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A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 8144896 | Speech separation with microphone arrays A system that facilitates blind source separation in a distributed microphone meeting environment for improved teleconferencing. Input sensor (e.g., microphone) signals are transformed to the frequency-domain and independent component analysis is applied to compute ... | 03/27/2012 |
| 8126161 | Acoustic echo canceller system An acoustic echo canceller system having a filter with high suppression performance of acoustic echo, generated by using microphone array having a plurality of microphone elements, judging a band where only a speaker sound is present, based on phase difference among... | 02/28/2012 |
| 8098846 | Sound field generator and method of generating sound field using the same The invention relates to a sound field generator and a method of generating a sound field using the same. More particularly, the invention relates to a sound field generator and a method of generating the same, which can apply a filter in consideration of a masking ... | 01/17/2012 |
| 8050422 | Audio test apparatus capable of decreasing noise influence in process of audio device testing and method thereof A audio test method for decreasing noise influence, which includes the following steps: obtaining analog signals; converting the analog signals into digital signals; intercepting digital signals of a first predetermined length and executing a first Fast Fourier Tran... | 11/01/2011 |
| 8005239 | Audio noise reduction A method for reducing audio noise in an audio signal acquisition is described herein. The method includes: receiving an input audio signal; separating the input audio signal into a high-frequency portion and a low-frequency portion based on a threshold frequency; sy... | 08/23/2011 |
| 7995772 | Method for assessing interfering noise The invention relates to a method for assessing interfering noise in motor vehicles, according to which noise occurring during a predefined measuring time is divided into different frequency ranges, the changes in level relative to the background noise are determine... | 08/09/2011 |
| 7912232 | Method and apparatus for removing or isolating voice or instruments on stereo recordings A first embodiment of the invention provides a method and apparatus for attenuating or amplifying voice or other signals present on a stereo audio recording that uses frequency domain techniques to calculate a time- and frequency-dependent gain factor, based on the ... | 03/22/2011 |
| 7809146 | Audio signal separation device and method thereof Problems of permutation can be solved with high accuracy without utilizing knowledge about original signals or information concerning positions of microphones and the like when each one of plural signals mixed in an audio signal is separated using independent compon... | 10/05/2010 |
| 7720235 | Signal processing method and apparatus, signal processing program, and recording medium A signal processing method divides a first signal of two signals to be compared in similarity into smaller regions, selects one of the regions, and calculates the correlation of the selected one with the other second signal. The method finds a time difference, an ex... | 05/18/2010 |
| 7697700 | Noise removal for electronic device with far field microphone on console Reduction of noise in a device having a console with one or more microphones and a source of narrow band distributed noise located on the console is disclosed. A microphone signal containing a broad band distributed desired sound and narrow band distributed noise is... | 04/13/2010 |
| 7676046 | Method of removing noise and interference from signal A method of removing noise and interference from a signal by receiving the signal, calculating a joint time-frequency domain of the signal, estimating instantaneous frequencies of the joint time-frequency domain, modifying each estimated instantaneous frequency, if ... | 03/09/2010 |
| 7590250 | Analog audio signal enhancement system using a noise suppression algorithm One preferred embodiment of the present invention provides systems and methods for removing noise from an input analog signal in continues time. Briefly described in architecture, one embodiment of the system, among others, can be implemented as follows. An analog f... | 09/15/2009 |
| 7561702 | Method and system for the pre-processing and post processing of an audio signal for transmission on a highly disturbed channel Method and system adapted to modifying an audio signal or speech signal comprising a step in which the frequency spectrum S(k) of the signal is converted by the application of a non-linear function. The method comprises at least the following steps: firstly, determi... | 07/14/2009 |
| 7489789 | Method for noise reduction in an audio device and hearing aid with means for reducing noise The invention regards a method for noise reduction in an audio device whereby an electrical and/or digital signal which represents sound is routed simultaneously through:—a signal analysis path, and—a signal processing path wherein the signal amplification is in... | 02/10/2009 |
| 7415118 | System and method for distributed gain control In accordance with an embodiment, the invention provides a spectral enhancement system that includes a plurality of distributed filters, a plurality of energy distribution units, and a weighted-averaging unit. At least one of the distributed filters receives a multi... | 08/19/2008 |
| 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 |
| 7373297 | Automated speech recognition filter An automated speech recognition filter is disclosed. The automated speech recognition filter device provides a speech signal to an automated speech platform that approximates an original speech signal as spoken into a transceiver by a user. In providing the speech s... | 05/13/2008 |
| 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 |
| 7356151 | Microphone system A system remotely controls a microphone through a remote control unit. The remote control unit includes a frequency modulator that modulates a control signal. A cable conductor that is used to provide phantom power also conveys a frequency-modulated control signal. ... | 04/08/2008 |
| 7356150 | Method and apparatus for extending band of audio signal using noise signal generator A bandpass filter bandpass-filters an inputted signal X to pass therethrough a partial band of a band of the inputted signal X, and a level correlated white noise generator circuit generates a white noise signal having a level changing according to a level of the in... | 04/08/2008 |
