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| Number | Title | Issue Date |
| 8107321 | Joint position-pitch estimation of acoustic sources for their tracking and separation The invention relates to a method for localizing and tracking acoustic sources (101) in a multi-source environment, comprising the steps of recording audio-signals (103) of at least one acoustic source (101) with at least two recording means ( | 01/31/2012 |
| 7787328 | System and method for computing a location of an acoustic source In accordance with the present invention, a system and method for computing a location of an acoustic source is disclosed. The method includes steps of processing a plurality of microphone signals in frequency space to search a plurality of candidate acoustic source... | 08/31/2010 |
| 7738319 | Determining angles of arrival using multipaths In one aspect, a method to determine multipath angles of arrival includes performing an autocorrelation on a first signal received at a first received beam from a signal source, performing a cross-correlation between the first signal and a second signal received at ... | 06/15/2010 |
| 7626889 | Sensor array post-filter for tracking spatial distributions of signals and noise A “Sensor Array Post-Filter” provides an adaptive post-filter that accurately models and suppresses both diffuse and directional noise sources as well as interfering speech sources. The post-filter is applied to an output signal produced by a beamformer used to ... | 12/01/2009 |
| 7529153 | Positional information detecting method and device In a positional information detecting device, a tone-burst signal propagating unit causes a tone-burst signal to propagate through a path. The tone-burst signal is composed of a continuous wave train, the continuous wave train including a plurality of cycles of a co... | 05/05/2009 |
| 7400142 | Dynamic magnetic anomaly compensation An array of three-axis magnetometers used for dynamic magnetic anomaly compensation are located at the corners of a parallelopiped, with pairs of magnetometer outputs used to derive a magnetic anomaly gradient vector used to compensate a compass and/or the output of... | 07/15/2008 |
| 7362258 | Transponder detection system using radio and light wave signals A target object detection system for detecting a target object using a detector and a tag on the target object; the tag includes a radio wave receiver receiving radio wave from the detector; a light receiver receiving a light signal from the detector; a receipt sign... | 04/22/2008 |
| 7342276 | Method and apparatus utilizing monocrystalline insulator A semiconductor device, including: a semiconductor material; a conductive element; and a substantially monocrystalline insulator disposed between the semiconductor material and the conductive eleme... | 03/11/2008 |
| 7333622 | Dynamic binaural sound capture and reproduction A new approach to capturing and reproducing either live or recorded three-dimensional sound is described. Called MTB for “Motion-Tracked Binaural,” the method employs several microphones, a head tracker, and special signal-processing procedures to combine the si... | 02/19/2008 |
| 7331578 | Sheet feeding device and method for detecting overlapping sheets A sheet feeding device includes a stacker on which sheets are placed, a sheet feeding device for separating and feeding a sheet from other sheets on the stacker, a sheet overlap sensing device placed in a sheet conveying path at a downstream side of the sheet feedin... | 02/19/2008 |
| 7319636 | Calibration of pressure gradient recordings A method for computing a pressure signal gradient. The method includes recording a plurality of pressure signals at least one of a first receiver and a second receiver. The first receiver and the second receiver are disposed within a cluster. The method further incl... | 01/15/2008 |
| 7315488 | Methods and systems for passive range and depth localization A to method and system provide a range and depth localization of a passive sound generator, e.g., a submarine target. The method and system use an autocorrelation and/or a cross correlation to arrive at a plurality of range versus depth estimates, which are resolved... | 01/01/2008 |
| 7304911 | Underwater location apparatus Measuring apparatus for providing information on the relative location of a target site which is radiating a target signal that includes a predetermined pulse signal, comprises receiver means for providing a pair of temporally spaced output pulses in response to a s... | 12/04/2007 |
| 7292666 | Time difference adjustment circuit In a first stage, each of level detection circuits compares a transmission signal and a first reference voltage Vr1 to detect a rising edge, and phase difference detection circuits detect phase differences between the level detection circuits. In a second sta... | 11/06/2007 |
| 7289391 | Narrowband phase difference measurement technique for sonar applications The present invention is directed to a sonar system that includes a transmitter configured to direct multi-frequency transmit signals into a propagation channel. Each multi-frequency transmit signal includes a first frequency and a second frequency. A receiver is tu... | 10/30/2007 |
| 7280920 | Method and apparatus for forecasting earthquakes and making informed risk management decisions A data-driven method and system to forecast earthquakes worldwide over a broad range of time (from days to years in advance). The system includes the compilation of a diverse set of historical geophysical and environmental databases, a program that determines correl... | 10/09/2007 |
| 7270325 | Sheet feeding apparatus, image reading apparatus, and method of detecting double feed A sheet feeding apparatus includes first and second transport devices disposed at a transport guide with a distance in between for nipping and transporting a sheet, and a double feed detection device disposed between the first transport device and the second transpo... | 09/18/2007 |
| 7272073 | Method and device for generating information relating to the relative position of a set of at least three acoustic transducers The invention relates to a method and device for generating data about the mutual position of at least three acoustic transducers. The aim of the invention is to make it possible to continuously measure and calculate the mutual position of at least three acoustic tr... | 09/18/2007 |
| 7248540 | Dual channel delay sensing circuit A circuit coupled to an array antenna, such as a sonar transducer array, for measuring the angle of orientation of an incident wave of radiation is formed of first and second channels coupled to respective portions of the antenna to sense delays between signals of t... | 07/24/2007 |
| 7231051 | Detection of viewing direction by microphone A method for detecting of a viewing direction of a person includes sensing a speech signal originating from the person using at least one direction-selective microphone so as to produce a microphone signal, detecting the speaking direction of the person using the mi... | 06/12/2007 |
