemplary cross-sections 100B and 100C of a human ear, respectively, with several features identified. The ear canal is an irregularly shaped cylinder with a varying cross-sectional area and a non-linear centerline. Among the features identified are the entrance to the ear canal and the main portion of the ear canal. As used herein, the entrance to the ear canal refers to the portion of the ear canal near the concha where the walls of the ear canal are substantially non-parallel to the centerline of the ear canal. The exact anatomy of the human ear varies greatly from person to person. For example, in the cross-section of FIG. 1B, there is a relatively abrupt transition from ear canal walls that are non-parallel to the centerline of the ear canal 30-1B to walls that are substantially parallel to the centerline of the ear canal, and therefore the entrance to the ear canal 32-1B is relatively short. In the cross section of FIG. 1C, there is a more gradual transition from walls that are not parallel to the centerline of the ear canal to walls that are substantially parallel to the centerline 30-1C of the ear canal, and therefore the entrance 32-1C to the ear canal is relatively long.

[0041] FIG. 2 is a side perspective view 200 of an in-ear audio output device including an earbud housing with an acoustic port including at least one resistive port. The in-ear audio output device (referred to herein as an "audio device") includes a body 202, an earbud housing 204, a nozzle 206 (not illustrated in FIG. 2), and a sealing structure 208. In embodiments, the earbud housing 204 is shaped to fit into and around the inferior concha of a wearer of the audio device. The earbud housing 204 defines an acoustic chamber that houses an acoustic driver and other electronic components for the audio device. In embodiments, the earbud housing 204 includes a resistive port 210 located on a first side of the earbud housing 204 that creates an opening in a wall of the earbud housing 204 to couple the acoustic chamber with the space outside the earbud housing 204. The resistive port 210 is described in more detail with respect to FIG. 3.

[0042] In embodiments, earbud housing 204 further includes a feedforward microphone 214 (referred to herein as “first feedforward microphone 214”) located on a second side of earbud housing 204. The second side of earbud housing 204 including first feedforward microphone 214 is substantially opposite the first side of earbud housing 204 including resistance port 210. In embodiments, the second side of earbud housing 204 including first feedforward microphone 214 is longitudinally opposite the first side of earbud housing 204 including resistance port 210 such that first feedforward microphone 214 sits in the navicular cavity of the wearer's concha and resistance port 210 sits in the cavity of the wearer's concha and is aligned with the wearer's intertragal notch.

[0043] The body 202 is coupled to an outer surface of the earbud housing 204, which extends away from the ear canal of the wearer's ear. In embodiments, the body 202 is shaped like a rectangular pill and sits outside the wearer's ear when the audio device is worn. In embodiments, the body 202 sits against the outside of the wearer's ear, and in some cases, against the wearer's face, to help hold the audio device in place in the ear. Although not illustrated in FIG. 2 , the body 202 may include a feedforward microphone 226 (referred to herein as the “second feedforward microphone 226”). The second feedforward microphone 226 located on the body 202 may be longitudinally opposite the first side of the earbud housing 204 that includes the resistance port 210, such that the second feedforward microphone 226 is near the wearer's concha and the resistance port 210 sits in the concha cavity of the wearer. The second feedforward microphone is illustrated in more detail in FIG. 4 .

[0044] Nozzle 206 extends from earbud housing 204 toward sealing structure 208. In embodiments, earbud housing 204 extends into, or forms a portion of, nozzle 206. Nozzle 206 includes an acoustic passageway for sound waves to pass into the wearer's ear canal. In embodiments, nozzle 206 has a flat end with a substantially oval-shaped opening. The major axis of the substantially oval-shaped opening is substantially aligned with the major axis of the wearer's ear canal (see FIGS. 1B and 1C ) when the audio device is placed in the wearer's ear. In certain other embodiments, the opening is oval-shaped or racetrack-shaped.

