Did You Know...
...that a workman who left the soap mixing machine on too long was responsible for making Ivory Soap? He was so embarrassed by his mistake that he threw the mess in a stream. Imagine his dismay when the evidence of his error floated to the surface! Result: Ivory soap, the soap that floats.
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| Number | Title | Issue Date |
| 7289586 | Signal processing apparatus and method A method of processing signals received from an array of sensors includes sampling and digitally converting the received signals. The digitally converted signals are processed to provide an output signal, the processing including filtering the signals using a first ... | 10/30/2007 |
| 7146011 | Steering of directional sound beams Apparatus is disclosed for steering a directional audio beam that is self-demodulated from an ultrasound carrier. The apparatus includes means for modulating a carrier signal with an audio signal and means for adjusting the amplitude and phase of at least one of the... | 12/05/2006 |
| 7109918 | Nonlinear beam forming and beam shaping aperture system This invention exploits the synchronization properties of coupled, nonlinear oscillators arrays to perform power combining, beam steering, and beam shaping. This architecture utilizes interactions between nonlinear active elements to generate beam patterns. A nonlin... | 09/19/2006 |
| 6980152 | Externally cued aircraft warning and defense Methods, computer-readable media, and systems for externally cued aircraft warning and defense are disclosed. A surveillance system may include a sensor field or array and may include a processor system that processes signals including acoustic signals received by t... | 12/27/2005 |
| 6961545 | Method and system for providing antenna diversity An antenna switch diversity algorithm, and systems and methods to provide antenna diversity by implementing the algorithm in, for example, an IEEE 802.11a compliant environment, are presented. In accordance with the algorithm, one antenna of at least two antennas is... | 11/01/2005 |
| 6950528 | Method and apparatus for suppressing an acoustic interference signal in an incoming audio signal In order to suppress at least one interference signal in an incoming audio signal using a directional microphone system having at least two microphones, that directional microphone signal which has the lowest interference signal component is selected from two or mor... | 09/27/2005 |
| 6925189 | Hybrid adaptive beamformer The hybrid adaptive beamformer of the present invention includes a plurality of microphones for receiving sound energy from an external environment and for producing a plurality of microphone outputs from the sound energy. A processor produces a plurality of first o... | 08/02/2005 |
| 6741713 | Directional hearing device A hearing device comprising at least two microphones, a processor and an output for further processing in a reproducer, the microphones being electrically coupled to the processor, and the output for further processing in a reproducer being connected to the processo... | 05/25/2004 |
| 6540677 | Ultrasound transceiver system for remote operation through a minimal number of connecting wires An advantageous combination of preamplifier electronics and circuits for acoustic beam forming with ultrasound transducer arrays permits integration of the electronics and transducer(s) at close distances in a compact arrangement and is operable from an u... | 04/01/2003 |
| 6192134 | System and method for a monolithic directional microphone array A system and method for a directional microphone system is disclosed. The directional microphone system can adaptively track and detect sources of sound information, and can reduce background noise. A first monolithic detection unit for detecting sound in... | 02/20/2001 |
| 6192006 | Device for and a method of determining the angle of incidence of a received signal and a scanning sonar A transducer is constructed of a plurality of transducer elements which are arranged in multiple layers and columns forming as a whole a generally cylindrical shape. A scanning sonar employing the transducer thus constructed can be switched between horizo... | 02/20/2001 |
| 6154552 | Hybrid adaptive beamformer The hybrid adaptive beamformer of the present invention includes a plurality of microphones for receiving sound energy from an external environment and for producing a plurality of microphone outputs from the sound energy. A processor produces a plurality... | 11/28/2000 |
| 6052335 | Multiple-frequency sonar system A hull-mounted, multiple-frequency sonar system having a primary transduc which provides transmission power for active modes and an added array of miniature hydrophones is provided. The multiple frequency sonar system includes vertical and horizontal arr... | 04/18/2000 |
| 6049607 | Interference canceling method and apparatus Interference canceling is provided for canceling, from a target signal generated from a target source, an interference signal generated by an interference source. The beam splitter beam-splits the target signal into a plurality of band-limited target sign... | 04/11/2000 |
| 5825898 | System and method for adaptive interference cancelling An adaptive system and method for reducing interference in a signal received from an array of sensors. Adaptive filters are used to generate cancelling signals that closely approximate the interference present in the received signal. The adaptive filter w... | 10/20/1998 |
| 5627799 | Beamformer using coefficient restrained adaptive filters for detecting interference signals In an adaptive array beamformer, a spatial beamforming filter is connected to a sensor array for respectively filtering and summing array signals to produce a first filter output containing a target signal that arrives in a specified direction. First adap... | 05/06/1997 |
| 5504716 | Passive sonar transducer arrangement A passive sonar transducer arrangement includes two steerable array sections (10,11) arranged with the transducers of one section (10) spaced apart from one another by a different distance (d1) from the spacing (d2) between the transducers of the other se... | 04/02/1996 |
