82 results about "Noise-canceling microphone" patented technology

An adaptive noise canceling microphone system for extracting a desired signal, in particular a desired speech signal, comprising two microphones being arranged at a predefined distance from each other; a signal forming system (SFS) being adapted to receive a first and second input signals resulting from sounds received by the two microphones wherein an acoustical signal component in the first input signal is determined, wherein an acoustical signal component in the second input signal is determined, wherein the acoustical signal component in the first input signal is enhanced to generate a speech enhanced signal, and wherein the acoustical signal component in the second input signal is suppressed to generate a speech nulled signal; an adaptive noise cancellation filtering circuit being adapted to receive the speech enhanced signal and the speech nulled signal, wherein the noise in the speech enhanced signal is cancelled using the speech nulled signal as reference, thereby generating an output filtered signal representing the desired signal.

Critical needs for MRI patient instruction, testing, comfort, motion control, and speech communication are provided for better imaging which leads to more effective medical care. An MRI Digital Video Projection System is disclosed which provides better quality display to the patient to better inform, instruct, test, and comfort the patient plus the potential to stimulate the brain with microsecond onset times to better diagnose brain function. An MRI Motion Tracker and Patient Augmented Visual Feedback System enables monitoring patient body part motion, providing real time feedback to the patient and / or technician to substantially improve diagnostic yield of scanning sessions, particularly for children and mentally challenged individuals. An MR Forward Predictive Noise Canceling Microphone System removes the intense MRI acoustic noise improving patient communication, patient safety and enabling coding of speech output. These systems can be used individually but maximum benefit is from providing all three.

An embodiment of the invention discloses audio equipment, terminal equipment and electronic equipment. The method includes a Type-C male connector, a first loudspeaker and a first noise reduction microphone; the Type-C male connector is coupled to the first noise reduction microphone through a first noise signal output pin and is coupled to the first loudspeaker through a first audio signal input pin; and under a circumstance that the Type-C male connector is inserted in and electrically connected with a Type-C female connector of a target device, the audio equipment outputs a first noise signal collected by the first noise reduction microphone to the target device through the first noise signal output pin, receives through the first audio signal input pin a first audio signal obtained after noise reduction processing is performed on the first noise signal, and transmits the first audio signal to the first loudspeaker. The structure of the noise-reduction audio equipment is simplified, cost is reduced, and the implementation scheme is simple.

A system and method detects whether or not a microphone apparatus is positioned incorrectly relative to an acoustic source and of automatically compensating for such mispositioning. A position estimation circuit determines whether the microphone apparatus is mispositioned. A controller facilitates the automatic compensation of the mispositioning.

A microphone housing improves the broadband noise canceling performance of an active noise canceling microphone system while also ensuring improved speech transmission through the system. First and second microphone elements are selected each having a diameter “d” and a thickness “t”. The two microphone elements are aligned axially with the back surfaces in contact and secured in an axially aligned cylindrical cavity within a cylindrically shaped housing. The cylindrically shaped housing has an outside diameter “D,” an interior cavity of diameter of “d,” and a height “2t”. The housing is exposed to an environment comprising both speech and noise. The first microphone element is adapted to receive a signal having both voice and noise components, while the second microphone element is adapted to receive a signal that is predominantly noise. A controller processes signals from the first microphone element and the second microphone element. The values of D and d are selected so to obtain a ratio of D over d between 1 and about 2.4 or a near field power difference of the first microphone signal and the second microphone signal between 8 dB and 11 dB. In the event the near field power difference is more than 11 dB, the outside diameter of the microphone housing “D” is reduced. In the event the near field power difference is less than 8 dB, the outside diameter of the microphone housing “D” is increased.

The invention discloses a method and device for counteracting environment noise and an active noise reduction earphone. The device comprises a microphone, a DSP chip, an active noise reduction controller, and a loudspeaker, wherein the microphone is used as a feed-forward noise reduction microphone and an environmental noise monitoring microphone so as to acquire the environmental noise in real time; the DSP chip periodically selects a noise reduction mode best-matched with the current environment according to the environmental noise acquired by the microphone, and sending a corresponding noise reduction parameter to the active noise reduction controller; the active noise reduction controller performs the feed-forward filter noise reduction according to the noise reduction parameter sent by the DSP chip, and outputs the waveform for counteracting the environmental noise; and the loudspeaker plays the corresponding sound signal according to the waveform to counteract the environmental noise at the ear, thereby achieving the optimal noise reduction effect under various different environments, and the switching of the noise reduction mode is self-adaptively performed aiming at different noise environments, thereby guaranteeing that the best noise reduction experience can be provided under various different environments.

