Patent application number | Description | Published |
20080205677 | Hearing apparatus with interference signal separation and corresponding method - The perceptibility of a useful signal during the binaural supply of a user is to be improved. To this end, a hearing apparatus with at least one microphone is proposed to pick up an input signal, which has a useful sound and an interference sound. An interference signal estimation device is used to estimate the interference sound in the input sound. A signal processing device provides a first output signal on the basis of the estimated interference sound for the one ear of the user and a second output signal on the basis of the estimated interference sound for the other ear of the user. The second output signal is provided with a predetermined time offset compared with the first output signal. A virtual local displacement of the interference signal source thus results so that the useful signal can be better perceived. | 08-28-2008 |
20080212814 | Differential directional microphone system and hearing aid device with such a differential directional microphone system - A differential direction microphone system for a hearing aid device is described, comprising: a first directional microphone stage with a first differential directional microphone, and a second directional microphone stage with a further differential directional microphone, with the second directional microphone stage being connected downstream from the first directional microphone stage, where the directivity of the first directional microphone stage is essentially oriented in the opposite direction to the directivity of the second directional microphone stage, with the differential direction microphone system having a directional characteristic, of which the directivity is essentially orthogonal to an axis predetermined by the directivities of the first and the second directional microphone stage. | 09-04-2008 |
20080226105 | Method for the time-controlled adjustment of a hearing apparatus and corresponding hearing apparatus - The training of a hearing apparatus in respect of an individual adjustment is to be developed in a more user-friendly manner. To this end, provision is firstly made to automatically classify a hearing situation, to adjust a parameter of the signal processing facility of the hearing apparatus and to automatically learn the adjusted parameters for the current hearing situation. A temporal monitoring of the steps “classifying” and “adjusting” is however carried out here and the automatic learning is only triggered if the classified hearing situation and the adjustment of the parameters have not changed over a predetermined time period. This not only simplifies the training, but also enables a more rapid training by means of automatically triggered training events. | 09-18-2008 |
20090279724 | Method for operating a hearing device and microphone system for hearing device - A method for operating a hearing device, an associated microphone system comprising at least two omnidirectional microphones, and a hearing device are provided. The microphones emit microphone signals and are electrically interconnected with one another in order to form directional characteristics. A damping of the upper frequency range of the microphone signals is determined from the lower frequency range of the microphone signals. The impression of a wide-band directional microphone is produced as a result. | 11-12-2009 |
20090290734 | HEARING APPARATUS WITH AN EQUALIZATION FILTER IN THE FILTER BANK SYSTEM - Multi-stage filter bank systems with filter banks of different bandwidth frequently cause interference in hearing apparatuses and in particular in hearing devices. Therefore a hearing apparatus is proposed with a filter bank system having a multi-stage analysis filter bank and/or a multi-stage synthesis filter bank, to break down an input signal of the hearing apparatus into a number of partial band signals by way of a number of filter bank channels and/or to recombine partial band signals of a number of filter bank channels. The filter bank system is equipped with at least one equalization filter, to equalize differences in the complex frequency responses between filter bank channels. It is thus possible in particular to equalize group delay time differences as well as attenuation and/or amplification | 11-26-2009 |
20100329493 | HEARING APPARATUS AND METHOD FOR SUPPRESSING FEEDBACK IN A HEARING APPARATUS - A hearing apparatus and an associated method for suppressing feedback include a microphone emitting a microphone signal and a receiver picking up a receiver signal by subtracting a compensation signal from the microphone signal. The hearing apparatus includes a number of preset static first compensation filters for forming first compensation signals from the receiver signal and a first selection unit, which selects a first compensation signal in such a way that a feedback signal caused by the feedback is minimal in the receiver signal. An advantage thereof is that adaptation artifacts cannot occur. | 12-30-2010 |
