Did You Know...
...that it was melting ice cream that inspired the invention of the outboard motor? It was a lovely August day and Ole Evinrude was rowing his boat to his favorite island picnic spot. As he rowed, he watched his ice cream melt and wished he had a faster way to get to the island. At that moment the idea for the outboard motor was born!
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| Number | Title | Issue Date |
| 8175291 | Systems, methods, and apparatus for multi-microphone based speech enhancement Systems, methods, and apparatus for processing an M-channel input signal are described that include outputting a signal produced by a selected one among a plurality of spatial separation filters. Applications to separating an acoustic signal from a noisy environment... | 05/08/2012 |
| 8160273 | Systems, methods, and apparatus for signal separation using data driven techniques Methods, apparatus, and systems for source separation include a converged plurality of coefficient values that is based on each of a plurality of M-channel signals. Each of the plurality of M-channel signals is based on signals produced by M transducers in response ... | 04/17/2012 |
| 8139788 | Apparatus and method for separating audio signals An audio signal separation apparatus for separating observation signals in the time domain of a mixture of a plurality of signals including audio signals into individual signals by means of independent component analysis to produce isolated signals adapted to produc... | 03/20/2012 |
| 8130979 | Noise mitigating microphone system and method A microphone system has a base coupled with first and second microphone apparatuses. The first microphone apparatus is capable of producing a first output signal having a noise component, while the second microphone apparatus is capable of producing a second output ... | 03/06/2012 |
| 8116481 | Audio enhancement system A system for enhancing the sound signal produced by an audio system in a listening environment by compensating for ambient noise in the listening environment is provided. The system receives an electrical sound signal and generates a sound output therefrom. A total ... | 02/14/2012 |
| 8116482 | Low noise microphone for use in windy environments and/or in the presence of engine noise A microphone for use in windy environments. The microphone uses a transducer to flood the environment outside the microphone with a high frequency (such as an ultrasonic) acoustic field. The sounds desired to be detected are mixed with the high frequency carrier, an... | 02/14/2012 |
| 8000482 | Microphone array processing system for noisy multipath environments Apparatus and a corresponding method for processing speech signals in a noisy reverberant environment, such as an automobile. An array of microphones (10) receives speech signals from a relatively fixed source (12) and noise signals from multiple sourc... | 08/16/2011 |
| 7995773 | Methods for processing audio input received at an input device A method for processing an audio signal received through a microphone array coupled to an interfacing device is provided. The method is processing at least in part by a computing device that communicates with the interfacing device. The method includes receiving a s... | 08/09/2011 |
| 7983428 | Noise reduction on wireless headset input via dual channel calibration within mobile phone A communication device includes: (1) a wireless adapter at which a wireless headset is communicatively connected to the communication device and at which is received a first acoustic input that includes a speech input and a first ambient noise input; (2) a microphon... | 07/19/2011 |
| 7817808 | Dual adaptive structure for speech enhancement A clear, high quality voice signal with a high signal-to-noise ratio is achieved by use of an adaptive noise reduction scheme with two microphones in close proximity. The method includes the use of two omini directional microphones in a highly directional mode, and ... | 10/19/2010 |
| 7769189 | Preserving noise during editing of a signal Techniques for introducing background noise segments into signal data are provided. The background noise segments are constructed from a background noise print extracted from the signal data. The background noise print may be user specified, or automatically identif... | 08/03/2010 |
| 7672466 | Audio signal processing apparatus and method for the same An audio signal processing apparatus includes a splitting unit for splitting an audio signal of a first system and another audio signal of a second system into pluralities of frequency band components, a level comparing unit for calculating a level ratio or a level ... | 03/02/2010 |
| 7613310 | Audio input system A method for reducing noise associated with an audio signal received through a microphone sensor array is provided. The method initiates with enhancing a target signal component of the audio signal through a first filter. Simultaneously, the target signal component ... | 11/03/2009 |
| 7577262 | Microphone device and audio player A signal generating section generates a main signal and a noise reference signal. A determining section determines whether a level ratio is larger than a predetermined value. An adaptive filter section generates a signal indicative of a signal component of a target ... | 08/18/2009 |
| 7574007 | Stimulus analysis system and method having adaptive artifact rejection A stimulus analysis system and artifact rejection method are disclosed. The method may be used in many applications, such as, for example, DPOAE testing, TEOAE testing, BAER testing, ultrasound, MRI, RADAR, GPS, EEG, EKG, or communications. In one embodiment, a syst... | 08/11/2009 |
| 7574008 | Method and apparatus for multi-sensory speech enhancement A method and apparatus determine a channel response for an alternative sensor using an alternative sensor signal and an air conduction microphone signal. The channel response is then used to estimate a clean speech value using at least a portion of the alternative s... | 08/11/2009 |
| 7519186 | Noise reduction systems and methods for voice applications Various embodiments reduce noise within a particular environment, while isolating and capturing speech in a manner that allows operation within an otherwise noisy environment. In one embodiment, an array of one or more microphones is used to selectively eliminate no... | 04/14/2009 |
| 7474756 | System and method for non-square blind source separation under coherent noise by beamforming and time-frequency masking A system and method for non-square blind source separation (BSS) under coherent noise. The system and method for non-square BSS estimates the mixing parameters of a mixed source signal and filters the estimated mixing parameters so that output noise is reduced and t... | 01/06/2009 |
