Abstract: At least one exemplary embodiment that is directed to a conformal hearing aid comprising: a hearing aid body, where the hearing aid body houses a microphone and a receiver, where the microphone is positioned within the hearing aid body to measure acoustic signals from an ambient environment, and where the receiver is positioned within the hearing aid body to emit acoustic signals toward a tympanic membrane of a user; an expandable element, where the expandable element is operatively connected to the hearing aid body, and where the expandable element is configured to encompass a circumferential portion of the hearing aid body when expanded; and an inflation management system, where the inflation management system is configured to expand the expandable element when actuated.

Abstract: This invention relates to a system (300) for measuring acoustic properties of a vent (126) in a hearing aid. The system (300) comprises: a microphone (202) converting ambient sound pressure to an electric sound signal; a signal processing unit (302) connected to the microphone (202) and generating a processed electric sound signal; and a speaker (204) converting the processed electric sound signal to a processed sound pressure. In addition, the system comprises a determining means, which is adapted to determine the acoustic properties by measuring the acoustic feedback from the speaker 204 to the microphone (202).

Abstract: A method of modelling a feedback path from a receiver to a microphone in a hearing instrument, includes applying an electronic probe signal with an increasing level as a function of time to the receiver for conversion of the electronic probe signal into an acoustic probe signal output by the receiver, monitoring values of a first quality parameter calculated based at least in part on recorded microphone output signal, and after the first quality parameter reaches a predetermined first threshold value, determining at least one parameter of the feedback path based at least in part on the recorded microphone output signal values.

Abstract: A method and a hearing device for cancelling or preventing feedback are disclosed. The hearing device comprises a microphone (1), a transfer function (2) and a receiver (3), wherein the transfer function (2) defines relation between an input signal (12) of the hearing device and an output signal (13, 13?) of the hearing device. The method according to the present invention comprises the steps of estimating an external transfer function (21) of an external feedback path (11) defined by sound traveling from the receiver (3) to the microphone (1), estimating the input signal (12?) having no feedback components of the external feedback path (11) using an auxiliary signal (15), which does not comprise feedback components of the external feedback path (11), and using the estimated input signal (14) for estimating the external transfer function (21) of the external feedback path (11).

Abstract: During a telephony session, a determination is made on a mobile computing device that one or more designated conditions exist by which radio interference generated from the mobile computing device is to be reduced. In response, a power state of a set of one or more components of the mobile computing device is lowered. This reduces radio interference from those components. The set of components are ancillary to the mobile computing device's ability to maintain the telephony session, so that the telephony session is not affected by the reduction of power to the components.

Abstract: A processor operates on samples of a digital output signal to determine samples of a digital correction signal. The output signal samples are directed to an output channel for transmission from a speaker. The digital correction signal samples are supplied to a first digital-to-analog converter for conversion into an analog correction signal. The subtraction circuit generates a difference between a first analog signal provided by a microphone and the analog correction signal. The analog correction signal is an estimate of a contribution to the first analog signal due to a direct path transmission between the speaker and the microphone. The processor also receives a digital input signal derived from the difference signal, and, performs acoustic echo cancellation on the digital input signal to obtain a resultant signal. The acoustic echo cancellation is configured to remove contributions to the digital input signal due to reflected path transmissions.

Abstract: Feedback detection, adaptive notch filtering, and gain adjustment are combined for managing feedback. Feedback detection includes detection of short term and long term spectral peaks and assessing their magnitude, shape, rate of growth, and power concentration ratio. A plurality of notch filters are available and are allocated according to the spectral magnitude of the feedback detected. Wide band gain adjustment supplements the notch filters.

Abstract: The method for manufacturing an adjusted hearing device (1b) comprises the step of using first data (16a) obtained from a first hearing device (1a) adjusted to the preferences of a first user (5a) for adjusting a second hearing device (1b) of a second user (5b). This may comprise converting for compensating for differences between a hearing loss of said first user and a hearing loss of said second user and/or converting for compensating for differences between said first hearing device and said second hearing device. Preferably, said first data comprise fitting data (16). The system comprises a first hearing device (1a), a second hearing device (1b) and a converting system (15) operationally connectable to said first and said second hearing devices, adapted to converting first data (16a) from said first hearing device into second data (16b) for adjusting said second hearing device. Preferably, the system also comprises a communication link (7) between said first hearing device and said second hearing device.

