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Leonid Litvak Phones & Addresses

  • Bellevue, WA
  • 842 Mansfield Ave, Los Angeles, CA 90038 (323) 461-3911
  • 853 Formosa Ave, Los Angeles, CA 90046 (323) 932-6596
  • West Hollywood, CA
  • 10 Scottfield Rd, Allston, MA 02134 (617) 739-9736
  • Brighton, MA
  • Houston, TX
  • Sugar Land, TX

Work

Position: Professional/Technical

Resumes

Resumes

Leonid Litvak Photo 1

Vice President Of Neuro-Engineering

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Location:
Los Angeles, CA
Industry:
Biotechnology
Work:
Medtronic
Vice President of Neuro-Engineering

Advanced Bionics Jun 2017 - Jun 2017
Director and Senior Director, Hearing Performance Research

Advanced Bionics Jan 2007 - Apr 2013
Scientist Fellow

Advanced Bionics Jan 2006 - Jan 2007
Principal Scientist

Advanced Bionics Jan 2005 - Jan 2006
Principal Systems Engineer
Education:
Massachusetts Institute of Technology 1995 - 2001
Doctorates, Doctor of Philosophy, Biomedical Engineering
Harvard Medical School 1995 - 2001
Doctorates, Doctor of Philosophy, Electrical Engineering
Rice University 1992 - 1995
Bachelors, Bachelor of Arts, Bachelor of Science, Electrical Engineering, Applied Mathematics
Skills:
Signal Processing
Biomedical Engineering
Medical Devices
Matlab
C
Software Development
Embedded Systems
Algorithms
Design Control
Cochlear Implants
R&D
Fda
Cross Functional Team Leadership
Biotechnology
R
Product Development
Simulations
Neural Stimulation
Electrophysiology
Design of Experiments
Life Sciences
Statistics
Neural Recording
Embedded Programming
Leonid Litvak Photo 2

Leonid Litvak

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Leonid Litvak Photo 3

Leonid Litvak

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Leonid Litvak Photo 4

Leonid Litvak

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Publications

Us Patents

Forward Masking Method For Estimating Neural Response

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US Patent:
7171261, Jan 30, 2007
Filed:
Dec 19, 2003
Appl. No.:
10/741410
Inventors:
Leonid M Litvak - Los Angeles CA, US
Edward H Overstreet - Valencia CA, US
Assignee:
Advanced Bionics Corporation - Valencia CA
International Classification:
A61B 5/04
US Classification:
600544
Abstract:
An improved forward-masking method of recording and processing neural responses (“NR”) is provided, wherein the method does not assume a linear system response and does not assume a linear response at the interface between electrodes and tissue. The method of the present invention cancels out non-linearities and/or system hysteresis. Other artifacts such as system cross-talk between stimulation and recording circuits are also canceled out.

Outer Hair Cell Stimulation Model For The Use By An Intra—Cochlear Implant

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US Patent:
7242985, Jul 10, 2007
Filed:
Dec 3, 2004
Appl. No.:
11/003155
Inventors:
Gene Y. Fridman - Santa Clarita CA, US
Leonid M. Litvak - Los Angeles CA, US
Assignee:
Advanced Bionics Corporation - Sylmar CA
International Classification:
A61N 1/00
A61B 5/04
US Classification:
607 56, 607 55, 607 57, 607137, 600379
Abstract:
Contrast between various frequency components of sound is enhanced through a lateral suppression strategy to provide increased speech perception in the electrically stimulated cochlea. A received audio signal is divided into a plurality of input signals, wherein each input signal is associated with a frequency band. A plurality of envelope signals are generated by determining the envelope of each of a plurality of the input signals. At least one of the envelope signals is scaled in accordance with a scaling factor to generate at least one scaled envelope signal. An output signal is generated by combining at least one envelope signal with at least one scaled envelope signal, and the cochlea is stimulated based on the generated output signal. The lateral suppression strategy can be applied to one or more frequency bands using scaled amplitude signals associated with one or more neighboring frequency bands.

Optimizing Pitch And Other Speech Stimuli Allocation In A Cochlear Implant

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US Patent:
7251530, Jul 31, 2007
Filed:
Dec 9, 2003
Appl. No.:
10/731050
Inventors:
Edward H Overstreet - Stevenson Ranch CA, US
Leonid M Litvak - Los Angeles CA, US
William Vanbrooks Harrison - Valencia CA, US
Assignee:
Advanced Bionics Corporation - Valencia CA
International Classification:
A61N 1/00
A61B 5/12
US Classification:
607 55, 607137, 73585
Abstract:
Errors in pitch (frequency) allocation within a cochlear implant are corrected in order to provide a significant and profound improvement in the quality of sound perceived by the cochlear implant user. In one embodiment, the user is stimulated with a reference signal, e. g. , the tone “A” (440 Hz) and then the user is stimulated with a probe signal, separated from the reference signal by an octave, e. g. , high “A” (880 Hz). The user adjusts the location where the probe signal is applied, using current steering, until the pitch of the probe signal, as perceived by the user, matches the pitch of the reference signal, as perceived by the user. In this manner, the user maps frequencies to stimulation locations in order to tune his or her implant system to his or her unique cochlea.

