|
Match
|
Document |
Document Title |
|
|
7471798 |
Microphone array having a second order directional pattern
A directional microphone system is disclosed, which comprises circuitry for low pass filtering a first order signal, and circuitry for high pass filtering a second order signal. The system further...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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)...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
3914731 |
Acoustic wavefront processor
A low frequency sonar beamformer system is described utilizing both frequy scaling and velocity scaling. The system is characterized by the use of frequency adding in the frequency scaling section,...
|
|
|
3905009 |
Transducer array scanning system
A scanning system for use in a torpedo homing device having a planar trancer array that produces steerable sum or difference beam patterns of desired shape which are continuously scanned across the...
|
|
|
3441900 |
SIGNAL DETECTION,IDENTIFICATION,AND COMMUNICATION SYSTEM PROVIDING GOOD NOISE DISCRIMINATION
|
|
|
3089118 |
Passive sonar detection and bearing system
|
|
|
2977570 |
Electronic commutator for sonar systems
|