Patent application number | Description | Published |
20100128881 | Acoustic Voice Activity Detection (AVAD) for Electronic Systems - Acoustic Voice Activity Detection (AVAD) methods and systems are described. The AVAD methods and systems, including corresponding algorithms or programs, use microphones to generate virtual directional microphones which have very similar noise responses and very dissimilar speech responses. The ratio of the energies of the virtual microphones is then calculated over a given window size and the ratio can then be used with a variety of methods to generate a VAD signal. The virtual microphones can be constructed using either an adaptive or a fixed filter. | 05-27-2010 |
20100128894 | Acoustic Voice Activity Detection (AVAD) for Electronic Systems - Acoustic Voice Activity Detection (AVAD) methods and systems are described. The AVAD methods and systems, including corresponding algorithms or programs, use microphones to generate virtual directional microphones which have very similar noise responses and very dissimilar speech responses. The ratio of the energies of the virtual microphones is then calculated over a given window size and the ratio can then be used with a variety of methods to generate a VAD signal. The virtual microphones can be constructed using either an adaptive or a fixed filter. | 05-27-2010 |
20100278352 | Wind Suppression/Replacement Component for use with Electronic Systems - Systems and methods to reduce the negative impact of wind on an electronic system include use of a first detector that receives a first signal and a second detector that receives a second signal. A voice activity detector (VAD) coupled to the first detector generates a VAD signal when the first signal corresponds to voiced speech. A wind detector coupled to the second detector correlates signals received at the second detector and derives from the correlation wind metrics that characterize wind noise that is acoustic disturbance corresponding to at least one of air flow and air pressure in the second detector. The wind detector controls a configuration of the second detector according to the wind metrics. The wind detector uses the wind metrics to dynamically control mixing of the first signal and the second signal to generate an output signal for transmission. | 11-04-2010 |
20100280824 | Wind Suppression/Replacement Component for use with Electronic Systems - Systems and methods to reduce the negative impact of wind on an electronic system include use of a first detector that receives a first signal and a second detector that receives a second signal. A voice activity detector (VAD) coupled to the first detector generates a VAD signal when the first signal corresponds to voiced speech. A wind detector coupled to the second detector correlates signals received at the second detector and derives from the correlation wind metrics that characterize wind noise that is acoustic disturbance corresponding to at least one of air flow and air pressure in the second detector. The wind detector controls a configuration of the second detector according to the wind metrics. The wind detector uses the wind metrics to dynamically control mixing of the first signal and the second signal to generate an output signal for transmission. | 11-04-2010 |
20110026722 | Vibration Sensor and Acoustic Voice Activity Detection System (VADS) for use with Electronic Systems - A voice activity detector (VAD) combines the use of an acoustic VAD and a vibration sensor VAD as appropriate to the conditions a host device is operated. The VAD includes a first detector receiving a first signal and a second detector receiving a second signal. The VAD includes a first VAD component coupled to the first and second detectors. The first VAD component determines that the first signal corresponds to voiced speech when energy resulting from at least one operation on the first signal exceeds a first threshold. The VAD includes a second VAD component coupled to the second detector. The second VAD component determines that the second signal corresponds to voiced speech when a ratio of a second parameter corresponding to the second signal and a first parameter corresponding to the first signal exceeds a second threshold. | 02-03-2011 |
20130211830 | WIND SUPPRESSION/REPLACEMENT COMPONENT FOR USE WITH ELECTRONIC SYSTEMS - Techniques associated with an acoustic vibration sensor are described, including a first detector that receives a first signal and a second detector that receives a second signal and a third signal, wherein the first signal comprises a skin surface microphone signal, a static equalization filter coupled to the first detector and configured to generate an equalized first signal, a voice activity detector coupled to the first detector, and a wind detector coupled to the second detector, the wind detector configured to correlate the second signal and the third signal and to derive from the correlation a plurality of wind metrics associated with a wind noise, the wind detector is further configured to determine a magnitude associated with the wind noise, to determine whether to suspend an activity of the system, and to determine a duration of time that the magnitude associated with the wind noise exceeds a threshold. | 08-15-2013 |
