WO2005107320A1 - Aide auditive avec processus d'annulation électroacoustique - Google Patents

Aide auditive avec processus d'annulation électroacoustique Download PDF

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Publication number
WO2005107320A1
WO2005107320A1 PCT/US2005/013948 US2005013948W WO2005107320A1 WO 2005107320 A1 WO2005107320 A1 WO 2005107320A1 US 2005013948 W US2005013948 W US 2005013948W WO 2005107320 A1 WO2005107320 A1 WO 2005107320A1
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WO
WIPO (PCT)
Prior art keywords
hearing aid
providing
ear canal
signal
microphone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2005/013948
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English (en)
Inventor
Michael L. Petroff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2005107320A1 publication Critical patent/WO2005107320A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/05—Electronic compensation of the occlusion effect
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/40—Arrangements for obtaining a desired directivity characteristic
    • H04R25/405—Arrangements for obtaining a desired directivity characteristic by combining a plurality of transducers

Definitions

  • This writing relates to the field of hearing aids, and more specifically to an electro-acoustic cancellation processes for the minimization of the occlusion effect and ear canal resonances.
  • This writing describes at least a hearing aid with electro-acoustic cancellation process for minimization of occlusion effect and ear canal resonances.
  • a common problem associated with conventional hearing aids is the occlusion effect, in which the hearing aid user hears an undesirable accentuation of his or her voice caused by bone conduction of the voice to acoustically trapped air between the hearing aid seal and the tympanic membrane.
  • the severity of the occlusion effect varies as a function of the degree to which the hearing aid occludes the ear canal, which is largely determined by the size and Helmholtz resonant frequency of the vent between such acoustically trapped air and the outside.
  • Recent hearing aid designs accommodate relatively large vents having correspondingly high Helmholtz resonant frequencies and reduced occlusion affect, however such designs do not eliminate the occlusion effect entirely and decrease the maximum allowable amplification without feedback.
  • a hearing aid preferably but not limited to the Completely-ln-Canal type to facilitate concealment, which does not occupy virtually all air space within the canal to optimize comfort, utilizes a relatively small vent to enable high amplification without feedback but therefore also introduces substantial occlusion effect, and employs novel electro-acoustic cancellation processes whereby the occlusion effect is minimized.
  • Such cancellation processes simultaneously minimize unwanted hearing aid driven acoustic resonances in the sealed segment of the canal, and effectively enable open canal resonant modes to be electronically emulated for further enhancement of speech intelligibility without requiring in the canal audiology measurement and calibration procedures.
  • the present invention is a novel hearing aid, preferably Completely-ln-Canal to facilitate concealment, which does not occupy virtually all air space within the canal to optimize comfort, utilizes a relatively small vent to enable high amplification without feedback but therefore also introduces substantial occlusion effect, and employs electro-acoustic cancellation processes whereby the occlusion effect is minimized. Such processes simultaneously minimize unwanted hearing aid driven acoustic resonances in the sealed segment of the canal. Natural open canal resonant modes may then be effectively emulated electronically for further enhancement of speech intelligibility.
  • the electro-acoustic cancellation processes of the present invention comprises at least a first front microphone disposed on a front side of the hearing aid exposed to the outside, a rear microphone disposed on a back side of the hearing aid substantially adjacent to a speaker (receiver) and exposed to the sealed segment of the canal and to the tympanic membrane, and a vent between the sealed segment of the canal and the outside.
  • a signal from the first frdfMiSfop ⁇ speech and sound is applied to the input of a first signal process typically comprising at least one prior art function of high frequency compression, personalized hearing curve compensation, or adaptive feedback cancellation (based on different principles than the electro-acoustic cancellation processes of the present invention), and which preferably also comprises frequency response emulation of natural open canal resonant modes.
  • the first signal process provides an output signal to a first input of a power amplifier that drives the speaker, thereby providing modified sound originally monitored by the first front microphone.
