|
Match
|
Document |
Document Title |
|
|
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 bas...
|
|
|
8045727 |
Headset power management
The invention relates to an energy saving headset 100. The headset 100 comprises a power management unit 150 that is operable to reduce the power consumption of the headset 100 when a user 110 is...
|
|
|
7925028 |
Electronic device having a blower with noise control
An electronic device having a first motor which rotates a rotating body (for example, blades) about a rotation axis and a second motor which vibrates a vibrator including the rotating body in the...
|
|
|
7864968 |
Auditory front end customization
A method and system for implementing an acoustical front end customization are disclosed. The customization is implemented to optimize the sound level for each individual cochlear implant user. A...
|
|
|
7835529 |
Sound canceling systems and methods
A system for sound cancellation includes a source microphone for detecting sound and a speaker for broadcasting a canceling sound with respect to a cancellation location. A computational module is...
|
|
|
7792312 |
Active noise control system
An active noise control system prevents a continuous muffled sound from being generated as an abnormal sound under a high sound pressure from a speaker when a microphone as a sound detector is...
|
|
|
7773760 |
Active vibrational noise control apparatus
While a vehicle incorporating an active vibration noise control apparatus is decelerating, hysteresis is given if an operating point moves from an operating point on a sampling period...
|
|
|
7711124 |
Method and device for attenuating the noise generated at the outlet of an exhaust line
A method for attenuating the low-frequency noise generated at the outlet (18) of an exhaust line (14). A signal representing the noise to be attenuated is defined; a first high-frequency acoustic...
|
|
|
7706547 |
System and method for noise cancellation
The invention is directed to a system and method for noise cancellation for an apparatus such as an electric motors or generator. The system may comprise a plurality of actuators, a plurality of...
|
|
|
7450725 |
Digital filter modeling for active noise cancellation
An active noise cancellation system (20) includes digital modeling of the physical path that is compensated for using a digital filter (34). An initial estimate of the time domain response of the...
|
|
|
7436968 |
Adaptive noise reduction method and device
An adaptive noise reduction method and apparatus capable of reducing efficiently variable period noise from a main input is provided. The pitch of a noise waveform to be reduced can be variable...
|
|
|
7430255 |
Impulse noise suppression device
Digital audio data with error detection bits added thereto is inputted to an error detecting and correcting device (4). The correcting device (4) corrects an error when the error is detected in the...
|
|
|
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...
|
|
|
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...
|
|
|
7103188 |
Variable gain active noise cancelling system with improved residual noise sensing
An active noise cancellation system includes a series of features for more effective cancellation, greater reliability, and improved stability. A particular feature adapted for headset systems...
|
|
|
6963647 |
Controlled acoustic waveguide for soundproofing
The invention relates to a controlled acoustic wave guide configured as an elongated hollow chamber (1) which via an opening (2) in its first face end (3) is connected to a sound-conducting channel...
|
|
|
6845162 |
Device for active sound control in a space
The invention refers to a device for sound control in a space (2) with a sound field from at least one sound source (3). The device includes a pulse sensor (5), which provides a pulse signal from...
|
|
|
6704428 |
Automatic turn-on and turn-off control for battery-powered headsets
Some workers wear headsets to protect their hearing from loud persistent noises, such as airplane engines and construction equipment. These headsets are generally passive or active, with the active...
|
|
|
6688422 |
Method and apparatus for actively influencing the intake noise of an internal combustion engine
A method and apparatus for actively influencing the intake noise of an internal combustion engine. The apparatus comprises a controller (7) which senses the actual noise (I) via a microphone (16)...
|
|
|
6480824 |
Method and apparatus for canceling noise in a microphone communications path using an electrical equivalence reference signal
In a technique for canceling noise from a microphone communications path, an electrical equivalence circuit which is positioned close to and electrically matched to the microphone produces a signal...
|
|
|
6459970 |
Control data setting method and data storage medium of active mount control apparatus
Control data such as an optimal filter coefficient or the like of an engine mount is obtained by adaptation control or the like with respect to a reference vehicle F provided with a reference...
|
|
|
6278958 |
Method for predicting a noise intensity emitted from a fan and or a pump
A method for predicting a noise intensity emitted from a fan is provided. The method in accordance with the present invention provides data about the performance of the fan and a noise intensity...
|
|
|
6266422 |
Noise canceling method and apparatus for the same
A noise canceler of the present invention is of the type including an adaptive filter for generating a pseudo noise signal, subtracting the pseudo noise signal from a received signal to thereby...
|
|
|
6188770 |
Fan noise canceller
A fan noise canceller comprises a rotation information detecting means 2 (or 12) for detecting noise information of a fan 1 (11), a band-pass filter 3 (13) for extracting the blade passing...
|
|
|
6002778 |
Active structural control system and method including active vibration absorbers (AVAS)
An Active Structural Control (ASC) system (10) and method which includes a plurality of Active Vibration Absorbers (AVAs) (40) attached to a yoke (32) included within a pylon structure (28)...
|
|
|
5930372 |
Communication terminal device
A communication terminal device carries out data processing based on key or touch panel operations and provides a telephone conversation function. When a key is actuated, a key input confirmation...