Abstract: A hearing aid with anti feed back system, the hearing aid including a signal path from at least one input transducer to an output transducer, a signal processing unit, acoustic environment detection capability, and a parameter generator that generates input to the setting of signal processing parameters to be used in the signal processing unit based on either manual input or from the results of acoustic environment detection, and an alert signal generator that generates an alert signal to the anti feed back system whenever one or more preselected input to the generation of signal processing parameters undergoes changes.

Abstract: A shielding element and a decoupling element are integrated into a combined attenuation element. The shielding element may be a shielding foil, preferably made of copper. The attenuation element may include a flexible backing foil, preferably a plastic backing foil which supports the shielding foil. It may also include an adhesive layer with which the electronic component is affixed to a housing. The physical properties of all elements of the attenuation element are attuned to one another such that it simultaneously attenuates both electromagnetic alternating fields as well as mechanical oscillations.

Abstract: Method and apparatus for determination of gain margin of a hearing assistance device under test. In varying examples, the impulse response for multiple levels can be taken and used to arrive at a gain margin. The method and apparatus, in various examples, process critical portions of the resulting data for efficient processing and to increase accuracy of measurements. The method and apparatus performing a plurality of measurements to determine impulse responses and to derive gain margin as a function of frequency therefrom. The present subject matter includes principles which may are adapted for use within a hearing assistance device using a single white noise stimulus, according to one example. The principles set forth herein can be applied to occluding and non-occluding hearing device embodiments. Additional method and apparatus can be found in the specification and as provided by the attached claims and their equivalents.

Abstract: The invention specifies a hearing device, especially an in-the-ear hearing aid, and a method for suppressing acoustic feedback, with at least one ultrasound signal being emitted by the hearing device. The ultrasound signal reflected and fed back from the environment of the hearing device is picked up by at least one microphone and/or by at least one ultrasound receive unit of the hearing device. A feedback suppression unit of the hearing device is regulated by the picked up and evaluated ultrasound signal. The advantage of this is that feedback suppression in hearing devices can be regulated both quickly and also precisely.

Abstract: A method is described for reduction of occlusion effects in an acoustic appliance which closes an auditory channel, wherein an audio signal in the transmission path of the acoustic appliance is processed by a signal processing unit and is emitted via an output transducer, which is arranged in the auditory channel, as an acoustic signal. A resultant sound signal is then detected by an auditory channel microphone and is supplied to a variable loop filter which is arranged in a feedback loop of an occlusion reduction unit for the acoustic appliance, whose output signal is injected into the transmission path of the audio signal. In this case, the loop filter is readjusted as a function of information from the signal processing unit. A clean copy of the abstract that incorporates the above amendments is provided herewith on a separate page.

Abstract: The invention relates to a hearing instrument for processing an input sound to an output sound according to a user's needs. The invention further relates to a method of operating a hearing instrument and to use of a hearing instrument. The object of the present invention is to provide an alternative scheme for handling acoustic feedback in a hearing instrument.

Abstract: The invention relates to a hearing aid system comprising first and second spatially separated hearing instruments, the system being adapted for processing input sounds to output sounds according to a user's needs. The invention further relates to a method and use. The object of the present invention is to provide an alternative scheme for reducing the effect of acoustic feedback in a hearing aid system.

Abstract: The invention relates to a hearing instrument for processing an input sound to an output sound according to a user's needs. The invention further relates to a method of estimating acoustic feedback in a hearing instrument. The object of the present invention is to reduce the impact of tonal components in the target input signal on the quality of the estimate of acoustic feedback.

Abstract: A method is described for reduction of occlusion effects in an acoustic appliance which closes an auditory channel, wherein an audio signal in the transmission path of the acoustic appliance is processed by a signal processing unit and is emitted via an output transducer, which is arranged in the auditory channel, as an acoustic signal. A resultant sound signal is then detected by an auditory channel microphone and is supplied to a variable loop filter, which is arranged in a feedback loop of an occlusion reduction unit for the acoustic appliance. The output signal from the loop filter is injected into the transmission path of the audio signal. The occlusion reduction unit is in this case controlled adaptively, with at least one signal from the transmission path of the audio signal and/or from the feedback loop being used to control the loop filter for the occlusion reduction unit.

Abstract: The present invention relates to a new type of hearing aid with a housing that is adapted for positioning in the ear canal of a user and attached to an elongate member that is adapted for positioning in the pinna outside the ear canal of the user. The elongate member is adapted for removable interconnection with the hearing aid the housing of which is adapted for positioning in the ear canal of a user and accommodates a signal processor for processing an audio signal into an audio signal compensating a hearing loss and a receiver that is connected to an output of the signal processor for converting the processed compensated audio signal into a sound signal.