[0045] The sealing structure 208 creates a seal with a typical wearer's ear canal. The sealing structure 208 is substantially spherical and dome-shaped. The sealing structure 208 extends from the flat end of the nozzle 206 and folds back toward the wearer's outer ear. The sealing structure 208 includes a narrow end coupled to the nozzle 206 and a wide end that is wider than the width of a typical outer ear. There may be a soft, rounded connection between the narrow end of the sealing structure 208 and the wide end of the sealing structure 208. In one example, the connection between the narrow end and the wide end is described as pillow-shaped, dome-shaped, soft, and / or slightly curved. This type of connection reduces pressure on the wearer's ear canal and reduces the force vector that pushes the audio device out of the wearer's ear canal.

[0046] In an embodiment, earbud housing 204 includes mass port 212. The provision of one or both of mass port 212 and resistance port 210 enhances the characteristics of the acoustic output of sound by the acoustic driver. In an embodiment, mass port 212 is located on a second side of earbud housing 204, with the mass port being coplanar with the first feedforward microphone. As noted, the second side of earbud housing 204, including mass port 212 and first feedforward microphone 214, is substantially opposite the first side of earbud housing 204, including resistance port 210.

[0047] FIG. 3 is a front perspective view 300 of a resistance port 210 of an earbud housing 204 according to an embodiment of the present disclosure. As illustrated in FIG. 3, the resistance port 210 is essentially a hole in the earbud housing 204, thereby allowing air to flow in and out of the acoustic chamber defined by the earbud housing 204. As illustrated in FIG. 3, in certain embodiments, the resistance port 210 may include a stadium shape (e.g., a rectangle with semicircles on one opposing side). However, in other embodiments, the resistance port 210 may be substantially oval, substantially circular, substantially rectangular, etc. In embodiments, the resistance port 210 may have a maximum length of about 1 millimeter (mm) to about 3 mm. The size of the resistance port 210 may be dimensioned to allow air to pass in and out of the acoustic chamber while preventing large particles and / or materials from entering the acoustic chamber.

[0048] In embodiments, resistive port 210 is covered (fully or partially) by resistive mesh 240. In some embodiments, resistive mesh 240 is a material that provides acoustic resistance. For example, resistive mesh 240 can be a wire or fabric screen that allows some air and acoustic energy to pass through resistive port 210. In some embodiments, resistive mesh 240 is a waterproof, sweatproof, and / or dustproof screen.

[0049] In embodiments, the audio device may include a stability band. FIG. 4 is a side perspective view 400 of an audio device including an earbud housing with an acoustic port including at least a resistive port (not shown) and a stability band according to an embodiment of the present disclosure. FIG. 5 is a side perspective view 500 of an audio device including an earbud housing with an acoustic port including at least one resistive port and a stability band according to an embodiment of the present disclosure. FIG. 6 is a side perspective view 600 of an audio device including an earbud housing with an acoustic port including at least one resistive port and a stability band according to an embodiment of the present disclosure. FIG. 7 is a side perspective view 700 of an audio device including an earbud housing with an acoustic port including at least one resistive port and a stability band according to an embodiment of the present disclosure. FIGS. 8A and 8B are rear perspective views 800A and 800B, respectively, of an audio device including an earbud housing with an acoustic port and a stability band according to an embodiment of the present disclosure.

[0050] 4, 5, 6, and 7, stability band 216 may include attachment features 218 that are used to attach stability band 216 to an audio device, and more specifically, to earbud housing 204. In aspects, stability band 216 is removably attached to earbud housing 204. In other words, attachment features 218 allow for the removal and addition of stability band 216 to the audio device. In other aspects, attachment features 218 are integrally formed with earbud housing 204.

[0051] 4, 5, 6, and 7, the attachment feature 218 is shaped to span the periphery of the earbud housing 204 of the audio device. Specifically, the attachment feature 218 may be a sleeve that fits around the periphery of the earbud housing 204. However, in other embodiments not illustrated, the attachment feature 218 is any feature that couples the stability band 216 to the earbud housing 204. In other words, the attachment feature 218 need not span the periphery of the earbud housing 204. As one example, the attachment feature 218 may snap onto or slide into the periphery of a portion of the earbud housing 204 to connect the stability band 216 to the earbud housing 204.