20140126743 | ACOUSTIC VOICE ACTIVITY DETECTION (AVAD) FOR ELECTRONIC SYSTEMS - Acoustic Voice Activity Detection (AVAD) methods and systems are described. The AVAD methods and systems, including corresponding algorithms or programs, use microphones to generate virtual directional microphones which have very similar noise responses and very dissimilar speech responses. The ratio of the energies of the virtual microphones is then calculated over a given window size and the ratio can then be used with a variety of methods to generate a VAD signal. The virtual microphones can be constructed using either an adaptive or a fixed filter. | 05-08-2014 |
20140126744 | ACOUSTIC VOICE ACTIVITY DETECTION (AVAD) FOR ELECTRONIC SYSTEMS - Acoustic Voice Activity Detection (AVAD) methods and systems are described. The AVAD methods and systems, including corresponding algorithms or programs, use microphones to generate virtual directional microphones which have very similar noise responses and very dissimilar speech responses. The ratio of the energies of the virtual microphones is then calculated over a given window size and the ratio can then be used with a variety of methods to generate a VAD signal. The virtual microphones can be constructed using either an adaptive or a fixed filter. | 05-08-2014 |
Patent application number | Description | Published |
20120184337 | WIRELESS CONFERENCE CALL TELEPHONE - A wireless conference call telephone system uses body-worn wired or wireless audio endpoints comprising microphones and, optionally, speakers. These audio-endpoints, which include headsets, pendants, and clip-on microphones to name a few, are used to capture the user's voice and the resulting data may be used to remove echo and environmental acoustic noise. Each audio-endpoint transmits its audio to the telephony gateway, where noise and echo suppression can take place if not already performed on the audio-endpoint, and where each audio-endpoint's output can be labeled, integrated with the output of other audio-endpoints, and transmitted over one or more telephony channels of a telephone network. The noise and echo suppression can also be done on the audio-endpoint. The labeling of each user's output can be used by the outside caller's phone to spatially locate each user in space, increasing intelligibility. | 07-19-2012 |
20120207322 | MICROPHONE ARRAY WITH REAR VENTING - Microphone arrays (MAs) are described that position and vent microphones so that performance of a noise suppression system coupled to the microphone array is enhanced. The MA includes at least two physical microphones to receive acoustic signals. The physical microphones make use of a common rear vent (actual or virtual) that samples a common pressure source. The MA includes a physical directional microphone configuration and a virtual directional microphone configuration. By making the input to the rear vents of the microphones (actual or virtual) as similar as possible, the real-world filter to be modeled becomes much simpler to model using an adaptive filter. | 08-16-2012 |
20120230511 | MICROPHONE ARRAY WITH REAR VENTING - Techniques for noise suppression systems coupled to one or more microphone arrays are described, including a housing, a first microphone, a second microphone, and a third microphone, where the third microphone functions as a common rear vent for the first and the second microphones. | 09-13-2012 |
20120230699 | LIGHT-BASED DETECTION FOR ACOUSTIC APPLICATIONS - A light-based skin contact detector is described, including a boot having an index of refraction less than or equal to another index of refraction associated with skin at a frequency of light, a light emitter and detector coupled to the boot and configured to measure an amount of light energy reflected by an interface of the boot, and a digital signal processor configured to detect a change in the amount of light energy reflected by the interface. Embodiments relate to methods for detecting skin contact by measuring an amount of energy reflected by an interface when a boot is not in contact with skin, measuring another amount of energy reflected by another interface when the boot is in contact with the skin, and detecting a change between the amount of energy and the another amount of energy using a digital signal processor. | 09-13-2012 |
20120288079 | WIRELESS CONFERENCE CALL TELEPHONE - A wireless conference call telephone system uses body-worn wired or wireless audio endpoints comprising microphone arrays and, optionally, speakers. These audio-endpoints, which include headsets, pendants, and clip-on microphones to name a few, are used to capture the user's voice and the resulting data may be used to remove echo and environmental acoustic noise. Each audio-endpoint transmits its audio to the telephony gateway, where noise and echo suppression can take place if not already performed on the audio-endpoint, and where each audio-endpoint's output can be labeled, integrated with the output of other audio-endpoints, and transmitted over one or more telephony channels of a telephone network. The noise and echo suppression can also be done on the audio-endpoint. The labeling of each user's output can be used by the outside caller's phone to spatially locate each user in space, increasing intelligibility. | 11-15-2012 |