Encoding Fine Time Structure In Presence Of Substantial Interaction Across An Electrode Array

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US Patent:
7277760, Oct 2, 2007
Filed:
Nov 5, 2004
Appl. No.:
10/981944
Inventors:
Leonid Michael Litvak - Los Angeles CA, US
Lakshmi Narayan Mishra - Valencia CA, US
Assignee:
Advanced Bionics Corporation - Sylmar CA
International Classification:
H04R 25/00
A61N 1/36
US Classification:
607 56
Abstract:
A method for reducing the effects of decreased resolution in a cochlear implant worn by an individual includes 1) determining the value of the individual's resolution region, 2) analyzing a plurality of dominant components within a sound signal, 3) removing a component that has lesser associated energy of two or more components that are within the resolution region of one another, thereby producing a sound signal with a reduced pattern of components, and 4) transmitting the reduced pattern signal to an array of electrodes associated with the cochlear implant.

Method Of Measuring Neural Responses

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US Patent:
7283877, Oct 16, 2007
Filed:
Dec 19, 2003
Appl. No.:
10/741409
Inventors:
Leonid M Litvak - Los Angeles CA, US
Edward H Overstreet - Valencia CA, US
Assignee:
Advanced Bionics Corporation - Valencia CA
International Classification:
A61N 1/00
US Classification:
607 67, 607 46, 607 62
Abstract:
A new method of recording and processing neural responses (“NR”) is provided, wherein the method does not assume a linear system response and does not assume a linear response at the interface between electrodes and tissue. The method of the present invention cancels out non-linearities and/or system hysteresis. Other artifacts such as system cross-talk between stimulation and recording circuits are also canceled out. The method provided uses at least two stimulating electrodes simultaneously in one recording step.

Methods And Systems For Fitting A Cochlear Implant To A Patient

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US Patent:
7292892, Nov 6, 2007
Filed:
Nov 16, 2004
Appl. No.:
10/989521
Inventors:
Leonid M. Litvak - Los Angeles CA, US
Lakshmi N. Mishra - Valencia CA, US
Assignee:
Advanced Bionics Corporation - Valencia CA
International Classification:
A61N 1/00
A61B 5/00
US Classification:
607 57, 607 55, 607 56, 607137, 600559
Abstract:
An exemplary method of fitting a coeblear implant system to a patient includes establishing an implant fitting line having a slope and a position. The implant fitting line represents a relationship between a number of stimulation sites within a cochlea of the patient and a number of corresponding audio frequencies. That is, the implant fitting line defines which locations along the length of the cochlea, when stimulated, are perceived by the patient as specific tones or frequencies. The method further includes presenting a first audio signal having a number of audio frequencies to the patient and applying a stimulus current to one or more stimulation sites corresponding to the number of audio frequencies of the first audio signal. The method further includes adjusting the slope of the fitting line based on a response of the patient to the stimulus current.

Method And System To Convey The Within-Channel Fine Structure With A Cochlear Implant

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US Patent:
7317945, Jan 8, 2008
Filed:
Nov 13, 2003
Appl. No.:
10/712078
Inventors:
Leonid M. Litvak - Los Angeles CA, US
David A. Krubsack - Saugus CA, US
Edward H. Overstreet - Stevenson Ranch CA, US
Assignee:
Advanced Bionics Corporation - Valencia CA
International Classification:
A61N 1/00
US Classification:
607 57, 704214
Abstract:
The present invention provides a cochlear stimulation system and method for capturing and translating fine time structure (“FTS”) in incoming sounds and delivering this information spatially to the cochlea. The system comprises a FTS estimator/analyzer and a current navigator. An embodiment of the method comprises analyzing the incoming sounds within a time frequency band, extracting the slowly varying frequency components and estimating the FTS to obtain a more precise dominant FTS component within a frequency band. After adding the fine structure to the carrier to identify a precise dominant FTS component in each analysis frequency band (or stimulation channel), a stimulation current may be “steered” or directed, using the concept of virtual electrodes, to the precise spatial location (place) on the cochlea that corresponds to the dominant FTS component. This process is simultaneously repeated for each stimulation channel and each FTS component.

Methods And Systems For Automatically Determining A Neural Response Threshold Current Level

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US Patent:
7343200, Mar 11, 2008
Filed:
Jun 1, 2005
Appl. No.:
11/141825
Inventors:
Leonid M. Litvak - Los Angeles CA, US
Gulam Emadi - Valencia CA, US
Edward H. Overstreet - Valencia CA, US
Assignee:
Advanced Bionics, LLC - Valencia CA
International Classification:
A61N 1/05
US Classification:
607 2, 607 56, 607117
Abstract:
Methods of automatically determining a neural response threshold current level include identifying one or more neural response signals at one or more corresponding stimulation current levels, identifying one or more non-response signals at one or more corresponding stimulation current levels, and analyzing a trend between the neural response signals and the non-response signals. Systems for automatically determining a neural response threshold current level include one or more devices configured to identify one or more neural response signals at one or more corresponding stimulation current levels, identify one or more non-response signals at one or more corresponding stimulation current levels; and analyze a trend between the neural response signals and the non-response signals.
Leonid M Litvak from Bellevue, WA, age ~51 Get Report