Abstract: A hearing system includes a hearing device with an input acoustical/electrical converter. The system is controllably operable in at least first and second modes. A sensing unit senses behavior of an acoustical impedance of an acoustical input of the input converter. An evaluation unit evaluates the sensed behavior over at least one predetermined behavior of the acoustical impedance. An output of the evaluation unit controls change over from the first mode to the second mode.

Abstract: This disclosure relates to measurement of maximum stable gain of a hearing assistance device, including but not limited to hearing aids, as a function of frequency. In various approaches an adaptive filter with a variable step size is used to determine maximum stable gain as a function of frequency. In various approaches, the determination is done in process steps performed by the hearing assistance device. In various approaches, the determination is done in process steps performed by the hearing assistance device and by a host computer.

Abstract: An occluding hearing aid having anti-occlusion effect techniques combined with at least one improvement which, in the preferred embodiment, includes enhancement of acoustic output in the lower-midrange and bass frequency regions, typically between substantially 40 and 500 Hz, which regions are crucial for natural reproduction of multimedia sound and music but are not optimally processed, and generally not provided at all, in prior art hearing aids in order to avoid exacerbation of the occlusion effect. In specific embodiments, the hearing aid of the present invention includes primary or first microphone exposed to external sound plus a secondary or second microphone exposed to sound within an ear canal, in which a signal produced by the secondary microphone is applied as negative feedback to an input of a non-gain controlling signal process and amplifier driving a hearing aid receiver (transducer), whereby, it has been determined by the present inventor, the occlusion effect may be substantially canceled.

Abstract: An improved hearing aid and method that employs a combination microphone/speaker, sized to have the microphone inserted within the concha bowl of the outer ear and the speaker is inserted within which the opening of the ear canal such that it does not obstruct the same for more natural hearing.

Abstract: The hearing system (1) comprises a filtering unit (6) for improving a signal-to-noise ratio of an S+N-audio signal (S+N) composed of a desired audio signal (S) and a unwanted audio signal (N), which filtering unit (6) comprises an adaptive filter; an S+N-input for receiving said S+N-audio signal (S+N); an N*-input for receiving an N*-audio signal (N*), which is used as an estimate for said unwanted audio signal (N); and an S*-output for outputting an S*-audio signal (S*) obtained in dependence of said S+N-audio signal (S+N) and said N*-audio signal (N*), which is an approximation towards said desired signal (S); wherein the hearing system (1) comprises a selecting unit (2) operationally connected to said filtering unit (6) for selecting a first input audio signal (In1; In2; . . . ) from at least two input audio signals (In1, In2) and feeding said first input audio signal (In1; In2) either to said S+N-input or to said N*-input.

Abstract: A decorrelation method for improving feedback cancellation utilizes a small frequency shifting ratio, on the order of 0.3 percent. Frequency shifting is applied only to the high frequency portion of the signal, which is shifted alternately upward and downward.

Abstract: A method for processing signals including an input, an output and a signal processor, comprising detecting a first periodic signal received at an input, adjusting frequency or phase of the first periodic signal in response to detecting the first periodic signal, comparing an amplitude of the first periodic signal before adjusting the frequency or phase to the amplitude after adjusting the frequency or phase to produce a first amplitude change and determining whether the first periodic signal is an acoustic feedback signal based on the first amplitude change. Apparatus including signal processing electronics to receive an input signal from a microphone and programmed to provide phase or frequency changes to signals in a processing channel and to detect periodic feedback signals based on the changes of signals in the processing channel, and a speaker. Variations include feedback reduction or cancellation systems and phase or frequency adjustment systems.

Abstract: A howling margin measuring device 20 comprises processing means 28 composed of gain controlling means 21 and a compressor 22 which are connected in series and controlling means 23. The gain controlling means 21 outputs an input sound signal after giving a gain thereto. If the level of a sound signal input to the compressor 22 is equal to or higher than a threshold level, the compressor 22 outputs the sound signal after compressing it with a specified ratio. The controlling means 23 is capable of controlling the gain of the gain controlling means 21 and reading the compression level of the compressor 22.

Abstract: Adaption of signal processing for actively reducing occlusion in hearing apparatuses, and in particular in hearing aids, is to be automated further. For this purpose, a transducer transmission function, which is defined for the transmission path from the input of a receiver via the auditory canal to the output of a microphone, be subjected to an automatic plausibility check. An adjustable filter via which the microphone signal is fed back is only altered if the transducer transmission function is plausible according to a predefined criterion. Disadvantageous convergences of the adaptation algorithm can be avoided hereby and unnecessarily high computing times can be prevented.