[0052] In embodiments, the attachment feature 218 includes an opening 224 that aligns with the resistance port 210 of the earbud housing 204 when the stability band 216 is coupled to the earbud housing 204. Specifically, the opening 224 provides a hole in the stability band 216 that is used to couple the acoustic chamber with the space outside the stability band 216 when the stability band 216 is coupled to the earbud housing 204. In embodiments, the opening 224 tapers from a first side of the distal attachment feature 218 of the earbud housing 204 to a second side of the proximal attachment feature 218 of the earbud housing 204. In other words, tapering the opening 224 causes the opening 224 to gradually narrow toward the second side of the proximal attachment feature 218 of the earbud housing 204. In aspects, opening 224 on a first side of attachment feature 218 (e.g., distal to earbud housing 204) includes a first maximum length that is greater than the maximum length of resistance port 210 and a first maximum height that is greater than the maximum height of resistance port 210, while opening 224 on a second side of attachment feature 218 (e.g., proximal to earbud housing 204) includes a second maximum length that is equal to the maximum length of resistance port 210 and a second maximum height that is equal to the maximum length of resistance port 210. The first maximum length may be between about 2 mm and about 4 mm, and the second maximum length may be between about 1 mm and about 3 mm.

[0053] 5, 6, 7, 8A, and 8B, stability band 216 includes a first side that is substantially opposite attachment feature 218. The first side of stability band 216 is a free side that is distal to attachment feature 218 and earbud housing 204, at least when the earpiece is not inserted in a wearer's ear. In aspects, the first free side of stability band 216 is designed such that when the audio device is positioned within a wearer's ear and the first free side of stability band 216 is folded toward attachment feature 218, and more specifically, toward opening 224 of attachment feature 218 that is aligned with resistance port 210, the first free side of stability band 216 only partially covers resistance port 210. Specifically, in embodiments, the height of the first free side of the stability band 216 may decrease along the length of the first free side of the stability band 216 so that the resistance port 210 is not blocked by the first side of the stability band 216 when the audio device is positioned over the wearer's ear and the first free side is folded toward the attachment feature 218. In other words, the first free side may slope downward at different angles. In embodiments, the decrease in height of the first free side of the stability band 216 varies such that the decrease in height of the first free side of the stability band 216 increases along the length of the first free side of the stability band 216. The design of the first free side of the stability band 216 may be described in more detail with respect to FIGS. 12A-12C .

[0054] In an embodiment, a first free side substantially opposite attachment feature 218 is part of second cantilever portion 220 of stability band 216. Specifically, in an embodiment, stability band 216 includes first cantilever portion 220 shaped to flexibly fit under the antihelix of the wearer's ear and second cantilever portion 222 shaped to flexibly fit under the antitragus of the wearer's ear. In an embodiment, first cantilever portion 220 and second cantilever portion 222 are integrally formed.

[0055] Each of the first cantilevered portion 220 and the second cantilevered portion 222 includes at least a first free side that is further from the attachment feature 218 and the earbud housing 204 when the earpiece is not inserted in a wearer's ear. As described above, the first free side 222a of the second cantilevered portion 222 may have a height that decreases (e.g., slopes downward at a different angle) along the length of the first free side 222a of the second cantilevered portion 222. Thus, the first free side 222a of the second cantilevered portion 222 may only partially cover the resistance port 210 when the audio device is positioned in the wearer's ear and the first free side 222a of the second cantilevered portion 222 is folded under the wearer's antitragus toward the attachment feature 218, and more specifically, toward the opening 224 of the attachment feature 218 that is aligned with the resistance port 210.

[0056] Additionally, first cantilevered portion 220 and second cantilevered portion 222 each include a second side that is proximal to attachment feature 218 and earbud housing 204. The first free side (e.g., labeled 220a) and second side of first cantilevered portion 220 and the first free side (e.g., labeled 222a) and second side of second cantilevered portion 222 are shown in more detail in FIGS.