  • a signal from the rear microphone which monitors sound present in the sealed segment of the canal, including occlusion effect related bone conducted sound from the user's voice and unwanted hearing aid driven acoustic resonances in the sealed segment of the canal, is applied to a second signal process comprising phase and amplitude compensated negative feedback.
  • the second signal process provides an output to a second input of the power amplifier that drives the speaker, which by virtue of such phase and amplitude compensated negative feedback, provides a signal component to the speaker and a sound field in the sealed segment of the canal that is substantially equal and opposite the occlusion effect sound and the hearing aid driven resonances.
  • the occlusion effect and hearing aid driven acoustic resonances are electro-acoustically minimized, and natural open canal resonant modes are emulated, in a hearing aid that may be of the CIC type not occupying virtually all air space within the canal for optimum user comfort.
  • a second front microphone may be disposed on a front side of the hearing aid exposed to the outside and displaced from the first front microphone along one of (i) a line that is substantially coincident with the user's mouth, (ii) a line that is substantially coincident with the back of the user's head, or (iii) a line that lies in a compromise direction between the lines described in (i) and (ii) above.
  • the output of the second front microphone is applied to a third signal process comprising a time, phase and amplitude compensated signal cancellation function for the purpose of providing a polar response null in the direction of the applicable line described in (i), (ii) or (iii).
  • the output of the third signal process is applied to a third input of the power amplifier that drives the speaker.
  • a reduction in at least one of air conducted sound from user's voice, and speech and sound emanating from behind theHi ⁇ erf is w ⁇ BWCr rY afn ⁇ HteMB.'ft single bipolar or directional microphone, in which the direction of polar nullification aligns the applicable line described in (i), (ii) or (iii), may substitute or be utilized with the fist and second microphone and third signal process.
  • FIG.1 is a three dimensional view of a hearing aid representing a preferred embodiment of the present invention, shown inserted an ear canal.
  • FIG. 2 is a functional block diagram illustrating first, second and third signal processes of the hearing aid of FIG. 1 , including a first, second and third microphone and speaker.
  • FIG. 1 illustrates the preferred embodiment of the present invention in which hearing aid HA is inserted in ear canal C which opens to Pinna P (the outer ear).
  • HA comprises first front microphone Mfl disposed on front side F of HA, second front microphone Mf2 disposed on F and displaced in distance from Mfl, speaker S disposed on rear side R of HA, and rear microphone Mr disposed on R adjacent to speaker S.
  • FIG. 2 illustrates signal processes of the preferred embodiment of the present invention, in which signal S1 from first front microphone Mfl is applied to the input of first signal process SP1, typically comprising at least one of high frequency compression, personalized hearing curve compensation, or adaptive feedback cancellation, and which preferably also comprises frequency response emulation of natural open canal resonant modes.
  • SP1 provides output signal S3 applied to a first input of a power amplifier PA, which provides signal S7 which drives speaker SK.
  • Signal S5 from the rear microphone Mr is applied to second signal process SP2 comprising phase and amplitude compensated negative feedback.
  • SP2 provides output signal S6 is applied to a second input of the power amplifier PA, which by virtue of phase and amplitude compensated negative feedback provides a signal component to speaker SK and a sound field in the sealed segment of the canal that is substantially equal and opposite ocitiiiffi. effeSiiBlnd In 'MWh aid driven resonances.
  • Signal S2 from second front microphone Mf2 is applied to third signal process SP3 comprising a time, phase and amplitude compensated signal cancellation function for the purpose of providing a polar response null in a preferred the direction.
  • the output of SP3 is. applied to a third input of power amplifier PA.
  • this writing discloses in one embodiment a hearing aid.
  • the hearing aid is completely in canal but does not occupy virtually all of the air space in the canal.
  • the hearing aid utilizes a relatively small vent to enable high amplification without feedback and introduces a substantial occlusion effect.
  • the hearing aid employs electro-acoustic , cancellation to minimize the occlusion as well as minimizes unwanted hearing aid driven acoustic resonances in the sealed segment of the canal.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Headphones And Earphones (AREA)

