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| Number | Title | Issue Date |
| 8184820 | Indirect acoustic transfer control of noise A noise control system is directed to the path along which the noise is transmitted from the source of the noise being generated to the receiver of the noise in the passenger compartment of an automotive vehicle. The noise control system is deployed in a box structu... | 05/22/2012 |
| 8175286 | Recording, synthesis and reproduction of sound fields in an enclosure The invention relates to simulation of sound fields in enclosures, for instance for application in listening tests, where test subjects assess the sound quality or other sound perception characteristics of the sound field. According to a specific embodiment, the sys... | 05/08/2012 |
| 8170227 | Noise control device A noise control device includes: four or more noise detectors each for detecting a plurality of noises arriving thereat, and outputting the noises as a noise signal; a control speaker for radiating, to a control point, a control sound based on each noise signal; and... | 05/01/2012 |
| 8150055 | Active noise control system and active vibration control system An active noise control system includes a filter coefficient updating unit including an imaginary term estimator. The imaginary term estimator estimates an imaginary term Ie from a real term Re of an error signal e supplied from a microphone. The filter coefficient ... | 04/03/2012 |
| 8144889 | Noise control system using smart materials A noise control system operable within a box-like structure provided by the dual bulkhead plenum of the vehicle dashboard positioned within the transfer path along which the noise is being transmitted from the source of the generated noise to the receiver of the noi... | 03/27/2012 |
| 8111834 | Vehicular active noise control system A frequency detecting circuit estimates the frequency fp of a propeller shaft based on the frequency fc of vehicle speed pulses, and calculates a control frequency fp′ which is a harmonic of the frequency fp. A basic signal generator generates a basic cosine wave ... | 02/07/2012 |
| 8111835 | Active noise control apparatus A subtractor subtracts an echo canceling signal from a canceling error signal to estimate the resonant noise to be silenced at a position of a microphone, and outputs a first basic signal representing the estimated resonant noise as an input signal supplied to a con... | 02/07/2012 |
| 8098837 | Active noise control apparatus A subtractor subtracts an echo canceling signal Ĉ·y1(n−1) from a canceling error signal e(n) to estimate a residual noise to be silenced at the position of a microphone, and outputs a first basic signal x1(n) representing the residual... | 01/17/2012 |
| 8098836 | Active vibratory noise control apparatus When the frequency of an engine rotation signal reaches a predetermined frequency, a comparator of a switching unit outputs a switching control signal to selectors and a filter coefficient updater. Based on the switching control signal, the selector switches from a ... | 01/17/2012 |
| 8064612 | Vehicular active vibratory noise control apparatus A subtractor subtracts a first control signal output from a first bandpass filter from an error signal, and supplies a differential signal to a second bandpass filter. The second bandpass filter, which has a central frequency of 70 Hz, is affected by an operation of... | 11/22/2011 |
| 8045725 | Vehicle interior active noise cancellation A vehicle has an electric drive mode, a body defining a vehicle interior, a first and second set of audio speakers positioned outside and inside of the interior, respectively, and a controller. The controller generates an acoustic signal, broadcasts the acoustic sig... | 10/25/2011 |
| 8036396 | Vehicular active vibratory noise control apparatus A vehicular active vibratory noise control apparatus includes an adaptive notch filter (second control signal generating unit) for generating a corrected error signal representative of a road noise only by removing the component of a rotational frequency (the compon... | 10/11/2011 |
| 8031877 | In-vehicle communication system An in-vehicle communication system includes a control unit which locates coupling points of each one of active speaker units to in-vehicle network. The plurality of the active speaker units includes a plurality of acoustic characteristics set data and programs for d... | 10/04/2011 |
| 8027484 | Active vibration noise controller Microphone is arranged at an evaluation point at the front seat; a signal for controlling vibration noise at this position is sent out from speaker at the front seat; secondary sound for canceling an influence of secondary sound at the front seat on the rear seat is... | 09/27/2011 |
| 8005235 | Multi-chamber noise control system A noise control system is operable within a box-like structure provided by the dual bulkhead plenum of the vehicle dashboard positioned within the transfer path along which the noise is being transmitted from the source of the generated noise to the receiver of the ... | 08/23/2011 |
| 7876910 | Vehicular active noise/vibration/sound control system, and vehicle incorporating such system An active noise/vibration/sound control system for a vehicle has an ANC (active noise control apparatus), an AVC (active vibration control apparatus), and an ASC (active sound control apparatus). To prevent the ANC, the AVC, and the ASC from interfering with each ot... | 01/25/2011 |
| 7873173 | Active vibratory noise control apparatus A cosine wave over one period is stored as waveform data in a memory, and address shift values based on a phase lag in transfer characteristics from a speaker to a microphone are stored in a memory. An address shift value is read from the memory by referring to the ... | 01/18/2011 |
| 7620188 | Cylinder responsive vibratory noise control apparatus An active vibratory noise control apparatus reduces vibratory noise which is produced in the passenger compartment of a vehicle based on vibratory noise generated by a variable-cylinder internal combustion engine that can selectively be operated in a full-cylinder o... | 11/17/2009 |
| 7616768 | Vehicle accessory microphone having mechanism for reducing line-induced noise A microphone assembly includes one or more transducers positioned in one or more housings. A processing circuit is coupled to the transducer for outputting an electrical signal such that the microphone in combination with the processing circuit very effectively canc... | 11/10/2009 |
| 7438263 | Optimal aircraft window shape for noise control A window for a subsonic passenger aircraft that provide maximum optical visibility while minimizing the amount of exterior acoustic noise transmitted through the windows to the passenger cabin during flight of the aircraft includes at least one substantially transpa... | 10/21/2008 |