[0057] First cantilever portion 220 and second cantilever portion 222 have a scoop or curved shape so that when stability band 216 is attached to the audio device and the audio device is inserted into the wearer's ear, stability band 216 fits snugly to the shape of the wearer's antihelical region 120 and antitragus region 110, respectively. This curved shape allows a first free side of each cantilever portion (e.g., first free side 220 a and first free side 222 a) to gently roll up toward attachment feature 218 and earbud housing 204 when first cantilever portion 220 and second cantilever portion 222 contact the antihelix and antitragus, respectively. In this manner, stability band 216 secures the audio device for a wide range of ear geometries and sizes. If the wearer has large ears, the less free side of the cantilevered portion may curl up toward the attachment features 218 and earbud housing 204 when the audio device is inserted into the ear with the stability band 216. If the user has smaller ears, the more free side of the cantilevered portion may curl up toward the attachment features 218 and earbud housing 204 when the audio device is inserted into the ear with the stability band 216. In either case, however, the same stability band 216 comfortably provides stability to keep the audio device in place and properly oriented, and provides slight resistance when the wearer removes the audio device by pulling it away from the ear canal.

[0058] 9 is a rear perspective view 900 of an audio device including an earbud housing having an acoustic port including at least one resistance port and a stability band positioned within a wearer's ear, according to an embodiment of the present disclosure. As illustrated in FIG. 9, when the audio device is inserted into the wearer's ear, the resistance port 210 of the stability band 216, and similarly the opening 224, aligns with the intertragic notch of the ear of the wearer of the audio device. As mentioned, it is ideal for the resistance port 210 (opening 224) to align with the wearer's intertragic notch when the audio device is placed in the wearer's ear, given that the intertragic notch allows for little or no skin that could displace the stability band toward the resistance port, further reducing the chance of blocking the resistance port.

[0059] 9, a small portion of first cantilevered portion 220 and a small portion of second cantilevered portion 222 are visible from a rear perspective view when the audio device is inserted into a wearer's ear. First cantilevered portion 220 is shaped to flexibly fit under the antihelix of the wearer's ear such that when first cantilevered portion 220 contacts the wearer's antihelix, first free side 220a of first cantilevered portion 220 gently rolls up towards attachment feature 218 (e.g., attachment feature is not illustrated in FIG. 8 because this feature is not visible when the audio device is placed in the wearer's ear). Similarly, second cantilever portion 222 is shaped to flexibly fit under the antitragus of the wearer's ear, such that when second cantilever portion 222 contacts the wearer's antitragus, first free side 222a of second cantilever portion 222 gently rolls up toward attachment feature 218, and more specifically, toward resistance port 210 in earbud housing 204 and opening 224 in stability band 216. When an audio device including stability band 216 is positioned within a wearer's ear, the outer ear obscures the remainder of first cantilever portion 220 and second cantilever portion 222, which are not shown in FIG.

[0060] In an embodiment, due to the geometry of a typical ear, first cantilever portion 220 and second cantilever portion 222 are primarily on different planes. When the audio device is worn, second cantilever portion 222 may sit deeper in the ear canal compared to first cantilever portion 220. In an embodiment, first side 222a of second cantilever portion 222 is primarily on a first plane that is closer to the ear canal compared to first side 220a of cantilever portion 220 when the first earpiece is worn.

[0061] Additionally, as shown in FIG. 9, the body 202, as well as the second feedforward microphone 226, may be located outside the wearer's ear when the audio device is positioned within the wearer's ear.

[0062] Figure 10 is a front view 1000 of an exemplary stability band according to an embodiment of the present disclosure. Figure 11 is a side view 1100 of an exemplary stability band according to an embodiment of the present disclosure.

[0063] As mentioned, each of the first cantilevered portion 220 and the second cantilevered portion 222 includes a first and second side. Specifically, as shown in FIG. 10 , when the first cantilevered portion 220 including the stability band is inserted into the wearer's ear, the audio device includes a second side 220b coupled to the attachment feature 218 and a first side 220a that folds toward the second side 220b. Similarly, the second cantilevered portion 222 includes a second side 222b and a first side 222a that fold toward the second side 220b when the audio device is inserted into the wearer's ear. The second side 220b of the first cantilevered portion 220 is coupled to the attachment feature 218. The second side 222b of the first cantilevered portion 222 is also coupled to the attachment feature 218. In an embodiment, second side 220b of first cantilevered portion 220 and second side 222b of second cantilevered portion 222 are attached to attachment feature 218. In an embodiment, first cantilevered portion 220, second cantilevered portion 220, and attachment feature 218 are integrally formed. Additionally, as illustrated in FIG. 11 , opening 224 of attachment feature 218 may be somewhat blocked by second side 222b of second cantilevered portion 222.