20110007918 | FILTER BANK CONFIGURATION FOR A HEARING DEVICE - A filter bank configuration for a hearing device has filters in an analysis filter bank and corresponding filters in a synthesis filter bank that are coupled pair-wise to form a channel in each case. In order to compensate for a hearing loss, sub-band signals are amplified in the individual channels with the aid of multipliers. In the process, an audible distortion of an output signal Y of the filter bank configuration as a result of differences between amplification factors of the multipliers of neighboring channels should be prevented. Here, at least one channel changes a phase of a sub-band signal transmitted by the channel such that a difference between a group delay of the filter bank configuration and a prescribable reference value is reduced for at least one predetermined frequency. The filter bank configuration is particularly suited to hearing aids. | 01-13-2011 |
Patent application number | Description | Published |
20100329493 | HEARING APPARATUS AND METHOD FOR SUPPRESSING FEEDBACK IN A HEARING APPARATUS - A hearing apparatus and an associated method for suppressing feedback include a microphone emitting a microphone signal and a receiver picking up a receiver signal by subtracting a compensation signal from the microphone signal. The hearing apparatus includes a number of preset static first compensation filters for forming first compensation signals from the receiver signal and a first selection unit, which selects a first compensation signal in such a way that a feedback signal caused by the feedback is minimal in the receiver signal. An advantage thereof is that adaptation artifacts cannot occur. | 12-30-2010 |
20110007918 | FILTER BANK CONFIGURATION FOR A HEARING DEVICE - A filter bank configuration for a hearing device has filters in an analysis filter bank and corresponding filters in a synthesis filter bank that are coupled pair-wise to form a channel in each case. In order to compensate for a hearing loss, sub-band signals are amplified in the individual channels with the aid of multipliers. In the process, an audible distortion of an output signal Y of the filter bank configuration as a result of differences between amplification factors of the multipliers of neighboring channels should be prevented. Here, at least one channel changes a phase of a sub-band signal transmitted by the channel such that a difference between a group delay of the filter bank configuration and a prescribable reference value is reduced for at least one predetermined frequency. The filter bank configuration is particularly suited to hearing aids. | 01-13-2011 |
20120076332 | METHOD AND DEVICE FOR FREQUENCY COMPRESSION WITH HARMONIC CORRECTION - Artifacts occurring during frequency compression, in particular in the case of hearing aids, are avoided or reduced. The method compresses the frequency of an audio signal having a fundamental frequency and at least one harmonic. The audio signal is provided in a plurality of frequency channels. The harmonic of the audio signal is shifted or mapped from a first frequency channel of the plurality of frequency channels into a second frequency channel. In addition a frequency which is likewise harmonic with respect to the fundamental frequency is estimated in the second frequency channel, the harmonic being shifted or mapped onto the estimated frequency. As a result the harmonic pattern is preserved in the compressed signal and the artifacts are reduced. | 03-29-2012 |
20120076333 | METHOD AND DEVICE FOR FREQUENCY COMPRESSION WITH SELECTIVE FREQUENCY SHIFTING - A method and device for frequency compression of audio signals to reduce the occurrence of artifacts. A component of the audio signal having a plurality of frequency channels is shifted from a first frequency channel into a second frequency channel. A dominant instantaneous frequency is determined in the first frequency channel. During shifting or mapping, first the entire first frequency channel, including the dominant instantaneous frequency, is shifted or mapped into the second frequency channel, wherein the dominant instantaneous frequency obtains an intermediate frequency position. A final frequency position for the dominant instantaneous frequency is determined using a predefined compression characteristic in the second frequency channel, starting from the frequency position of the dominant instantaneous frequency in the first frequency channel. Finally, the dominant instantaneous frequency is shifted or mapped from the intermediate frequency position to the final frequency position. | 03-29-2012 |
20120076335 | METHOD AND DEVICE FOR FREQUENCY COMPRESSION IN A HEARING AID - A hearing aid device suitable for executing a frequency compression is optimized to achieve a better assignment between channels of a source frequency range and channels of a target frequency range. A frequency range that can be transmitted by the hearing aid device is split into a number of frequency bands, after which a number of adjacent frequency bands are combined into at least one group of frequency bands and then one frequency band is selected from each group of frequency bands. The selected frequency bands are moved respectively into a target frequency band permanently assigned to the respective group. This prevents that a number of frequency bands from the source frequency range are shifted to the same target frequency band. | 03-29-2012 |