Abstract: Techniques for user authentication via in-ear acoustic measurements are disclosed. An in-ear device emits an acoustic signal and detects an otic response to the acoustic signal. A user signature is generated based at least on the otic response to the acoustic signal. The user signature is compared with a reference signature, to determine whether the in-ear device has changed users.

Abstract: An audio device with a body configured to be worn on or abutting an outer ear of a user, wherein the body is configured to contact at least one of the outer ear and the portion of the head that abuts the outer ear, at two separate spaced contact locations, and wherein the body is compliant at a body portion that defines one of the contact locations. The device also has an acoustic module carried by the body and configured to locate a sound-emitting opening anteriorly of and proximate the user's ear canal opening when the body is worn on or abutting the ear of the user.

Abstract: An audio device with a body configured to be worn on or abutting an outer ear of a user, wherein the body is configured to contact at least one of the outer ear and the portion of the head that abuts the outer ear, at two separate spaced contact locations, and wherein the body is compliant at a body portion that defines one of the contact locations. The device also has an acoustic module carried by the body and configured to locate a sound-emitting opening anteriorly of and proximate the user's ear canal opening when the body is worn on or abutting the ear of the user.

Abstract: An audio device with a body configured to be worn on or abutting an outer ear of a user, wherein the body is configured to contact at least one of the outer ear and the portion of the head that abuts the outer ear, at two separate spaced contact locations, and wherein the body is compliant at a body portion that defines one of the contact locations. The device also has an acoustic module carried by the body and configured to locate a sound-emitting opening anteriorly of and proximate the user's ear canal opening when the body is worn on or abutting the ear of the user.

Abstract: An eartip includes a compliant portion that forms at least a portion of a sound channel, and a wax guard that is supported in the compliant portion and is disposed within the sound channel. The wax guard includes a porous, planar body that permits the passage of acoustic energy but inhibits the passage of cerumen therethrough, and a retention member. The retention member is arranged along an outer edge of the planar body and in direct contact with the compliant portion. The retention member includes a plurality of openings. A compliant material that forms the compliant portion permeates the openings in the retention member to assist in retaining the wax guard in the compliant portion.

Abstract: An in-ear wearable that can include an electro-acoustic transducer; a housing supporting the electro-acoustic transducer such that the housing and the electro-acoustic transducer together defining an acoustic volume, a feedback microphone disposed within the acoustic volume to receive the acoustic energy, the feedback microphone including a microphone port, the feedback microphone transducing acoustic energy received at the microphone port into a feedback microphone signal; and a port defined within the housing, the port extending from a first opening to a second opening, wherein the port acoustically couples the acoustic volume to a space outside the housing such that outside acoustic energy from the space outside the housing enters the first acoustic volume through a path that does not pass through the second acoustic volume, wherein the first opening does not extend beyond a first plane tangent to a point of the microphone port nearest to acoustic exit port and orthogonal to a longitudinal axis of the hous

Abstract: An in-ear wearable that can include an electro-acoustic transducer; a housing supporting the electro-acoustic transducer such that the housing and the electro-acoustic transducer together defining an acoustic volume, a feedback microphone disposed within the acoustic volume to receive the acoustic energy, the feedback microphone including a microphone port, the feedback microphone transducing acoustic energy received at the microphone port into a feedback microphone signal; and a port defined within the housing, the port extending from a first opening to a second opening, wherein the port acoustically couples the acoustic volume to a space outside the housing such that outside acoustic energy from the space outside the housing enters the first acoustic volume through a path that does not pass through the second acoustic volume, wherein the first opening does not extend beyond a first plane tangent to a point of the microphone port nearest to acoustic exit port and orthogonal to a longitudinal axis of the hous

Abstract: An earphone includes a loudspeaker, a microphone, a housing supporting the loudspeaker and microphone, and ear tip surrounding the housing and configured to acoustically couple both the loudspeaker and the microphone to an ear canal of a user, and to acoustically close the entrance to the user's ear canal. A processor provides output audio signals to the loudspeaker, receives input audio signals from the microphone, extracts a rate of respiration from the input audio signals, adjusts the output audio signals based on the extracted rate of respiration, and provides the adjusted output audio signals to the loudspeaker.

Abstract: Various implementations include audio devices and related earpieces. In certain implementations, an earpiece includes an electro-acoustic transducer and an acoustic back volume configured to provide a desirable fit along with desirable acoustic performance. In some particular aspects, an earpiece includes: an electro-acoustic transducer; a housing supporting the electro-acoustic transducer such that the housing and the electro-acoustic transducer together define a first acoustic volume and a second acoustic volume, the electro-acoustic transducer being arranged such that a first radiating surface of the transducer radiates acoustic energy into the first acoustic volume coupled to an outlet and such that a second radiating surface of the transducer radiates acoustic energy into the second acoustic volume, where at least a portion of the second acoustic volume is located between the first radiating surface and the outlet.