Abstract

Une aide auditive complète à canal entrant (HA) pour faciliter la dissimulation, l'aide auditive utilise des processus d'annulation électroacoustique (PA) dans lesquelles l'effet d'occlusion est réduit. Ces processus réduisent simultanément la résonance acoustique non désirée de l'aide auditive dans un segment hermétique du canal (A). Des modes résonants de canal ouvert naturels peuvent alors être émulé électroniquement pour renforcer davantage l'intelligibilité de la parole.
PCT/US2005/013948 2004-04-22 2005-04-21 Aide auditive avec processus d'annulation électroacoustique Ceased WO2005107320A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US56446204P 2004-04-22 2004-04-22
US60/564,462 2004-04-22

Publications (1)

Publication Number Publication Date
WO2005107320A1 true WO2005107320A1 (fr) 2005-11-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/013948 Ceased WO2005107320A1 (fr) 2004-04-22 2005-04-21 Aide auditive avec processus d'annulation électroacoustique

Country Status (1)

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WO (1) WO2005107320A1 (fr)

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006062246A1 (de) * 2006-12-22 2008-06-26 Sennheiser Electronic Gmbh & Co. Kg Hörer
WO2009049320A1 (fr) 2007-10-12 2009-04-16 Earlens Corporation Système et procédé multifonction pour une audition et une communication intégrées avec gestion de l'annulation du bruit et de la contre-réaction
EP2056624A1 (fr) 2008-04-10 2009-05-06 Oticon A/S Procédé de contrôle d'un dispositif auditif et dispositif auditif
WO2009152442A1 (fr) * 2008-06-14 2009-12-17 Michael Petroff Prothèse auditive avec techniques d'effet anti-occlusion et réponse en fréquence ultra-basse
US8687832B2 (en) 2007-10-03 2014-04-01 Oticon A/S Hearing aid system with feedback arrangement to predict and cancel acoustic feedback, method and use
US8715152B2 (en) 2008-06-17 2014-05-06 Earlens Corporation Optical electro-mechanical hearing devices with separate power and signal components
US8824715B2 (en) 2008-06-17 2014-09-02 Earlens Corporation Optical electro-mechanical hearing devices with combined power and signal architectures
US9154891B2 (en) 2005-05-03 2015-10-06 Earlens Corporation Hearing system having improved high frequency response
US9392377B2 (en) 2010-12-20 2016-07-12 Earlens Corporation Anatomically customized ear canal hearing apparatus
US9508343B2 (en) 2014-05-27 2016-11-29 International Business Machines Corporation Voice focus enabled by predetermined triggers
US9749758B2 (en) 2008-09-22 2017-08-29 Earlens Corporation Devices and methods for hearing
US9924276B2 (en) 2014-11-26 2018-03-20 Earlens Corporation Adjustable venting for hearing instruments
US9930458B2 (en) 2014-07-14 2018-03-27 Earlens Corporation Sliding bias and peak limiting for optical hearing devices
US10034103B2 (en) 2014-03-18 2018-07-24 Earlens Corporation High fidelity and reduced feedback contact hearing apparatus and methods
US10178483B2 (en) 2015-12-30 2019-01-08 Earlens Corporation Light based hearing systems, apparatus, and methods
US10292601B2 (en) 2015-10-02 2019-05-21 Earlens Corporation Wearable customized ear canal apparatus
US10492010B2 (en) 2015-12-30 2019-11-26 Earlens Corporations Damping in contact hearing systems
US11102594B2 (en) 2016-09-09 2021-08-24 Earlens Corporation Contact hearing systems, apparatus and methods
US11166114B2 (en) 2016-11-15 2021-11-02 Earlens Corporation Impression procedure
US11212626B2 (en) 2018-04-09 2021-12-28 Earlens Corporation Dynamic filter
US11350226B2 (en) 2015-12-30 2022-05-31 Earlens Corporation Charging protocol for rechargeable hearing systems
US11516603B2 (en) 2018-03-07 2022-11-29 Earlens Corporation Contact hearing device and retention structure materials
US12183341B2 (en) 2008-09-22 2024-12-31 St Casestech, Llc Personalized sound management and method
US12249326B2 (en) 2007-04-13 2025-03-11 St Case1Tech, Llc Method and device for voice operated control
US12581233B2 (en) 2007-04-13 2026-03-17 ST Case 1 Tech, LLC Method and device for voice operated control
US12586680B2 (en) 2007-02-01 2026-03-24 St Famtech, Llc Method and device for audio recording
US12591407B2 (en) 2014-10-24 2026-03-31 St R&Dtech, Llc Robust voice activity detector system for use with an earphone
US12621598B2 (en) 2017-10-23 2026-05-05 St Famtech, Llc Automatic keyword pass-through system
US12626683B2 (en) 2007-01-22 2026-05-12 St Famtech, Llc Method and device for acute sound detection and reproduction
US12634653B2 (en) 2024-06-07 2026-05-19 St Vrtech, Llc Location based audio signal message processing

Citations (3)

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Publication number Priority date Publication date Assignee Title
US5033090A (en) * 1988-03-18 1991-07-16 Oticon A/S Hearing aid, especially of the in-the-ear type
US6647123B2 (en) * 1998-02-05 2003-11-11 Bioinstco Corp Signal processing circuit and method for increasing speech intelligibility
US6831986B2 (en) * 2000-12-21 2004-12-14 Gn Resound A/S Feedback cancellation in a hearing aid with reduced sensitivity to low-frequency tonal inputs

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5033090A (en) * 1988-03-18 1991-07-16 Oticon A/S Hearing aid, especially of the in-the-ear type
US6647123B2 (en) * 1998-02-05 2003-11-11 Bioinstco Corp Signal processing circuit and method for increasing speech intelligibility
US6831986B2 (en) * 2000-12-21 2004-12-14 Gn Resound A/S Feedback cancellation in a hearing aid with reduced sensitivity to low-frequency tonal inputs