An eyewear device includes a noise cancelling microphone array, and corresponding method for the same. The eyewear device and its method of use facilitates human-machine interaction using speech recognition by reducing unwanted noise that corrupts the desired speech and thereby reduces errors in speech. The eyewear device includes an eyeglasses frame, an array of microphones coupled to the eyeglasses frame, the array of microphones including at least a first microphone and a second microphone, the first microphone coupled to the eyeglasses frame about a temple region, the temple region can be located approximately between a top corner of a lens opening and a support arm, and providing a first audio channel output, and the second microphone coupled to the eyeglasses frame about an inner edge of the lens opening, and providing a second audio channel output. Embodiments can further include a third and fourth omni-directional microphone, providing a third and fourth audio channel, respectively.

Certain embodiments of a noise canceling microphone with acoustically tuned ports are disclosed herein. In one aspect of the invention, the noise canceling microphone may comprise a housing, a transducer for converting received energy received into electrical signals, where the transducer is located in the housing, a front and rear sound pathways to a front and rear sound openings in the transducer, where the front and rear sound pathways may be located on opposite sides of the housing and may be displaced 180 degrees off a vertical axis. The noise canceling microphone may further comprising a boom for supporting the noise canceling microphone, where the boom may be deformed to place the noise canceling microphone near the mouth of the user. For example, the boom may be deformed to place the noise canceling microphone at least ten millimeters away from the edge of the mouth of the user.

Example embodiments include a method of reducing noise include forming a main signal and one or more reference signals at a beam-former based on at least two received audio signals, detecting voice activity at a voice activity detector, where the voice activity detector receives the main and reference signals and outputting a desired voice activity signal, adaptively cancelling noise at an adaptive noise canceller, where the adaptive noise canceller receives the main, reference, and desired voice activity signals and outputs an adaptive noise cancellation signal, and reducing noise at a noise reducer receiving the desired voice activity and adaptive noise cancellation signals and outputting a desired speech signal.

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 signal. The first microphone apparatus may have a first back-side cavity and the second microphone may have a second back-side cavity. The first and second back-side cavities may be fluidly unconnected. The system also has combining logic operatively coupled with the first microphone apparatus and the second microphone apparatus. The combining logic uses the second output signal to remove at least a portion of the noise component from the first output signal.

Methods, systems and apparatus are described for mitigating noise during sound recording. A noise mitigating microphone attachment comprises a foam structure. A first cavity extending from a first opening at a surface of the foam structure and into the foam structure. A microphone is inserted into the first cavity with sound receiving elements of the microphone fully installed in the structure. A second cavity extending from a second opening at the surface of the foam structure and into the foam structure is configured to receive sound from a sound source. The first cavity is fluidly connected to the second cavity within the foam structure so that a junction is formed between the first cavity and the second cavity. The junction, the sound cavity, and the sealing of the microphone work to shield the sound receiving elements of the microphone from sound other than received through the second opening.

The invention provides a working control method for earphone noise reduction and an audio processor in a terminal device. Pins in a USB Type C interface are multiplexed, when the scheme provided by the invention is implemented, switch modules corresponding to the pins in the USB Type C interface are switched to ensure that the normal functions of the pins in the USB Type C interface are not influenced, a DMIC module in the terminal device is connected with a noise reduction microphone in an earphone by the pins in the USB Type C interface, in order to receive a noise reduction signal sent by the microphone through the DMIC module in the terminal device to realize the noise reduction processing of the terminal device on the earphone, and no additional audio processing chip or power supply needs to be added in the earphone, thereby effectively reducing the cost of the earphone, reducing the size and the weight of the earphone and effectively improving the user experience.

An apparatus, system and method for providing speech recognition assist in call handover are provided. With the apparatus, system and method, spoken utterances of the call taker, not the caller, are captured using speech recognition technology and transcribed. The call taker can use a noise-canceling microphone placed optimally to receive voice input from the call taker. The speech recognition system can be trained to the specific speech patterns of the call taker and the vocabulary of the speech recognition system can be limited to the specific domain of discourse related to the job scope of the call taker. The transcription of the spoken utterances of the call taker may be stored in a record associated with the call. This record, and the corresponding transcription, may be transferred to another call taker upon handover of the call to the other call taker.

Methods, systems and apparatus are described for mitigating noise during sound recording. A noise mitigating microphone attachment comprises a foam structure. A first cavity extending from a first opening at a surface of the foam structure and into the foam structure. A microphone is inserted into the first cavity with sound receiving elements of the microphone fully installed in the structure. A second cavity extending from a second opening at the surface of the foam structure and into the foam structure is configured to receive sound from a sound source. The first cavity is fluidly connected to the second cavity within the foam structure so that a junction is formed between the first cavity and the second cavity. The junction, the sound cavity, and the sealing of the microphone work to shield the sound receiving elements of the microphone from sound other than received through the second opening.

