Patents by Inventor Volker Hohmann

Volker Hohmann has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10356534
    Abstract: An apparatus for controlling a dynamic compressor of a hearing aid includes a combination signal analyzer for determining the binaural similarity of a left and right audio signal and an amplification adjuster for providing an amplification value for a band of the left or right audio signal in dependence on the binaural similarity and a level of the left or right audio signal in the band.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: July 16, 2019
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Dirk Oetting, Volker Hohmann, Stephan D Ewert, Jens Ekkehart Appell
  • Publication number: 20170366904
    Abstract: An apparatus for controlling a dynamic compressor of a hearing aid includes a combination signal analyzer for determining the binaural similarity of a left and right audio signal and an amplification adjuster for providing an amplification value for a band of the left or right audio signal in dependence on the binaural similarity and a level of the left or right audio signal in the band.
    Type: Application
    Filed: August 30, 2017
    Publication date: December 21, 2017
    Inventors: Dirk OETTING, Volker HOHMANN, Stephan D. EWERT, Jens Ekkehart APPELL
  • Publication number: 20060087380
    Abstract: A method for limiting the dynamic range of audio signals (S) provides for control of the dynamic range limiting on the basis of the instantaneous frequency of the audio signal (S) which is to be compressed as a control parameter.
    Type: Application
    Filed: September 12, 2005
    Publication date: April 27, 2006
    Inventor: Volker Hohmann
  • Publication number: 20060074694
    Abstract: A method for extracting periodic signal components from at least one superimposed signal has the following steps: the superimposed signal is split into subsegments of the same period lengths (T1, T2, . . . , Tn) for a respective set of predefined period lengths (T1, T2, . . . , Tn), and for each period length (T1, T2, . . . , Tn) a superimposition of the signal values of the respective subsegments is formed.
    Type: Application
    Filed: September 12, 2005
    Publication date: April 6, 2006
    Inventor: Volker Hohmann
  • Patent number: 7013015
    Abstract: For reducing feedback-conditioned oscillations in a hearing aid device, microphone signals of a first microphone and of a distanced, second microphone are compared to one another. When oscillations are detected at the same frequency in both microphone signals, these oscillations are determined to be useful (non-feedback) tonal signals. Oscillations that are only present in one of the microphone signals, in contrast, are feedback-conditioned and are suppressed using suitable measures.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: March 14, 2006
    Assignee: Siemens Audiologische Technik GmbH
    Inventors: Volker Hohmann, Volkmar Hamacher, Inga Holube, Birger Kollmeier, Thomas Wittkop
  • Publication number: 20020176594
    Abstract: For reducing feedback-conditioned oscillations in a hearing aid device, microphone signals of a first microphone and of a distanced, second microphone are compared to one another. When oscillations are detected at the same frequency in both microphone signals, these oscillations are determined to be useful (non-feedback) tonal signals. Oscillations that are only present in one of the microphone signals, in contrast, are feedback-conditioned and are suppressed using suitable measures.
    Type: Application
    Filed: March 1, 2002
    Publication date: November 28, 2002
    Inventors: Volker Hohmann, Volkmar Hamacher, Inga Holube, Birger Kollmeier, Thomas Wittkop
  • Patent number: 6198830
    Abstract: In a method and circuit for the amplification of input signals of a hearing aid, a compression of the signals picked up by the hearing aid ensues in a AGC circuit dependent on the acquirable signal level. For assuring a dynamics compression, the method and circuit implement a signal analysis for the recognition of the acoustic situation in addition to the acquisition of the signal level of the input signal, and the behavior of the dynamics compression is adaptively varied on the basis of the result of the signal analysis. A fixed input-output characteristic that is usually defined on the basis of stationary signals forms the basis of parameter settings of a dynamics compression has been used in conventional calculations. The resulting time behavior for the compensation of input signals by a hearing aid exhibits an effectively different compression given time-variable, modulated signals, particularly given speech. The result is that the compression parameters are not optimally set for all signals.
    Type: Grant
    Filed: January 29, 1998
    Date of Patent: March 6, 2001
    Assignee: Siemens Audiologische Technik GmbH
    Inventors: Inga Holube, Volker Hohmann, Birger Kollmeier
  • Patent number: 5895520
    Abstract: The exhaust gas stream is passed through a bed of a granular adsorbent for separating noxious substances. The bed consists of the mixture of a granular high-carbon material and a granular inert material. The bulk density of the inert material is 0.8 to 3 times the bulk density of the carbonaceous material. Preferably, the content of the high-carbon material in the bed is 5 to 80 wt-%. The high-carbon material may for instance be activated carbon, activated coke or lignite coke. As inert material there may for instance be used siliceous rock, pumice, lava, slag, vitrification residues or fine gravel.