Abstract: The invention relates to a listening system comprising a first input transducer for converting an input sound to an electrical input signal, the electrical input signal comprising a direct part and an acoustic feedback part, an output transducer for converting an electrical output signal to an output sound, a forward path being defined between the input and output transducer and comprising a signal processing unit, a feedback cancellation system for estimating acoustic feedback comprising an adaptive FBC filter arranged in parallel to the forward path, the adaptive FBC filter comprising a variable FBC filter part and an FBC update algorithm part for updating the variable FBC filter part, the FBC update algorithm part comprising first and second FBC algorithm input signals influenced by the electrical input and output signals, respectively, the first and second FBC update algorithm input signal paths comprising first and second variable filters, respectively, the listening system further comprising an electric

Abstract: Method and apparatus for entrainment containment in digital filters using output phase modulation. Phase change is gradually introduced into the acoustic feedback canceller loop to avoid entrainment of the feedback canceller filter. Various embodiments employing different output phase modulation approaches are set forth and time and frequency domain examples are provided. Additional method and apparatus can be found in the specification and as provided by the attached claims and their equivalents.

Abstract: Provided is a hearing device and method for compensating for a hearing loss. To compensate for the hearing loss, the hearing device and method utilize the gain during feedback in the forward path of a compressive system which, after having reached its steady state in “closed loop” operation, is equal to the feedback threshold gain. The steady state is reached soon after having applied a low input signal level to the hearing device, which input signal level is below 55 dB SPL (Sound Pressure Level), for example, and would result, for the open loop compressive system, in a larger gain than the feedback threshold gain of the closed loop system, respectively, would result in the maximum possible hearing device gain if maximum possible hearing device gain is below feedback threshold gain. The signal feedback gain is assessed in this steady state.

Abstract: The present invention relates to a new type of hearing device housing having an open canal section that is adapted for fitting in the ear canal of a wearer and having a short vent, the longitudinal extension of which is shorter than the longitudinal extension of the open canal section, and an output port for emission of sound towards the eardrum of the wearer when inserted in the ear canal, and an outer ear section for accommodation of electronic components and being attached to the canal section and adapted for positioning in front of the ear during use, the short vent reducing the occlusion effect, wherein the canal section comprises an open and flexible earpiece manufactured in standard sizes. The hearing device may be a hearing aid, a headset, a headphone, etc. Unlike a conventional BTE (Behind-The-Ear) hearing aid having a housing to be positioned behind the ear, the housing of the hearing device according to the present invention is positioned in front of the ear, i.e. in front of the pinna.

Abstract: A method and hearing aid mold are provided for a hearing device with a first segment for insertion into the auditory canal of the user, a second segment, which projects into the concha of the user when inserted, and a vent, which runs from the first segment into the second segment. A vent opening, which may be enclosed by a titanium ring, is directed in the second segment toward the outer ear of the user, so that an exchange of air can be achieved between the auditory canal and the rear of the outer ear through an opening in the outer ear. Ventilation of the auditory canal from the rear of the outer ear reduces the risk of feedback.

Abstract: In a process for filtering interfering signals, occurring with largely known constant repetition frequency at the use of hearing devices in or at the hearing device the repetition frequency of the interference signal shall be detected and at recognition of the known constant frequency the signal shall be suppressed or damped respectively at the expected next point of time at least partially. The detection can happen for instance via the duty cycle and/or the basic frequency of the interference signal.

Abstract: It is intended that the switching on and off of a hearing aid (I) should be made more user-friendly. To this end the hearing aid (I) is fitted with a temperature sensor (TS) to detect the body heat of the hearing aid wearer and therefore that the hearing aid is inserted in the auditory canal. The hearing aid is then switched on and off again based on the temperature signal. As an alternative to the temperature sensor, it is possible to use a pressure sensor to detect contact pressure of the hearing aid housing on the auditory canal, a resistance sensor to detect an electrical load resistance as a function of volume or an acoustic sensor to detect a sound level. It is also possible to switch the hearing aid (I) on and off wirelessly using a remote control.