The present invention provides a noise reduction method of an earphone and a noise reduction earphone. The noise reduction method of the earphone comprises the steps that a calibration module drives a single horn to send out an original noise signal, and a noise reduction microphone receives the original noise signal and transmits the received original noise signal to the calibration module; the calibration module initializes parameters of the earphone according to the original noise signal transmitted by the noise reduction microphone, and generates a corresponding anti-noise signal, in addition, the calibration module drives the single horn to send out the original noise signal and the anti-noise signal; and the original noise signal and the anti-noise signal are offset, so as to form an error signal, the noise reduction microphone receives the error signal and transmits the error signal to the calibration module, and the calibration module determines a threshold of a noise reduction quantity of the error signal. Through adoption of the method, parameters of the noise reduction earphone can be calibrated automatically, and the noise reduction effect of the earphone is improved.

The embodiment of the application discloses a communication noise reducing method, a device and a terminal, which belongs to the technical field of voice communication. The method includes steps of acquiring working state of the terminal under a communication state, wherein the working state comprises an unfolding state and a folding state; arranging work modes of at least two microphones according to the working state, wherein the working modes comprise a sound recording mode and a noise reducing mode; collecting a first audio signal through the microphone under the noise reducing mode, and collecting a second audio signal through the microphone under the sound recording mode; reducing noise of the second audio signal according to the first audio signal. The embodiment of the applicationhas the advantages of realizing self-adaptive setting of orientations of the sound recording microphone and the noise reducing microphone, and ensuring good communication quality under different working states.

An earphone uplink denoising method provided by the present invention comprises the steps of reusing a denoising microphone in a left or right receiver of an earphone as a first uplink denoising microphone, and taking a conversation microphone as a second uplink denoising microphone; obtaining a voice signal picked up by the second uplink denoising microphone, and comparing the voice signal with a preset threshold value, wherein the preset threshold value is a preset energy value or a sensitivity value of the voice signal picked up by the second uplink denoising microphone; if the voice signal is less than the preset threshold value, adopting the first uplink denoising microphone and the second uplink denoising microphone to eliminate the noise of the voice signal; otherwise, adopting the second uplink denoising microphone to eliminate the noise of the voice signal. According to the present invention, the problem that the position of the conversation microphone is not fixed, so that the earphone uplink denoising performance fluctuates, can be avoided, thereby improving the conversation voice quality.

The embodiment of the invention provides a method for noise reduction, a headset and a terminal. The headset comprises noise-reducing microphones used for collecting at least two paths of noise signals; a signal processing circuit used for modulating the at least two paths of noise signals onto different spectrums so as to obtain frequency division multiplexing signals; a transmitting and receiving circuit used for transmitting the frequency division multiplexing signals to a terminal through a microphone pin of the headset and also used for receiving noise reduction signals which are transmitted by the terminal based on the frequency division multiplexing signals, wherein the noise reduction signals are used for noise reduction of the at least two paths of noise signals; and a loudspeaker used for playing the noise reduction signals transmitted by the terminal. Therefore, arrangement of a noise reduction module inside the headset is unnecessary in the embodiment of the invention, the design of the headset can be simplified on the premise of realizing the noise reduction, and the portability of the headset is consequently improved.

The invention discloses a microphone switching method, a mobile terminal and a computer readable storage medium, the method comprises the following steps: when the mobile terminal is in a conversationstate through a voice microphone, detecting whether the voice microphone is in an available state through a preset voice detection model; if the voice microphone is in an unavailable state, switchinga conversation path in the voice microphone to a noise reduction microphone; acquiring voice data of a user through the noise reduction microphone, converting the voice data into electric signals andtransmitting the electric signals to a terminal connected with the mobile terminal. With the method, the mobile terminal and the computer readable storage medium provided by the invention, when the voice microphone of the mobile terminal is in the unavailable state, the conversation path in the voice microphone can be switched to the noise reduction microphone, the voice data of the user can be acquired through the noise reduction microphone, thus, the user of the mobile terminal still can make conversation with a corresponding party through the noise reduction microphone when the voice microphone is in the unavailable state.

A microphone system has a package with a top, a bottom, and four sides that at least in part form an interior chamber. One of the sides forms an inlet aperture for communicating the inlet chamber with the exterior environment. The system also has first and second microphone dies, in a stacked relationship, respectively having a first and second diaphragms. A circuit die, positioned in electrical communication with the first and second microphone dies, is configured to mitigate vibrational noise from the first microphone die using a signal produced by the second microphone die or vice versa. The first and second microphone dies are positioned so that the first and second diaphragms are substantially the same distance from the inlet aperture in the side.

Systems and methods for a noise canceling microphone and microphone system are disclosed. The system generally includes a housing with a printed circuit board forming a surface of the housing. Electrical terminals are located on an exterior side of the printed circuit board. A diaphragm is disposed within the housing. A first port in the housing remote from the printed circuit board provides access to one face of the diaphragm first face and a second port disposed in the housing remote from the printed circuit board provides access to a second face of the diaphragm.