| 7227346 | Two channel digital phase detector The invention is directed to a digital phase detector that comprises a splitter and phase shifter to receive a signal of a device under test and produce a first signal that is substantially identical to the received signal and a second signal that is phase shifted r... | 06/05/2007 |
| 7225262 | System and method for selecting an external user interface using spatial information A method and system for selecting an external user interface using spatial information is described. In one configuration the floor space of a mailroom is mapped using a two dimensional grid. At least one machine is located on the mapped grid and an associated contr... | 05/29/2007 |
| 7221622 | Speaker distance detection apparatus using microphone array and speech input/output apparatus There are provided a speaker distance detection apparatus and method using a microphone array, capable of exactly detecting the distance between a speaker and even a small terminal such as a mobile telephone, and a speech input/output apparatus using the method. The... | 05/22/2007 |
| 7215785 | Passive sound telemetry system and method and operating toy using the same A passive sound telemetry system and method is provided, in which phase differences are calculated for every pulse from acoustic signals received via three or six acoustic receivers, to measure a distance and angle with respect to a sound source. The system is appli... | 05/08/2007 |
| 7195069 | Method and apparatus for backing off a tubular member from a wellbore A back-off tool for use in a tubular member disposed inside a wellbore. The back-off tool includes a housing and at least one sonic wave generator mounted within the housing. The sonic wave generator is configured to generate a plurality of sonic waves. ... | 03/27/2007 |
| 7193617 | Acoustic contact detecting device An object of the present invention is to provide a coordinate input device of touch-type capable of giving an electric signal to a transducer, even if a piezoelectric vibrator having electrodes on both surfaces thereof is employed. A device according to the p... | 03/20/2007 |
| 7187369 | Acoustic touch sensor A coordinate input device of touch-type capable of giving an electric signal to a transducer, even if said transducer is disposed on a back surface of a substrate. The device contains acoustic wave transducers (piezoelectric vibrators), each functioning for oscillat... | 03/06/2007 |
| 7181247 | Globally referenced positioning in a shielded environment A method, apparatus and system for globally referenced positioning in a shielded environment includes integrating and correlating information from a UWB receiver, a GPS receiver, and a bent-path GPS receiver adapted to extract a GPS radio frequency wave from a heter... | 02/20/2007 |
| 7181356 | Device and method for analyzing the structure of a material The invention relates to a device that is used to analyse the structure of a material. The inventive device comprises: probe elements (5) which are used to (i) emit a wave, in the material, with emission delay laws that correspond to several simultaneous devi... | 02/20/2007 |
| 7172195 | Image reading apparatus A sheet feeding apparatus includes a stacker for stacking a sheet; a sheet separating device for sequentially separating and feeding the sheet stacked on the stacker; a sheet transport guide for guiding the sheet from the separating device to a processing position; ... | 02/06/2007 |
| 7171007 | Signal processing system A signal processing system is provided which receives signals from a number of different sensors which are representative of signals generated from a plurality of sources. The sensed signals are processed to determine the relative position of each of the sources rel... | 01/30/2007 |
| 7139221 | Close range sonar system and method A system for close range sonar is provided. The system provides sufficient warning to permit maneuvering to avoid a close encounter even in the forward starboard/port regions, which have been problematic in the past due to ownship noise. The system utilizes a hull m... | 11/21/2006 |
| 7133327 | Method and system for measuring the velocity of a vessel relative to the bottom using velocity measuring correlation sonar A method and a system for measuring the velocity of a vessel relative to the bottom using a velocity measuring correlation sonar are disclosed. The present invention provides a new theoretical expression for the bottom medium sonar array temporal and spatial correla... | 11/07/2006 |
| 7130245 | Ultrasonic double feed detecting device A double feed detecting apparatus provided with an ultrasonic transmitter installed on one side of a transport path for a sheet material for transmitting an ultrasonic toward the sheet material, an ultrasonic receiver installed on the other side of the transport pat... | 10/31/2006 |
| 7121142 | Installation and method for acoustic measurement with marker microphone in space An acoustic measurement installation including acoustic measurement instrumentation, in particular an acoustic measurement antenna fitted with at least one microphone; a positioning system for positioning the antenna by ultrasound and including at least one ultrasou... | 10/17/2006 |
| 7117157 | Processing apparatus for determining which person in a group is speaking Image data from cameras showing movement of a number of people, and sound data, is archived and processed to determine the position and orientation of each person's head and to determine at whom each person is looking. The speaker is determined by determining at whi... | 10/03/2006 |
| 7113201 | Image processing apparatus Image data from a plurality of cameras 2-1, 2-2, 2-3 showing the movements of a number of people, for example in a meeting, and sound data from a directional microphone array 4 is processed by a computer processing apparatus 24 ... | 09/26/2006 |
| 7084801 | Apparatus and method for estimating the direction of arrival of a source signal using a microphone array An apparatus for estimating the direction of arrival (“DOA”) of a source signal includes microphones for transducing the source signal, amplifiers in signal communication with a corresponding one of the microphones, analog-to-digital converters in signal communi... | 08/01/2006 |
| 7071841 | Truck acoustic data analyzer system A passive vehicle acoustic data analyzer system having at least one microphone disposed in the acoustic field of a moving vehicle and a computer in electronic communication the microphone(s). The computer detects and measures the frequency shift in the acoustic sign... | 07/04/2006 |
| 7025348 | Method and apparatus for detection of multiple documents in a document scanner using multiple ultrasonic sensors An apparatus (10) for detection of multiple documents (42) in a document transport system comprises a first transmitter (13) emitting a first signal at a first interval through a document feed path (40). A first sensor (14) detects... | 04/11/2006 |