[0064] As described above, first cantilevered portion 220 and second cantilevered portion 222 provide flexibility for various ear sizes and geometries. In embodiments, stability band 216 includes other features to increase flexibility and / or comfort.

[0065] As an example, as shown in Figures 10 and 11, one or more of the perimeters of first free sides 220a and 222a are not continuous, but instead include fringes (or fingers). The width of each finger need not be substantially the same. In one example, thinner fingers are used in areas where greater flexibility is desired. In areas of the ear where there are abrupt changes in ear geometry (e.g., curvature) or more variation from person to person, fringes provide flexibility for a single stability band 216 to fit most ears. Although not illustrated, in some embodiments, only a portion of first cantilevered portion 220 or second cantilevered portion 222 includes fringes.

[0066] 10 and 11, the stability band 216 is designed with flexible ribs instead of using fringes. The flexible ribs can be horizontal or vertical. The flexible ribs are easily deformable by insertion of the audio device including the stability band into the wearer's ear. In areas of the ear where there are sudden changes in ear geometry (e.g., curvature) or more variation from person to person, the flexible ribs provide flexibility for a single stability band 216 to fit most ears. In embodiments, only a portion of the first cantilevered portion 220 or the second cantilevered portion 222 includes ribs.

[0067] In embodiments, stability band 216 is made of any biocompatible material and has various thicknesses. In one example, where less flexibility is desired, a stiffer material is used. In areas where more flexibility is desired, for example, due to different ear geometries or curved areas of the ear, a softer material can be used to increase flexibility.

[0068] The dual-planar stability band 216 provides high compliance in the direction of the bud towards the ear canal and some stiffness in the vertical direction when the wearer attempts to rotate or remove the earpiece.

[0069] 12A-12C are side perspective views 1200A, 1200B, and 1200C of different stability band designs according to embodiments of the present disclosure.

[0070] As mentioned, in embodiments, the first free side 222a of the stability band 216 is designed such that when the audio device is positioned within the wearer's ear and the first free side 222a is folded toward the attachment feature 218, and more specifically, toward the opening 224 of the attachment feature 218 that is aligned with the resistance port 210, the first free side 222a only partially covers the resistance port 210. Accordingly, as shown in FIGS. 12A-12C , the height of the first free side 222a may decrease along the length of the first free side 222a. In other words, as illustrated by FIGS. 12A-12C , the first free side 222a may slope downward at different angles. Furthermore, as shown, the decrease in height of the first free side 222a may vary such that the decrease in height of the first free side 222a increases along the length of the first free side 222a.

[0071] The in-ear audio output devices described herein are applicable to a variety of devices, including audio headphones, hearing aids, hearing assistance headphones, noise masking earbuds, ANR headphones, aviation headphones, and other devices that include in-ear components.

[0072] Numerous uses of, and departures from, the specific devices and techniques disclosed herein may be made without departing from the concepts of the invention. The invention should therefore be construed as embracing each and every novel feature and novel combination of features disclosed herein and limited only by the spirit and scope of the appended claims. [Explanation of symbols]

[0073] 30-1B Center line 30-1C center line 32-1B Entrance 32-1C Entrance 110 Antitragus region 120 Antihelical region 130 areas 132 areas 134 areas 140 areas 202 Main Unit 204 Earbud Housing 206 Nozzle 208 Sealing structure 210 Resistor Port 212 Massport 214 Feedforward microphone (first feedforward microphone) 216 Stability Band 220 First cantilever 220a First Aspect of Freedom 220b Second Aspect 222 Second cantilever 222a The first aspect of freedom 222b Second Aspect 224 Opening 226 Feedforward microphone (second feedforward microphone) 240 Resistive Mesh

Claims

1. An in-ear audio output device, comprising: an acoustic chamber defined by an earbud housing shaped to fit over the inferior concha of the ear of a wearer of the in-ear audio output device, the earbud housing comprising: a resistive port located on a first side of the earbud housing, creating an opening in a wall of the earbud housing to couple the acoustic chamber with a space outside the earbud housing; an acoustic chamber comprising: a first feedforward microphone located on a second side of the earbud housing, the second side being substantially opposite the first side of the earbud housing; A stability band, at least one attachment feature including an opening aligned with the resistance port for coupling the stability band to the earbud housing and coupling the acoustic chamber to a space outside the stability band; a first side substantially opposite the attachment feature that only partially covers the resistance port when the in-ear audio output device is positioned within the wearer's ear and the first side of the stability band is folded under the antitragus of the wearer's ear and toward the attachment feature.