The invention provides an earphone and a noise reducing method thereof. The earphone comprises two ear plugs and earphone lines connected with the ear plugs, wherein the ear plugs comprise shells and sounding units accommodated in the shells; noise reducing microphones are arranged in the two ear plugs respectively; a call microphone is fixed to one of the earphone lines; the call microphone and the two noise reducing microphones are used for performing uplink noise reduction on the earphone; and the two noise reduction microphones are used for performing downlink noise reduction on the earphone. Through adoption of the earphone and the noise reducing method thereof, a heart-shaped wave beam can be formed in front of the head of a user through the three microphones, so that the influence of external noise is lowered, and the call quality of the earphone is improved.

The invention relates to the technical field of electronics, and in particular relates to a method for waking up a mobile phone by custom voice. The method is applied to the mobile phone and comprises the following steps: a, inputting a mobile phone unlocking password, and starting a main microphone and a noise reduction microphone to perform voice noise reduction and set custom voice names; b, entering the custom voice names by a user by virtue of voice, identifying and storing the names, and storing voice characteristic parameters after noise reduction; c, entering a sound for waking up the mobile phone in a screen locking state, identifying a name corresponding to the sound, and extracting characteristic parameters of the sound after noise reduction; and d, comparing and matching the voice characteristic parameters stored in the step b with the characteristic parameters extracted in the step c, and waking up the mobile phone if the matching result shows consistency. The objective of the invention is to provide the method for waking up the mobile phone by custom voice, and by applying the technical scheme provided by the invention, a name for waking up the mobile phone can be customized, so that the way of waking up the mobile phone is more varied.

The invention relates to a method and system for adjusting a conversion volume dynamically by using a noise-reducing microphone. The method comprises: after a conversion terminal is detected to be in a conversion state, a noise-reducing microphone of the conversion terminal is turned on; the noise-reducing microphone detects an environment noise value within set time and calculates an average environment noise value within the set time; according to a preset correspondence relation, an ideal conversion volume corresponding to the average environment noise value is determined; and on the basis of the ideal conversion volume, a receiver output volume of the conversion terminal is adjusted automatically. According to the invention, the noise-reducing microphone of the conversion terminal is used for collecting the environment noise, so that no extra hardware needs to be added; and because the receiver output volume is adjusted dynamically according to the noise value, the influence on the conversion quality by the noisy environment can be avoided under the circumstance that the hand-operated intervention from the user is not required, so that an objective that the normal conversion demand of the user can be satisfied in silent or noisy environment.

The invention discloses a headset, which comprises two ear shells, a head beam connected between the two ear shells, a limiting groove, a telescopic microphone lever and a microphone, wherein the limiting groove is formed in the outer side of one of the ear shells or the outer side of the head beam; the bottom end of the telescopic microphone lever is rotatably mounted in the limiting groove; themicrophone is mounted at the top end of the telescopic microphone lever; during communication by the headset, the telescopic microphone lever is spirally rotated out from the limiting groove and is inan extending state, so that the microphone is aligned with the mouth of a wearer to pick up a voice signal; and during playing of music by the headset, the telescopic microphone lever is in a retracted state and located in the limiting groove, so that the microphone can pick up environmental noise. According to the headset, a traditional communication microphone and a noise reduction microphone are combined into a whole; and only one microphone is disposed on the headset to realize a communication function and a noise reduction function of an ANC (Automatic Noise Canceller), so that the hardware cost and the assembling difficulty of the headset are reduced.

The invention discloses an active noise reduction earphone ground noise reducing method and device. The method comprises the following steps: a noise reduction microphone (1) collects ambient noise and is connected with a gain amplifier (3) to form a ground noise control and feedback circuit; an input sound signal of the loudspeaker is collected and analyzed to obtain a stable noise signal in the signal; and through the amplitude of the signal, active noise reduction microphone gain value is adjusted to obtain an active noise reduction and ground noise optimum effect, thereby providing a better noise reduction experience for a user.

The present invention relates to government service intelligent terminal equipment based on artificial intelligence and a use method thereof. A bar code, two-dimensional code identification, a contactless IC card reader, thermal paper printing, a touch display screen, a speaker, a noise reduction microphone, video collection equipment, a number keyboard, a license scanner and ticket printing equipment are included. The artificial intelligence technology is introduced, the speech recognition technology, the natural language semantic analysis technology, the contextual correlation analysis technology are used to process human-computer interaction, demand screening, process guidance, data collection and processing and other difficult issues, and a series of government affair matters such as consultation, inquiry and handling of government affair matters has been successfully realized in the intelligent terminal equipment.