| 7352874 | Apparatus for acoustically improving an environment and related method The invention provides an apparatus and related method for acoustically improving an environment. In an embodiment of the invention, an apparatus comprises a partitioning means in the form of a curtain for producing a discontinuity in a sound conducting medium, such... | 04/01/2008 |
| 7349841 | Noise suppression device including subband-based signal-to-noise ratio A noise suppression device calculates a subband SN ratio calculation based on a noise likeness signal, an input signal spectrum and a subband-based estimated noise spectrum. The device calculates a subband-based input signal average spectrum, calculates a subband-ba... | 03/25/2008 |
| 7343283 | Method and apparatus for coding a noise-suppressed audio signal An unfiltered frame portion (2) from a second frame (503) is blended together with a filtered frame portion (1) from a first frame (501) to produce a combined frame portion (507). The combined frame portion (507) is then buf... | 03/11/2008 |
| 7343103 | Apparatus and method for detecting beam power in optical drive An apparatus and method for detecting beam power generated by a plurality of light sources, using a single device. The apparatus includes a light-receiving unit that receives the beam power generated by one of a plurality of light sources, and an amplifying unit tha... | 03/11/2008 |
| 7340068 | Device and method for detecting wind noise A device for detecting the presence of wind noise in an array of microphones including two or more separate sound inlet openings, and a sound to electrical converting element or microphone in relation to each sound inlet opening. The microphones each generate time d... | 03/04/2008 |
| 7333619 | Fast wavelet estimation of weak bio-signals using novel algorithms for generating multiple additional data frames A method and apparatus for de-noising weak bio-signals having a relatively low signal to noise ratio utilizes an iterative process of wavelet de-noising a data set comprised of a new set of frames of wavelet coefficients partially generated through a cyclic shift al... | 02/19/2008 |
| 7319770 | Method of processing an acoustic signal, and a hearing instrument A method of processing an acoustic input signal into an output signal in a hearing instrument includes converting the acoustic input signal into a converted input signal, and applying a gain to the converted input signal to obtain the output signal. According to the... | 01/15/2008 |
| 7313179 | Minimizing windowing effects in particular for signal recovery A measured signal, such as a high-speed digital pulse, transmitted through a system is corrected. The measured signal is sampled to a sampled signal sequence, and a signal series is provided as a plurality of the sampled signal sequences put together successively. T... | 12/25/2007 |
| 7305099 | Electronic devices, methods, and computer program products for detecting noise in a signal based on autocorrelation coefficient gradients An electronic device can be operated to detect noise, such as wind noise. A microphone signal is generated by a microphone. Autocorrelation coefficients are determined based on the microphone signal. Gradient values are determined from the autocorrelation coefficien... | 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 |
| 7302065 | Noise suppressor An amplitude suppression quantity denoting a noise suppression level of a current frame is calculated in an amplitude suppression quantity calculating unit (20), a perceptual weight distributing pattern of both a spectral subtraction quantity and a spectral a... | 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 |
| 7302064 | Fast estimation of weak bio-signals using novel algorithms for generating multiple additional data frames A method and apparatus for de-noising weak bio-signals having a relatively low signal to noise ratio utilizes an iterative process of de-noising a data set comprised of a new set of frames. The method separately performs a non-linear de-noising operation on each of ... | 11/27/2007 |
| 7292985 | Device and method for reducing stuttering The present invention is directed to a wearable stutter reducing device incorporating novel methods that make extensive use of digital signal processing (DSP) technology. The wearable stutter reducing device of the present invention has an audio signal receiver for ... | 11/06/2007 |
| 7289626 | Enhancement of sound quality for computer telephony systems Techniques for enhancing the sound quality of computer telephony systems are provided. In general, digital signals including telephony sounds are converted from the time domain to the frequency domain. If noise is detected in the frequency domain conversion of the d... | 10/30/2007 |
| 7283956 | Noise suppression A method and apparatus for noise suppression is described herein. The channel gain is controlled based on a degree of variability of the background noise. The noise variability estimate is used in conjunction with a variable attenuation concept to produce a family o... | 10/16/2007 |
| 7280961 | Pattern recognizing device and method, and providing medium The silence-acoustic-model correcting division generates a silence acoustic model that is used for recognizing the silent section Ts which exists in the beginning of the speech recognition section, on the basis of the environment noise that is included in the noise ... | 10/09/2007 |
| 7278124 | Design method for semiconductor integrated circuit suppressing power supply noise An impedance of a power supply wire is calculated based on design data of a semiconductor integrated circuit, a frequency characteristic of the calculated impedance is obtained, and a design of the semiconductor integrated circuit is changed based on the obtained fr... | 10/02/2007 |
| 7277550 | Enhancing audio signals by nonlinear spectral operations A system and method are disclosed for enhancing audio signals by nonlinear spectral operations. Successive portions of the audio signal are processed using a subband filter bank. A nonlinear modification is applied to the output of the subband filter bank for each s... | 10/02/2007 |
| 7272233 | Acoustic shock prevention Acoustic shock is reduced by attenuating an input signal based on tones detected through frequency domain analysis. The spectrum of the input signal is obtained. A relative energy signal includes a plurality of relative energy elements, each representing the relativ... | 09/18/2007 |