Abstract: The invention is directed to an implanted microphone having reduced sensitivity to vibration. In this regard, the microphone differentiates between the desirable and undesirable vibration by utilizing at least one motion sensor to produce a motion signal when an implanted microphone is in motion. This motion signal is used to yield a microphone output signal that is less vibration sensitive. In a first arrangement, the motion signal may be processed with an output of the implantable microphone transducer to provide an audio signal that is less vibration-sensitive than the microphone output alone. Specifically, the motion signal may be scaled to match the motion component of the microphone output such that upon removal of the motion signal from the microphone output, the remaining signal is an acoustic signal.

Abstract: Systems, devices and methods for communication include an ear canal microphone configured for placement in the ear canal to detect high frequency sound localization cues. An external microphone positioned away from the ear canal can detect low frequency sound, such that feedback can be substantially reduced. The canal microphone and the external microphone are coupled to a transducer, such that the user perceives sound from the external microphone and the canal microphone with high frequency localization cues and decreased feedback. Wireless circuitry can be configured to connect to many devices with a wireless protocol, such that the user can receive and transmit audio signals. A bone conduction sensor can detect near-end speech of the user for transmission with the wireless circuitry in noisy environment. Noise cancellation of background sounds near the user can improve the user's hearing of desired sounds.

Abstract: A hearing aid circuit includes a correlation detector that detects correlation at a feedforward path input and that provides a correlation output to a phase shifter. The phase shifter introduces a phase shift along a feedforward path. A phase measurement circuit measures a phase shift at a feedforward path input, and provides a phase measurement output to an internal feedback processor. The internal feedback processor adjusts internal feedback as a function of the phase measurement to suppress coupling of external audio feedback along the feedforward path.

Abstract: There is presented a hearing aid that comprises an input transducer for transforming an acoustic input signal into an electrical input signal, a compressor for generating an electrical output signal from the electrical input signal, an output transducer for transforming the electrical output signal into an acoustic output signal, an autocorrelation estimator for calculating an autocorrelation estimate of the electrical input signal, and an acoustic loop gain estimator for determining a dynamic gain limit from the autocorrelation estimate and an instantaneous gain level of the signal processor. The invention further provides a method of adjusting signal path gain in a hearing aid, and a system for providing increased stability in a hearing aid.

Abstract: A hearing aid comprises at least one microphone (M) for converting input sound into an input signal, a subtraction node for subtracting a feedback cancellation signal from the input signal thereby generating a processor input signal, a hearing aid processor (G) for producing a processor output signal by applying an amplification gain to the processor input signal, a receiver (R) for converting the processor output signal into output sound, an adaptive feedback cancellation filter for adaptively deriving the feedback cancellation signal from the processor output signal by applying filter coefficients, calculation means for calculating the autocorrelation of a reference signal, and an adaptation means for adjusting the filter coefficients with an adaptation rate, wherein the adaptation rate is controlled in dependency of the autocorrelation of the reference signal.

Abstract: Disclosed is a hearing aid, where at least part of the hearing aid is adapted to be inserted into an ear canal of a user such that one end of the hearing aid and the tympanic membrane in the ear canal define a residual space of the ear canal, the hearing aid comprising an ambient space input transducer adapted to convert ambient sound to an electric sound signal, when the ambient sound reaches the ear of a user from an ambient space, a processor connected to said ambient space input transducer and adapted to process said electric sound signal, an output transducer connected to said processor and adapted to convert said processed electric sound signal to a sound pressure in the residual space of the ear canal, and wherein the hearing aid further comprises a residual space input transducer connected to said processor and arranged to predominantly receive said sound pressure in the residual space, and wherein the residual space input transducer is adapted to convert said sound pressure to an electric residual sp

Abstract: There is described a method for operation of a hearing device system with two microphones arranged spatially separated from one another and with sound-generating output units assigned to these microphones, in which, by comparison of the microphone signals or of signals derived therefrom, feedback is detected, and on detection of the feedback measures are initiated for reducing the feedback, and with the comparison of the microphone signals or of signals derived therefrom comprising a frequency-selective power comparison. There is also described a hearing device system suitable for this method.

Abstract: This invention relates to a system (100) and method for synthesizing an audio input signal of a hearing device. The system (100) comprises a microphone unit (102) for converting the audio input signal to an electric signal, a filter unit (110) for removing a selected frequency band of the electric signal and pass a filtered signal, a synthesizer unit (118) for synthesizing the selected frequency band of the electric signal based on the filtered signal thereby generating a synthesized signal, a combiner unit (120) for combining the filtered signal and the synthesized signal so as to generate a combined signal, and finally an output unit (122, 124, 126) for converting the combined signal to an audio output signal.