| 7440578 | Vehicle-mounted three dimensional sound field reproducing silencing unit A vehicle-mounted three dimensional sound signal reproducing•silencing unit includes at least two speakers disposed for each of seats to be occupied by listeners so as to generate a three dimensional sound field space in a region inclusive of left and right extern... | 10/21/2008 |
| 7372654 | Noise reduction system, disk storage unit, hard disk drive and noise reduction method An active noise canceller outputs a noise pattern learning request signal to a hard disk drive causing the hard disk drive to perform a predetermined operation, receives noise at this moment through a sound-receiving unit, and stores, in a nonvolatile memory unit, a... | 05/13/2008 |
| 7373262 | Method for implementing vibration suppression system under control from a remote site A method of implementing vibration suppression at equipment residing at a local site includes the steps of transmitting a prompt from a remote site to the local site, automatically sensing vibration response information from the equipment in response to the prompt, ... | 05/13/2008 |
| 7362658 | Insect repelling system using feedback An insect repelling system includes (1) a microphone for converting pressure waves generated by a flying insect flapping its wings into electrical signals, and (2) a speaker for generating pressure waves toward the flying insect based on the electrical signals. ... | 04/22/2008 |
| 7357220 | Systems and methods for controlling acoustical damping A control system (10) controls a variable acoustical damping device (20) disposed in a sound producing channel (5) of a vehicle engine (1). The control system includes a controller (12) and a selection device (14). The contr... | 04/15/2008 |
| 7352869 | Apparatus for and method of actively controlling vibratory noise, and vehicle with active vibratory noise control apparatus The filter coefficients of an adaptive notch filter are sequentially updated to minimize an error signal based on the error signal and a first reference signal which is produced by subtracting a signal which represents the product of a sine corrective value C1 | 04/01/2008 |
| 7340064 | Active noise control system An active noise control system is provided which cancels a noise using a secondary noise from a speaker that is operated in accordance with an output from an adaptive controller. The system is configured such that microphone monitor interrupts a switch to thereby st... | 03/04/2008 |
| 7340065 | Active noise control system An active noise control system is provided which cancels a noise using a sound radiated from a speaker driven by an output from an adaptive notch filter. The system employs output signals from an adder or simulation cosine-wave and sine-wave signals, an error signal... | 03/04/2008 |
| 7327849 | Energy density control system using a two-dimensional energy density sensor A system and method of reducing noise in an enclosure is disclosed. The method includes receiving at least one reference signal; receiving pressure signals from no more than two substantially orthogonally placed pairs of acoustic sensors, where one pair of acoustic ... | 02/05/2008 |
| 7317801 | Active acoustic noise reduction system An active acoustic noise reduction system which comprises a single input transducer and an output actuator that are physically located next to each other in the same location. In one embodiment, the input transducer and the output actuator are a hybrid represented b... | 01/08/2008 |
| 7305094 | System and method for actively damping boom noise in a vibro-acoustic enclosure A system and method for actively damping boom noise within an enclosure such as an automobile cabin. The system comprises an acoustic wave sensor, a motion sensor, an acoustic wave actuator, a first electronic feedback loop, and a second electronic feedback loop. Th... | 12/04/2007 |
| 7302062 | Audio enhancement system An audio enhancement system for compensating for ambient noise in a listening environment, comprises an audio system that produces an electrical sound signal and generates a sound output from the electrical sound signal. A sensor (e.g., a microphone) senses a total ... | 11/27/2007 |
| 7292502 | Systems and methods for producing a sound pressure field The invention provides, in various embodiments, a transducer for generating hyper-directional sound beams, and a system and method employing a hyper-directional sound transducer for producing pressure gradients and forces across stationary and moving objects. ... | 11/06/2007 |
| 7289635 | Structural noise source predictor A method and system for determining locations in a design of an assembly likely to result in buzz, rattle, squeak (“BSR”), and/or other noise conditions. The invention uses a finite element model to represent a design. BSR effects are predicted based upon analys... | 10/30/2007 |
| 7254240 | Active noise control system An active noise control system is capable of canceling out noise in the passenger compartment of a vehicle based on low-frequency road noise. The active noise control system has a feed-forward control unit for being supplied with reference signals highly correlated ... | 08/07/2007 |
| 7253746 | Vehicle-presence notifying apparatus and vehicle-presence notifying method An apparatus for notifying presence of a vehicle to a periphery of the vehicle includes a control unit that controls an operating unit that operates to cause the vehicle to drive, generating an operation sound; a judging unit that judges whether it is necessary to n... | 08/07/2007 |
| 7231052 | Vibration-isolating and sound isolating system for vehicle An engine is supported on a vehicle body frame through an active vibration-isolating device. The vibration of the engine is prevented from being transmitted to the vehicle body frame by controlling the active vibration-isolating device. A speaker is disposed within ... | 06/12/2007 |
| 7224981 | Speech recognition of mobile devices Speech recognition in mobile processor-based devices may be improved by using location information. Location information may be derived from on-board hardware or from information provided remotely. The location information may assist in a variety of ways in improvin... | 05/29/2007 |
| 7225062 | Device for indicating the vibration level of a vehicle A device for indicating at least a first vibration level VIB1 derived from a first acceleration signal γ1 includes: first analysis element FT1 for resolving the first acceleration signal γ1 into a plur... | 05/29/2007 |
| 7222002 | Vibration engine monitoring neural network object monitoring The present invention provides an aircraft engine vibration system that provides information about engine health. Embodiments of the present invention monitor for excessive vibration, monitor for bird strike, monitor for ice build up on the fan section, and monitor ... | 05/22/2007 |