| 7392177 | Method and system for reducing a voice signal noise A method is provided whereby, before being subjected to a low rate voice coding, an incoming digital voice signal is chronologically segmented into blocks, the blocks are broken down respectively, in chronological order, into frequency components by a transformation... | 06/24/2008 |
| 7386135 | Cardioid beam with a desired null based acoustic devices, systems and methods An acoustic device is provided with first and second one or more acoustic elements to generate a first signal that includes mostly undesired audio and substantially void of desired audio, and a second signal that includes desired as well undesired audio respectively... | 06/10/2008 |
| 7382887 | Method and device for reducing high frequency error components of a multi-channel modulator A method and device for reducing error components of a multi-channel modulator. The method comprises the steps of inverting substantially half of the channels of a modulator, and reducing error components between said inverted channels and said non inverted channels... | 06/03/2008 |
| 7369532 | Apparatus and method for an audio channel switching wireless device An apparatus and method for an audio channel switching headset are described. The method includes detection of a plurality of audio sources within communication range of a wireless headset device. Once the plurality of audio sources are detected, an audio link may b... | 05/06/2008 |
| 7366309 | Robot A robot includes first and second microphones and movable portions. The first microphone gathers a first sound reception signal by gathering mainly a target signal. The second microphone gathers a second reception sound signal by gathering mainly noise other than th... | 04/29/2008 |
| 7366658 | Noise pre-processor for enhanced variable rate speech codec An enhanced noise pre-processor in a speech codec smoothes channel energy estimate moving toward a first smoothing constant if a prior signal to noise ratio estimate for more than five channels are above a threshold and toward a second smaller smoothing constant oth... | 04/29/2008 |
| 7366265 | System for detecting the characteristics of a time varying multipath component A system for receiving a composite signal including a main component and a multipath component includes a demodulator chain having adaptive circuitry controllable in response to a control signal to compensate for the multipath component. In this system, a control si... | 04/29/2008 |
| 7358798 | Nonlinear filter A system and a method are disclosed for converting analog signal to digital. An analog to digital converter system comprises an analog to digital converter (ADC) and an adaptive filter coupled to the ADC, wherein the adaptive filter is coupled to the ADC in a feedfo... | 04/15/2008 |
| 7359522 | Coding of stereo signals A method of encoding a multi-channel signal having first and second signal components includes determining a set of filter parameters a prediction filter such that the prediction filter provides an estimate of the second signal component when receiving the first sig... | 04/15/2008 |
| 7359520 | Directional audio signal processing using an oversampled filterbank A directional signal processing system for beamforming information signals. The system includes an oversampled filterbank, which has an analysis filterbank for transforming the information signals in time domain into channel signals in transform domain, a synthesis ... | 04/15/2008 |
| 7343281 | Processing of multi-channel signals A method of generating a monaural signal (S) includes a combination of at least two input audio channels (L, R). Corresponding frequency components from respective frequency spectrum representations for each audio channel (L(k), R(k)) are summed to provide a set of ... | 03/11/2008 |
| 7340063 | Feedback cancellation with low frequency input The invention relates to a method for canceling feedback in an acoustic system comprising a microphone, a signal path, a speaker and means for detecting presence of feedback between the speaker and the microphone, the method comprising providing a LMS algorithm for ... | 03/04/2008 |
| 7330556 | Binaural signal enhancement system A signal processing system, such as a hearing aid system, adapted to enhance binaural input signals is provided. The signal processing system is essentially a system with a first signal channel having a first filter and a second signal channel having a second filter... | 02/12/2008 |
| 7327852 | Method and device for separating acoustic signals In a method of separating acoustic signals from a plurality of sound sources comprising the following steps: disposing two microphones (MIK1, MIK2) at a predefined distance (d) from one another; picking up the acoustic signals with both microphones (MI... | 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 |
| 7315816 | Recovering method of target speech based on split spectra using sound sources' locational information The present invention relates to a method for recovering target speech from mixed signals, which include the target speech and noise observed in a real-world environment, based on split spectra using sound sources' locational information. This method includes: the f... | 01/01/2008 |
| 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 |
| 7302066 | Method for eliminating an unwanted signal from a mixture via time-frequency masking A method is presented for eliminating an unwanted signal (e.g., background music, interference, etc.) from a mixture of a desired signal and the unwanted signal via time-frequency masking. Given a mixture of the desired signal and the unwanted signal, the goal of th... | 11/27/2007 |
| 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 |
| 7280943 | Systems and methods for separating multiple sources using directional filtering Systems and methods for performing source separation are provided. Source separation is performed using a composite signal and a signal dictionary. The composite signal is a mixture of sources received by a sensor. The signal dictionary is a database of filtered bas... | 10/09/2007 |
| 7277722 | Reducing undesirable audio signals A way of reducing undesirable audio signals is provided. A portable device is provided that comprises a sensor to sense an audio signal and a control unit that is communicatively coupled to the sensor. The control unit is provided to receive a first audio signal fro... | 10/02/2007 |
| 7274794 | Sound processing system including forward filter that exhibits arbitrary directivity and gradient response in single wave sound environment A sound processing system including at least one microphone, an audio processor, and at least one output device. The audio processor includes an analog beamformer, a microphone equalizer, and an apparent incidence processor. Two different embodiments of the apparent... | 09/25/2007 |