Abstract: A hearing aid comprises an input transducer (2) for deriving an electrical input signal from an acoustic input, a signal processor (3) for generating an electric output signal, an output transducer (4) for transforming the electrical output signal into an acoustic output, an adaptive estimation filter (5) for generating a feedback estimation signal, at least one first adaptive narrow-band filter (8) for narrow-band-filtering an input signal of the signal processor (3) at least one second adaptive narrow-band filter (9) for narrow-band-filtering a reference signal corresponding to an input signal of the adaptive estimation filter (5), and an adaptation mechanism (6) for updating the filter coefficients of the adaptive estimation filter (5) based on the output signals of the first and second narrow-band filters. The invention further provides a method for reducing acoustic feedback and an electronic circuit.

Abstract: A hearing aid comprises a signal path for receiving at least one audio input signal and autocorrelation index (ACI) estimating means (4), wherein the ACI comprises down-sampling means for producing a sampling-rate reduced signal of said audio input signal, sign extraction means for extracting a sign signal of said sampling rate reduced signal, memory and delay means for producing and storing delayed versions of said sign signal, comparison means for comparing a subset of the delayed versions of said sign signal with a version of the non-delayed audio input signal, averaging means for averaging the outputs of the comparison means to extract delay specific estimates of said audio signal self-resemblance, and obtaining means for obtaining an estimated autocorrelation index by determining summarized features from the delay specific estimates of said audio signal self-resemblance. This invention further provides a method and a computer program for controlling signal processing in a hearing aid.

Abstract: A hearing assistance system having adjustable bulk delay for cancellation of a time varying acoustic feedback path. The hearing assistance system including an FIR filter, coefficient update module, and delay rules module for programmable adaptive filtering. The hearing assistance system adjustable for continuous bulk delay adjustments. The hearing assistance system providing a number of coefficient update routines, including, but not limited to an LMS coefficient update process and a normalized LMS coefficient update process.

Abstract: A method for reducing oscillation of a feedback signal in a hearing aid and hearing aid configured according to the present method is provided. The method includes the steps of determining the phase of the feedback signal over a feedback path of the hearing aid and shifting only the phase of the feedback signal a predetermined amount, without modification of other signal characteristics, to achieve a non-zero net phase of the feedback signal over the feedback path such that oscillation of the signal is prevented. In one embodiment of the present method, the step of determining the phase may be performed at the time of fitting of the hearing aid to a patient. In another embodiment of the present method, the method includes the step of periodically determining the phase of the feedback signal over the feedback path such that the phase shifting may be performed based on the periodically determined phase.

Abstract: A hearing aid (200) with multiple microphones comprises a first microphone (1) for converting sound into a first audio signal, a second microphone (20) for converting sound into a second audio signal, directional processing means for combining the first and said second audio signal according to a mixing ratio to form a spatial signal, estimating means for estimating a first acoustic feedback signal entering the first microphone and a second acoustic feedback signal entering the second microphone, processing means (4) for processing said spatial signal by applying a gain not exceeding a resulting maximum gain limit to form a hearing loss compensation signal, wherein the resulting maximum gain limit is derived from the first and second acoustic feedback signals and the mixing ratio, and an output transducer (3) for converting the hearing loss compensation signal into an acoustic output. The invention further provides a method and a computer program product.

Abstract: A hearing aid includes an input transducer for transforming an acoustic input signal into an electrical input signal, a processor for generating an electrical output signal by amplifying the electrical input signal with a processor gain, an output transducer for transforming the electrical output signal into an acoustic output signal, an adaptive feedback suppression filter for generating a feedback cancellation signal, and a model gain estimator generating an upper processor gain limit and for providing a control parameter indicating a possible misadjustment of the model.

Abstract: In order to reduce feedback in a hearing aid, a hearing aid receiver is provided that comprises a housing having an inside surface and an outside surface, a motor, an active armature that is attached to the motor and attached to the inside surface of the housing, the active armature being driven in a vibrational manner by the motor, and an external passive component that is attached to the outside surface of the housing, the external passive component designed to vibrate in a direction opposed to vibrations of the active armature. A corresponding method for operating such a hearing aid receives is also provided.

Abstract: An apparatus related to earmolds with venting configurations designed to relieve the occlusion effect. Various designs provide multiple vents allow residual ear canal air volume to vent to and from air outside the ear and the earmold. In various designs, the earmold includes one vent between the residual ear canal air volume and a volume of air internal to the earmold. A second vent provides passage of air internal to the earmold and air external to the ear and the inserted earmold when worn by a user.