2. a nozzle coupled to an outer surface of the earbud housing, the nozzle having a flattened distal end, the nozzle extending toward an ear canal of the wearer's ear, the nozzle including an acoustic passageway for conducting sound waves to the ear canal of the wearer; 10. The in-ear audio output device of claim 1, further comprising: a substantially spherical dome-shaped sealing structure extending from the flat distal end of the nozzle.

3. the second side of the earbud housing containing the first feedforward microphone substantially opposite the first side of the earbud housing containing the resistive port; 2. The in-ear audio output device of claim 1, further comprising a second side of the earbud housing including the first feedforward microphone that is longitudinally opposite the first side of the earbud housing that includes the resistance port, such that the first feedforward microphone sits in the navicularis of the wearer's ear and the resistance port sits in the cavity of the concha of the wearer's ear and is aligned with the intertragal notch of the wearer's ear.

4. The in-ear audio output device of claim 1 , wherein the resistive port comprises a stadium shape having a maximum length of about 1 millimeter to about 3 millimeters.

5. The in-ear audio output device of claim 1 , wherein the at least one attachment feature of the stability band is shaped to straddle a periphery of the earbud housing.

6. the opening tapers from a first side of the attachment feature distal to the earbud housing to a second side of the attachment feature proximal to the earbud housing, such that: at the first side of the mounting feature, the opening includes a first maximum length greater than a maximum length of the resistance port and a first maximum height greater than a maximum height of the resistance port; 2. The in-ear audio output device of claim 1, wherein at the second side of the mounting feature, the opening includes a second maximum length equal to the maximum length of the resistive port and a second maximum height equal to the maximum length of the resistive port.

7. The stability band a first cantilevered portion shaped to flexibly fit under the antihelix of the wearer's ear; a second cantilevered portion shaped to flexibly fit under the antitragus, a second side of the stability band coupled to the attachment feature; 10. The in-ear audio output device of claim 1, further comprising: a second cantilevered portion comprising the first side of the stability band, the first side of the stability band being substantially opposite the second side of the stability band.

8. The in-ear audio output device of claim 7 , wherein the second cantilevered portion includes at least one of a horizontal rib or a vertical rib.

9. 2. The in-ear audio output device of claim 1, wherein a height of the first side of the stability band decreases along a length of the first side of the stability band such that the resistance port is not blocked by the first side of the stability band when the in-ear audio output device is positioned within the wearer's ear with the first side folded under the antitragus and toward the attachment feature.

10. 10. The in-ear audio output device of claim 9, wherein the reduction in height of the first side of the stability band varies such that the reduction in height of the first side of the stability band increases along the length of the first side of the stability band.

11. The in-ear audio output device of claim 1 , wherein the stability band is detachable from the in-ear audio output device.

12. 10. The in-ear audio output device of claim 1, further comprising a mass port located on the second side of the earbud housing, the mass port being in the same plane as the first feedforward microphone.

13. a body coupled to an outer surface of the earbud housing that extends away from the ear canal of the wearer's ear; 2. The in-ear audio output device of claim 1, further comprising: a second feedforward microphone located on the body, the second feedforward microphone being located longitudinally opposite the first side of the earbud housing containing the resistance port such that the second feedforward microphone is near the navicularis of the wearer's ear and the resistance port seats in the cavity of the concha (234) of the wearer's ear and is aligned with the intertragal notch of the wearer's ear.

14. 14. The in-ear audio output device of claim 13, wherein the second feedforward microphone is outside the ear when the in-ear audio output device is positioned in the ear of the wearer.

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