Cited By (70)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9226083B2 (en) 2004-07-28 2015-12-29 Earlens Corporation Multifunction system and method for integrated hearing and communication with noise cancellation and feedback management
US9154891B2 (en) 2005-05-03 2015-10-06 Earlens Corporation Hearing system having improved high frequency response
US9949039B2 (en) 2005-05-03 2018-04-17 Earlens Corporation Hearing system having improved high frequency response
DE102006062246A1 (de) * 2006-12-22 2008-06-26 Sennheiser Electronic Gmbh & Co. Kg Hörer
US12626683B2 (en) 2007-01-22 2026-05-12 St Famtech, Llc Method and device for acute sound detection and reproduction
US12586680B2 (en) 2007-02-01 2026-03-24 St Famtech, Llc Method and device for audio recording
US12597513B2 (en) 2007-02-01 2026-04-07 St Famtech, Llc Method and device for audio recording
US12249326B2 (en) 2007-04-13 2025-03-11 St Case1Tech, Llc Method and device for voice operated control
US12581233B2 (en) 2007-04-13 2026-03-17 ST Case 1 Tech, LLC Method and device for voice operated control
US8687832B2 (en) 2007-10-03 2014-04-01 Oticon A/S Hearing aid system with feedback arrangement to predict and cancel acoustic feedback, method and use
US10516950B2 (en) 2007-10-12 2019-12-24 Earlens Corporation Multifunction system and method for integrated hearing and communication with noise cancellation and feedback management
WO2009049320A1 (fr) 2007-10-12 2009-04-16 Earlens Corporation Système et procédé multifonction pour une audition et une communication intégrées avec gestion de l'annulation du bruit et de la contre-réaction
US11483665B2 (en) 2007-10-12 2022-10-25 Earlens Corporation Multifunction system and method for integrated hearing and communication with noise cancellation and feedback management
US10863286B2 (en) 2007-10-12 2020-12-08 Earlens Corporation Multifunction system and method for integrated hearing and communication with noise cancellation and feedback management
US10154352B2 (en) 2007-10-12 2018-12-11 Earlens Corporation Multifunction system and method for integrated hearing and communication with noise cancellation and feedback management
EP2208367A4 (fr) * 2007-10-12 2013-10-23 Earlens Corp Système et procédé multifonction pour une audition et une communication intégrées avec gestion de l'annulation du bruit et de la contre-réaction
EP2056624A1 (fr) 2008-04-10 2009-05-06 Oticon A/S Procédé de contrôle d'un dispositif auditif et dispositif auditif
WO2009152442A1 (fr) * 2008-06-14 2009-12-17 Michael Petroff Prothèse auditive avec techniques d'effet anti-occlusion et réponse en fréquence ultra-basse
US9591409B2 (en) 2008-06-17 2017-03-07 Earlens Corporation Optical electro-mechanical hearing devices with separate power and signal components
US10516949B2 (en) 2008-06-17 2019-12-24 Earlens Corporation Optical electro-mechanical hearing devices with separate power and signal components
US9961454B2 (en) 2008-06-17 2018-05-01 Earlens Corporation Optical electro-mechanical hearing devices with separate power and signal components
US9049528B2 (en) 2008-06-17 2015-06-02 Earlens Corporation Optical electro-mechanical hearing devices with combined power and signal architectures
US8715152B2 (en) 2008-06-17 2014-05-06 Earlens Corporation Optical electro-mechanical hearing devices with separate power and signal components
US8824715B2 (en) 2008-06-17 2014-09-02 Earlens Corporation Optical electro-mechanical hearing devices with combined power and signal architectures
US11310605B2 (en) 2008-06-17 2022-04-19 Earlens Corporation Optical electro-mechanical hearing devices with separate power and signal components
US9949035B2 (en) 2008-09-22 2018-04-17 Earlens Corporation Transducer devices and methods for hearing
US9749758B2 (en) 2008-09-22 2017-08-29 Earlens Corporation Devices and methods for hearing
US11057714B2 (en) 2008-09-22 2021-07-06 Earlens Corporation Devices and methods for hearing
US10237663B2 (en) 2008-09-22 2019-03-19 Earlens Corporation Devices and methods for hearing
US10511913B2 (en) 2008-09-22 2019-12-17 Earlens Corporation Devices and methods for hearing
US10743110B2 (en) 2008-09-22 2020-08-11 Earlens Corporation Devices and methods for hearing