| 5457662 | Process and device for locating noise emitters with an antenna consisting of passive acoustic buoys The invention relates to a device for locating noise emitters with an antenna comprising passive sensors. In a preferred variant, the antenna consists of N acoustic buoys each comprising a pair of hydrophone dipoles exhibiting a double-eight directivity d... | 10/10/1995 |
| 5253221 | Null steering device A device for steering a null in a sonar beam pattern resolves first and snd beam signals into four quadrature components. These components are multiplied in multiplying digital to analog converters by binary number factors, derived in accordance with the... | 10/12/1993 |
| 5047993 | Detection and classification for multi-beam sonar systems An array of sonar transmitting and receiving transducers are so physically rranged and their signal voltage so combined as to form beams pointing to various points of the compass. In this invention a signal is formed on a different conductor for each beam ... | 09/10/1991 |
| 4980870 | Array compensating beamformer A compensating beamformer which requires orders of magnitude fewer calculations that prior art methods. A compensating beamformer is provided which comprises a plurality of sensing elements and a plurality of analog-to-digital converters, for converting i... | 12/25/1990 |
| 4970464 | Linear position-displacement magnetostrictive transducer having multiple cylindrical electromagnets for generating flux, each electromagnet having a centered passageway for relative travel along the same magnetostrictive waveguide When observing or setting changeable positions of respective movable components of a machine, such as movable saws of a multiple cut sawing machine, each linear position-displacement transducer used has the wave guide housing thereof, made of sufficient l... | 11/13/1990 |
| 4758999 | Systolic architectures for sonar processing A three-dimensional systolic architecture for beamforming according to convolve signals from an array with sets of weighting coefficients using a one dimensional array of similar modules with finite impulse response filter elements with outputs directed i... | 07/19/1988 |
| 4741038 | Sound location arrangement A signal processing arrangement is connected to a microphone array to form at least one directable beam sound receiver. The directable beam sound receivers are adapted to receive sounds from predetermined locations in a prescribed environment such as audi... | 04/26/1988 |
| 4530076 | Frequency domain non-linear signal processing apparatus and method for discrimination against non-Gaussian interference Apparatus and method for discriminating against non-Gaussian noise. Analog signals from an array of sensors are converted to real and imaginary digital representations and processed such that non-Gaussian noise is separated from signals of interest. The p... | 07/16/1985 |
| 4350917 | Frequency-controlled scanning of ultrasonic beams An ultrasonic wave transducer is formed from a body of piezoelectric material having nonuniform thickness. Each location on the transducer is resonant at a different frequency according to the thickness at that point. By changing the frequency of the appl... | 09/21/1982 |
| 4280203 | Sonar beam forming utilizing the chirp Z-transform The chirp rate in a chirp Z-transform sonar beam former is varied as a function of range to form beams in the near field. The chirp rate may be varied with each range cell under examination or with each group of range cells.... | 07/21/1981 |
| 4254417 | Beamformer for arrays with rotational symmetry A frequency-domain beamformer is used with arrays comprising M rings with a maximum of N elements per ring, the positions of the elements having rotational symmetry. An element need not be present at each position. The outputs of each of the M rings of ar... | 03/03/1981 |
| 4245333 | Beamforming utilizing a surface acoustic wave device A beamforming apparatus is provided for processing the outputs of a linear rray of spaced apart receiving elements. The beamforming apparatus includes a surface acoustic wave device which has a pair of transducers mounted on a substrate in a spaced apart r... | 01/13/1981 |
| 4244037 | Two dimensional imaging using surface wave acoustic devices An apparatus is provided for processing the outputs of a two dimensional nar array of spaced apart receiving elements. The receiving elements are grouped and spaced apart in rows, which may be horizontal and vertical however, the rows may be in other dir... | 01/06/1981 |
| 4228531 | Automatic underwater null steering Means are provided for reducing the dynamic range requirement of an underer sound system by minimizing the effects of noise interference. Computer means are provided to automatically rotate the pattern function of the combination of the dipole hydrophone... | 10/14/1980 |
| 4187490 | Range determining system Discrimination of long range targets from short range targets is provided by generating a vertical dipole beam and a narrow uni-directional horizontal beam which may be steered. Targets in the dipole beam are short range targets whose acoustic signals arr... | 02/05/1980 |
| 4179682 | Tilt compensation for acoustic transducing system A tilt compensated transducer array is provided with omni-directional transducers, compensated bi-directional transducers, and a processor which forms omni and bi-directional beams that are combined to cancel image lobes to give the array a uni-directiona... | 12/18/1979 |
| 4176339 | Propagation sampled acoustic line array An acoustic line array which includes a co-axial cable having a center coctor surrounded by a flexible material of low-electrical conductivity. The flexible material is surrounded by a conducting material protected by an external shield. The cable has ch... | 11/27/1979 |
| 4158843 | Automatic direction finder antenna preamplifier processor A relatively small directional loop antenna adapted for use in an airborne automatic direction finder (ADF) is made to perform like a physically larger loop while being broadly tuned to a mean operating frequency. The total input equivalent noise source i... | 06/19/1979 |
| 4112411 | Device for echography by means of focussed ultrasonic beams A device in which focussed ultrasonic beams are used by way of binary distribution of the phase of the signals occurring in a mosaic of transducers. The material of which the transducers are made can be polarized, which enables the prefocussing of the ult... | 09/05/1978 |