    Type: Grant
    Filed: July 22, 1997
    Date of Patent: April 20, 1999
    Assignee: Metallgesellschaft Aktiengesellschaft
    Inventors: Dietrich Rolke, Volker Hohmann, Hans-Jochen Fell
  • Patent number: 4902728
    Abstract: In a surgical composition comprising a liquid monomeric and powdered polymeric acrylate or methacrylate, a catalyst and an accelerator, the composition upon mixing of the liquid and powdered constituents passing through a plastic state to a solid state, the improvement which comprises including in the composition about 1 to 15% by weight of dimethyl sulfoxide. The product exhibits reduced cytotoxicity.
    Type: Grant
    Filed: November 8, 1988
    Date of Patent: February 20, 1990
    Assignee: Beiersdorf Aktiengesellschaft
    Inventors: Hanns Pietsch, Karl G. Doppler, Barbara Krug, Wolfgang Meyer-Ingold, Ingrid Wesselkamp, Volker Hohmann, Ernst-Joachim Henssge, Andre Ljutow
  • Patent number: 4588583
    Abstract: Surgical material based on liquid monomeric and pulverulent polymeric acrylates and/or methacrylates, catalysts, accelerators and, if appropriate, customary additives, which passes via a plastic state into the solid state by mixing of the liquid and pulverulent components, and which contains 1-15% by weight, based on the total weight, of one or more non-toxic, liquid aliphatic, saturated mono-, di- or tri-carboxylic acids with 1-6 carbon atoms and, if appropriate, 1 or 2 hydroxyl groups, completely or partially esterified with mono-, di- or tri-hydric alcohols with 1-4 carbon atoms, or liquid ethylene glycols or 1,2- or 1,3-propylene glycols with in each case 2 to about 30 glycol units, these liquids having a boiling point above 100.degree. C., preferably above 150.degree. C.
    Type: Grant
    Filed: October 25, 1983
    Date of Patent: May 13, 1986
    Assignee: Beiersdorf Aktiengesellschaft
    Inventors: Hanns Pietsch, Volker Hohmann, Detlef Kluck
  • Patent number: 4486488
    Abstract: A composition which is particularly useful in semi-rigid medical supporting bandages comprising10 to 35% zinc oxide2 to 15% cellulose ether10 to 35% glycerin30 to 75% water.The composition is coated onto at least one side of a suitable substrate to form the bandage and is irradiated in order to preserve sterility. Preferably, the radiation would take place after the bandages have been packaged.
    Type: Grant
    Filed: March 17, 1983
    Date of Patent: December 4, 1984
    Assignee: Beiersdorf Aktiengesellschaft
    Inventors: Hanns Pietsch, Volker Hohmann
  • Patent number: 4456711
    Abstract: A powder mixture for surgical use, containing a methyl methacrylate homopolymer and/or copolymer powder, an X-ray contrast medium powder and a polymerization initiator, wherein the polymerization initiator is present as a combination product with the polymer powder or the X-ray contrast medium. This powder mixture is suitable for the preparation of surgical compositions which harden and are based on polymethyl methacrylate or its copolymers.
    Type: Grant
    Filed: July 14, 1982
    Date of Patent: June 26, 1984
    Assignee: Beiersdorf Aktiengesellschaft
    Inventors: Hanns Pietsch, Volker Hohmann, Willi Eckloff
  • Patent number: 4075282
    Abstract: A process for the impregnation of active carbon with an iodine compound in which the solution is also provided with a reducing agent preferably hydrazine or a compound capable of decomposing to produce sulfur dioxide (e.g. a sulfite or hydrogen sulfite) or solubilized sulfur dioxide. The impregnated active carbon can be used for the removal of sulfur dioxide or hydrogen sulfide from a gas stream.
    Type: Grant
    Filed: January 22, 1976
    Date of Patent: February 21, 1978
    Assignee: Laboratorium fur Adsorptionstechnik GmbH
    Inventors: Klaus Storp, Hans Wirth, Gunter Rittinger, Volker Hohmann