Abstract: An ear tip for an earpiece including a body, an insertion end, and a retention structure. Some examples include an elongated fin along a portion of an outer leg of the retention structure. Some examples include an extended insertion end configured to insert further into a user's ear canal and including a mushroom cap for providing contact with an interior portion of the user's ear canal and to form an acoustic seal. Some examples may include an umbrella associated with the insertion end, between the mushroom cap and the body. Electrically conductive elements may be associated with any of the elongated fin, the umbrella, and the mushroom cap, to provide electrical contact with the user's skin for sensing electrical signals or for delivery of electrical stimulation.

Abstract: An eartip includes a compliant portion that forms at least a portion of a sound channel, and a wax guard that is supported in the compliant portion and is disposed within the sound channel. The wax guard includes a porous, planar body that permits the passage of acoustic energy but inhibits the passage of cerumen therethrough, and a retention member. The retention member is arranged along an outer edge of the planar body and in direct contact with the compliant portion. The retention member includes a plurality of openings. A compliant material that forms the compliant portion permeates the openings in the retention member to assist in retaining the wax guard in the compliant portion.

Abstract: Various implementations include audio devices and related earpieces. In certain implementations, an earpiece includes an electro-acoustic transducer and an acoustic back volume configured to provide a desirable fit along with desirable acoustic performance. In some particular aspects, an earpiece includes: an electro-acoustic transducer; a housing supporting the electro-acoustic transducer such that the housing and the electro-acoustic transducer together define a first acoustic volume and a second acoustic volume, the electro-acoustic transducer being arranged such that a first radiating surface of the transducer radiates acoustic energy into the first acoustic volume coupled to an outlet and such that a second radiating surface of the transducer radiates acoustic energy into the second acoustic volume, where at least a portion of the second acoustic volume is located between the first radiating surface and the outlet.

Abstract: An audio device with a body configured to be worn on or abutting an outer ear of a user, wherein the body is configured to contact at least one of the outer ear and the portion of the head that abuts the outer ear, at two separate spaced contact locations, and wherein the body is compliant at a body portion that defines one of the contact locations. The device also has an acoustic module carried by the body and configured to locate a sound-emitting opening anteriorly of and proximate the user's ear canal opening when the body is worn on or abutting the ear of the user.

Abstract: An audio device with a body configured to be worn on or abutting an outer ear of a user, wherein the body is configured to contact at least one of the outer ear and the portion of the head that abuts the outer ear, at two separate spaced contact locations, and wherein the body is compliant at a body portion that defines one of the contact locations. The device also has an acoustic module carried by the body and configured to locate a sound-emitting opening anteriorly of and proximate the user's ear canal opening when the body is worn on or abutting the ear of the user.

Abstract: An audio device with a body configured to be worn on or abutting an outer ear of a user, wherein the body is configured to contact at least one of the outer ear and the portion of the head that abuts the outer ear, at two separate spaced contact locations, and wherein the body is compliant at a body portion that defines one of the contact locations. The device also has an acoustic module carried by the body and configured to locate a sound-emitting opening anteriorly of and proximate the user's ear canal opening when the body is worn on or abutting the ear of the user.

Abstract: An earpiece includes an electro-acoustic transducer and a housing. The housing supports the electro-acoustic transducer such that the housing and the electro-acoustic transducer together define a first acoustic volume and a second acoustic volume. The electro-acoustic transducer is arranged such that a first radiating surface of the transducer radiates acoustic energy into the front acoustic volume and such that a second radiating surface of the transducer radiates acoustic energy into the second acoustic volume. A front port couples the first acoustic volume to a space outside the housing, and a rear port couples the second acoustic volume to the space outside the housing. Respective outlet ends of the front port and the rear port combine before exiting the housing via a combined exit volume and an exit port.

Abstract: An earpiece includes an acoustic mass element, and an acoustic resistance element that is arranged acoustically in parallel with the acoustic mass element. The acoustic mass element and the acoustic resistance element are arranged to couple a user's ear canal to an external environment when worn.

Abstract: Techniques for user authentication via in-ear acoustic measurements are disclosed. An in-ear device emits an acoustic signal and detects an otic response to the acoustic signal. A user signature is generated based at least on the otic response to the acoustic signal. The user signature is compared with a reference signature, to determine whether the in-ear device has changed users.