|
|
|
5691893 |
Adaptive control system
An adaptive control system for reducing undesired signals comprises a processor (36) which provides secondary signals for sources (37) for interference with the undesired signals. Sensors (42)...
|
|
|
5692052 |
Engine noise control apparatus
An engine rotating speed sensor detects intake sound information due to the drive of an engine. A controller generates a signal having a frequency corresponding to a desired ratio of orders based...
|
|
|
5690321 |
Vibration damping system for vehicle
A vibration damping system for a vehicle includes a vibration sensor which detects vibration of a predetermined vibrating element on the vehicle, a vibrator which vibrates the vibrating element,...
|
|
|
5636287 |
Apparatus and method for the active control of air moving device noise
Method and apparatus for the active cancellation of broad band noise and/or single frequency tones emanating from rotating machinery, such as an air moving device, by detecting related mechanical...
|
|
|
5613009 |
Method and apparatus for controlling vibration
Disclosed is a vibration control method being largely effective in vibration-proof even when a natural frequency is relatively low and its transmissibility of vibration is high and being thus...
|
|
|
5548652 |
Silencing apparatus
A silencing apparatus for effectively reducing noises in the three dimension space which detects physical characteristics of the noise source by the laser doppler sensor unit during the noise...
|
|
|
5530766 |
Noise reducing apparatus of a cyclo-fan
A noise reducing apparatus for a cyclo-fan is provided for the canceling of a whistling noise with a specific frequency, determined by the product of the rotation number of the cyclo-fan and the...
|
|
|
5511127 |
Active noise control
A system for reducing noise of a noise generator such as a fan located in a housing includes a short duct directing air to the fan housing. An input transducer is located in the duct at a position...
|
|
|
5502770 |
Indirectly sensed signal processing in active periodic acoustic noise cancellation
The system employing and the processing of, an indirectly sensed signal representative of a periodic noise acoustic wave into an input signal for a noise cancelling system where the indirectly...
|
|
|
5493616 |
Vehicle internal noise reduction system
The vehicle internal noise reduction system is characterized in being able to attenuate the internal noise sounds at a broad area of the passenger compartment by generating optimum canceling sounds...
|
|
|
5488666 |
System for suppressing sound from a flame
A system for suppressing sound from a flame comprises a detector for detecting a first signal which emanates from the flame. A photo sensor rapidly detects the noise from the flame. The first...
|
|
|
5485523 |
Active noise reduction system for automobile compartment
In an automobile compartment noise reduction system, an ignition signal transforming circuit processes an ignition pulse signal to obtain a vibration noise source signal with a frequency spectrum...
|
|
|
5455779 |
Noise reduction apparatus
When noise is caused by the mechanical vibration propagated from the engine, the microprocessor calculates from the vibration frequency of the engine the secondary sound signal which is in...
|
|
|
5446790 |
Intake sound control apparatus
A device for cancelling annoying sounds caused by operation of an internal combustion engine. An intake sound of the engine, and also a rotational speed of the engine, are obtained. The phase...
|
|
|
5427102 |
Active noise cancellation apparatus in MRI apparatus
An active noise cancellation apparatus of an MRI apparatus, including a detector for detecting vibration of a bobbin or a driving signal of a magnetism generator as a noise source signal, error...
|
|
|
5426705 |
Vehicle internal noise reduction system
In an automobile vehicle, fuel injection pulse outputted from an electronic control unit of an engine is transformed into a voltage value as a primary source. The voltage values is transformed by...
|
|
|
5426704 |
Noise reducing apparatus
A noise reducing apparatus which is particularly effective to reduce periodic noise with the construction simplified very much is disclosed. The noise reducing apparatus comprises a microphone, an...
|
|
|
5423658 |
Active noise control using noise source having adaptive resonant frequency tuning through variable ring loading
A noise source for an aircraft engine active noise cancellation system in which the resonant frequency of noise radiating structure is tuned to permit noise cancellation over a wide range of...
|
|
|
5416844 |
Apparatus for reducing noise in space applicable to vehicle passenger compartment
An apparatus for reducing periodical noises transmitted from a noise source into a vehicle passenger compartment. The apparatus comprises control sound sources for producing control sounds in the...
|
|
|
5414230 |
Silencer arrangement for combustion engines
A silencer arrangement for a combustion engine (1) whose exhaust gases are discharged via an exhaust pipe (3) comprises a microphone (9), a tachometer (11) for the engine speed, a control unit (13)...
|
|
|
5394376 |
Method and apparatus for acoustic attenuation
An apparatus for reducing acoustic radiation from an enclosure containing a fluid includes one or more vibration sensors in communication with surfaces of the enclosure. The vibration sensors feed...
|
|
|
5361303 |
Frequency domain adaptive control system
A multiple-input, multiple-output adaptive control system which utilizes perturbations to the frequency components of the outputs to determine the desired changes to said coefficients. The control...
|
|
|
5325437 |
Apparatus for reducing noise in space applicable to vehicle compartment
In an apparatus for reducing noises in a space, signals related to noise generating conditions of a plurality of noise sources are detected, a signal component of the detected signals is selected...
|
|
|
5321759 |
Active noise control system for attenuating engine generated noise
An active noise control (ANC) system is disclosed for attenuating engine generated noise that contains at least one sinusoidal noise component having an amplitude and frequency that vary with...
|