US10516946B2 (en) 2008-09-22 2019-12-24 Earlens Corporation Devices and methods for hearing
US12183341B2 (en) 2008-09-22 2024-12-31 St Casestech, Llc Personalized sound management and method
US12374332B2 (en) 2008-09-22 2025-07-29 ST Fam Tech, LLC Personalized sound management and method
US10609492B2 (en) 2010-12-20 2020-03-31 Earlens Corporation Anatomically customized ear canal hearing apparatus
US11153697B2 (en) 2010-12-20 2021-10-19 Earlens Corporation Anatomically customized ear canal hearing apparatus
US11743663B2 (en) 2010-12-20 2023-08-29 Earlens Corporation Anatomically customized ear canal hearing apparatus
US9392377B2 (en) 2010-12-20 2016-07-12 Earlens Corporation Anatomically customized ear canal hearing apparatus
US10284964B2 (en) 2010-12-20 2019-05-07 Earlens Corporation Anatomically customized ear canal hearing apparatus
US10034103B2 (en) 2014-03-18 2018-07-24 Earlens Corporation High fidelity and reduced feedback contact hearing apparatus and methods
US11317224B2 (en) 2014-03-18 2022-04-26 Earlens Corporation High fidelity and reduced feedback contact hearing apparatus and methods
US9514745B2 (en) 2014-05-27 2016-12-06 International Business Machines Corporation Voice focus enabled by predetermined triggers
US9508343B2 (en) 2014-05-27 2016-11-29 International Business Machines Corporation Voice focus enabled by predetermined triggers
US9930458B2 (en) 2014-07-14 2018-03-27 Earlens Corporation Sliding bias and peak limiting for optical hearing devices
US11800303B2 (en) 2014-07-14 2023-10-24 Earlens Corporation Sliding bias and peak limiting for optical hearing devices
US11259129B2 (en) 2014-07-14 2022-02-22 Earlens Corporation Sliding bias and peak limiting for optical hearing devices
US10531206B2 (en) 2014-07-14 2020-01-07 Earlens Corporation Sliding bias and peak limiting for optical hearing devices
US12591407B2 (en) 2014-10-24 2026-03-31 St R&Dtech, Llc Robust voice activity detector system for use with an earphone
US9924276B2 (en) 2014-11-26 2018-03-20 Earlens Corporation Adjustable venting for hearing instruments
US11252516B2 (en) 2014-11-26 2022-02-15 Earlens Corporation Adjustable venting for hearing instruments
US10516951B2 (en) 2014-11-26 2019-12-24 Earlens Corporation Adjustable venting for hearing instruments
US10292601B2 (en) 2015-10-02 2019-05-21 Earlens Corporation Wearable customized ear canal apparatus
US11058305B2 (en) 2015-10-02 2021-07-13 Earlens Corporation Wearable customized ear canal apparatus
US10492010B2 (en) 2015-12-30 2019-11-26 Earlens Corporations Damping in contact hearing systems
US10178483B2 (en) 2015-12-30 2019-01-08 Earlens Corporation Light based hearing systems, apparatus, and methods
US11516602B2 (en) 2015-12-30 2022-11-29 Earlens Corporation Damping in contact hearing systems
US11070927B2 (en) 2015-12-30 2021-07-20 Earlens Corporation Damping in contact hearing systems
US10306381B2 (en) 2015-12-30 2019-05-28 Earlens Corporation Charging protocol for rechargable hearing systems
US10779094B2 (en) 2015-12-30 2020-09-15 Earlens Corporation Damping in contact hearing systems
US11337012B2 (en) 2015-12-30 2022-05-17 Earlens Corporation Battery coating for rechargable hearing systems
US11350226B2 (en) 2015-12-30 2022-05-31 Earlens Corporation Charging protocol for rechargeable hearing systems
US11102594B2 (en) 2016-09-09 2021-08-24 Earlens Corporation Contact hearing systems, apparatus and methods
US11540065B2 (en) 2016-09-09 2022-12-27 Earlens Corporation Contact hearing systems, apparatus and methods
US11166114B2 (en) 2016-11-15 2021-11-02 Earlens Corporation Impression procedure
US11671774B2 (en) 2016-11-15 2023-06-06 Earlens Corporation Impression procedure
US12621598B2 (en) 2017-10-23 2026-05-05 St Famtech, Llc Automatic keyword pass-through system
US11516603B2 (en) 2018-03-07 2022-11-29 Earlens Corporation Contact hearing device and retention structure materials
US11564044B2 (en) 2018-04-09 2023-01-24 Earlens Corporation Dynamic filter
US11212626B2 (en) 2018-04-09 2021-12-28 Earlens Corporation Dynamic filter
US12634653B2 (en) 2024-06-07 2026-05-19 St Vrtech, Llc Location based audio signal message processing

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