20120300952 | CALIBRATION SYSTEM WITH CLAMPING SYSTEM - Systems and methods are described for clamping a headset in a calibration system using a clamp system that includes a clamp, platform, and one or more spindles (e.g., cushion spindles) to minimize or eliminate issues associated with positioning of headsets. The clamp system comprises a mount having a receptacle. When a device is introduced to the mount the receptacle receives at least a portion of a device. The clamp system includes a clamp attached to the mount and having a first arm rotateably coupled to a second arm that controls the first arm between an open position and a closed position. A platform and at least one spindle are connected to the first arm. When the device is present in the receptacle and the first arm is in the closed position the spindle contacts the device and seats or secures the device in the receptacle. | 11-29-2012 |
20140140524 | WIND SUPPRESSION/REPLACEMENT COMPONENT FOR USE WITH ELECTRONIC SYSTEMS - Systems and methods to reduce the negative impact of wind on an electronic system include use of a first detector that receives a first signal and a second detector that receives a second signal. A voice activity detector (VAD) coupled to the first detector generates a VAD signal when the first signal corresponds to voiced speech. A wind detector coupled to the second detector correlates signals received at the second detector correlates signals received at the second detector and derives from the correlation wind metrics that characterize wind noise that is acoustic disturbance corresponding to at least one of air flow and air pressure in the second detector. The wind detector controls a configuration of the second detector according to the wind metrics. The wind detector uses the wind metrics to dynamically control mixing of the first signal and the second signal to generate an output signal for transmission. | 05-22-2014 |
20140188467 | VIBRATION SENSOR AND ACOUSTIC VOICE ACTIVITY DETECTION SYSTEMS (VADS) FOR USE WITH ELECTRONIC SYSTEMS - A voice activity detector (VAD) combines the use of an acoustic VAD and a vibration sensor VAD as appropriate to the conditions a host device is operated. The VAD includes a first detector receiving a first signal and a second detector receiving a second signal. The VAD includes a first VAD component coupled to the first and second detectors. The first VAD component determines that the first signal corresponds to voiced speech when energy resulting from at least one operation on the first signal exceeds a first threshold. The VAD includes a second VAD component coupled to the second detector. The second VAD component determines that the second signal corresponds to voiced speech when a ratio of a second parameter corresponding to the second signal and a first parameter corresponding to the first signal exceeds a second threshold. | 07-03-2014 |
20140192998 | ADVANCED SPEECH ENCODING DUAL MICROPHONE CONFIGURATION (DMC) - A microphone array is described for use in ultra-high acoustical noise environments. The microphone array includes two directional close-talk microphones. The two microphones are separated by a short distance so that one microphone picks up more speech than the other. The microphone array can be used along with an adaptive noise removal program to remove a significant portion of noise from a speech signal of interest. | 07-10-2014 |
20140286519 | MICROPHONE ARRAY WITH REAR VENTING - Microphone arrays (MAs) are described that position and vent microphones so that performance of a noise suppression system coupled to the microphone array is enhanced. The MA includes at least two physical microphones to receive acoustic signals. The physical microphones make use of a common rear vent (actual or virtual) that samples a common pressure source. The MA includes a physical directional microphone configuration and a virtual directional microphone configuration. By making the input to the rear vents of the microphones (actual or virtual) as similar as possible, the real-world filter to be modeled becomes much simpler to model using an adaptive filter. | 09-25-2014 |
20140294208 | LIGHT-BASED DETECTION FOR ACOUSTIC APPLICATIONS - A light-based skin contact detector is described, including a boot having an index of refraction less than or equal to another index of refraction associated with skin at a frequency of light, a light emitter and detector coupled to the boot and configured to measure an amount of light energy reflected by an interface of the boot, and a digital signal processor configured to detect a change in the amount of light energy reflected by the interface. | 10-02-2014 |
20140328496 | CALIBRATED DUAL OMNIDIRECTIONAL MICROPHONE ARRAY (DOMA) - Systems and methods are described by which microphones are calibrated. Disclosed are techniques for generating a first output signal from a first input signal at a first microphone, generating a second output signal from a second input signal at a second microphone, forming a first filter as a function of the first output signal and the second output signal, the first filter being configured to substantially model the first microphone, and forming a second filter as a function of the first output signal and the second output signal, the second filter being configured to substantially model the second microphone. The second filter may be used to output a third output signal from the first output signal, and the first filter may be used to output a fourth output signal from the second output signal. The fourth output signal may be substantially similar to the third output signal. | 11-06-2014 |
20140328497 | CALIBRATED DUAL OMNIDIRECTIONAL MICROPHONE ARRAY (DOMA) - Systems and methods are described by which microphones are calibrated. Disclosed are techniques for generating a first output signal from a first input signal at a first microphone, generating a second output signal from a second input signal at a second microphone, forming a first filter as a function of the first output signal and the second output signal, the first filter being configured to substantially model the first microphone, and forming a second filter as a function of the first output signal and the second output signal, the second filter being configured to substantially model the second microphone. The second filter may be used to output a third output signal from the first output signal, and the first filter may be used to output a fourth output signal from the second output signal. A first virtual microphone and a second virtual microphone may be formed using the third output signal and the fourth output signal. | 11-06-2014 |
Patent application number | Description | Published |
20080274242 | ANTIMICROBIAL COMPOSITIONS AND METHODS FOR TREATING PACKAGED FOOD PRODUCTS - A method of using an antimicrobial composition on a food product is described where the antimicrobial composition is applied to a food product, the food product is packaged and sealed, and then optionally activation energy is applied to the sealed food product. | 11-06-2008 |
20090246336 | BACTERIOPHAGE TREATMENT FOR REDUCING AND PREVENTING BACTERIAL CONTAMINATION - A system and method for reducing or preventing bacterial contamination in food includes application of a bacteriophage treatment to any type of food product at any stage of processing the food product. The bacteriophage treatment may also be applied to non-food surfaces and water systems, which may be susceptible to bacterial contamination and subsequent spread of bacteria. The bacteriophage treatment comprises at least one bacteriophage in a concentration sufficient to reduce or prevent bacterial contamination from pathogenic bacteria and/or spoilage bacteria. In some embodiments, the bacteriophage is able to reduce or eliminate bacteria introduced to a food product after the bacteriophage treatment was applied to the food product. In some embodiments, the bacteriophage treatment includes a buffering agent to maintain the bacteriophage at a pH level that sustains the bacteriophage. In some embodiments, the bacteriophage treatment includes a surfactant and/or a thickener to aid in applying the bacteriophage. Additional adjuvants and enhancers may be used in some embodiments to stabilize the bacteriophage or enhance its performance as an antibacterial agent. | 10-01-2009 |
20100297316 | ANTIMICROBIAL COMPOSITIONS FOR USE ON FOOD PRODUCTS - The present disclosure relates to methods of treating food products by applying an antimicrobial composition and processing the food product using selected processing methods. | 11-25-2010 |
20110172307 | ANTIMICROBIAL COMPOSITIONS FOR USE ON FOOD PRODUCTS - The present invention relates to antimicrobial compositions, and specifically antimicrobial compositions that are useful at sanitizing food products. The compositions of the present invention include octanoic acid, an acidulant, a coupling agent, an optional buffer, and water. The compositions of the present invention are composed of GRAS or food additive raw materials. | 07-14-2011 |
20120129936 | ANTIMICROBIAL COMPOSITIONS FOR USE ON FOOD PRODUCTS - The present invention relates to antimicrobial compositions, and specifically antimicrobial compositions that are useful at sanitizing food products. The compositions of the present invention include octanoic acid, an acidulant, a coupling agent, an optional buffer, and water. The compositions of the present invention are composed of GRAS or food additive raw materials. | 05-24-2012 |
20140113040 | ANTIMICROBIAL COMPOSITIONS FOR USE ON FOOD PRODUCTS - The present disclosure relates to methods of treating food products by applying an antimicrobial composition and processing the food product using selected processing methods. | 04-24-2014 |