40results about How to "Suppress howling" patented technology

The invention discloses a voice signal processing method and device, and the method comprises the following steps: step 1, receiving a decoded far-end signal, and collecting a near-end signal while playing the decoded far-end signal; step 2, estimating and compensating the delay, and performing data alignment operation on the far-end signal and the near-end signal; step 3, sending the aligned far-end and near-end signals into an adaptive echo suppression unit with feedback, and suppressing echoes in the near-end signals; step 4, inhibiting residual echoes and howling in the near-end signal; step 5, suppressing the noise in the near-end signal; and step 6, transmitting the near-end signal through the network. Through the method and the device, the echo, the residual echo, the howling and the noise in the full-duplex call can be suppressed. The problems of echo, howling, noise and the like in the voice talkback can be solved with relatively low complexity.

The invention discloses an audio signal processing method, a model training method and a related device, and the method comprises the steps: inputting an audio input signal into a machine learning model, so as to obtain a first squeal point and a corresponding first gain value; and processing a second howling point in the audio input signal according to the second gain value to obtain an audio output signal. Therefore, howling in the audio input signal is suppressed, howling is suppressed in the initial stage, and gain circulation cannot be carried out. Due to the correspondence of the indication howling points in the machine learning model and the convenience of model calculation, the processing process is rapid, effective audio signals are not affected, and the accuracy and efficiency ofaudio processing are improved.

The invention provides an anti-howling audio signal processing method and a device thereof. The anti-howling audio signal processing method comprises a step of receiving a singing request which comprises the identification of a song to be sung, obtaining a background audio signal corresponding to the identification of the song to be sung, a step of obtaining a far end reference signal and a near end input signal, carrying out howling suppression processing on the near end input signal according to the far end reference signal and obtaining a first audio signal, and a step of mixing the first audio signal and the background audio signal to obtain a second audio signal. According to the embodiment of the invention, the near end input signal is subjected to the howling suppression processing, the howling generated in a speaking amplification environment is effectively suppressed, the scene of a commercial karaoke room can be simulated really, and a user enjoys the function of karaoke at any time.

The invention discloses an earphone noise reduction method, device and system, and a wireless earphone. The method comprises the steps: obtaining an external environment signal collected by a feed-forward microphone and a loudspeaker playing signal collected by a feed-back microphone; wherein the external environment signal comprises an external noise signal and a horn leakage signal; obtaining anoffset signal corresponding to the horn leakage signal according to the horn playing signal; calculating the difference between the external environment signal and the offset signal to obtain a target signal; according to the target signal, noise reduction is carried out on loudspeaker playing of the earphone. According to the invention, a horn playing signal collected by the feedback microphoneis used as a reference signal. According to the invention, the horn leakage signal in the external environment signal collected by the feed-forward microphone is counteracted, so that the problems ofunstable noise reduction performance and howling caused by leakage of the sound signal played by the horn into the feed-forward microphone are inhibited, the noise reduction performance and stabilityof the earphone are improved, and the user experience is improved.

The invention provides a loudspeaker array sound reinforcement system for inhibiting howling. The system comprises an input signal processing module (1), a filter module (2), a multichannel power amplifier (3) and a loudspeaker array (4); the filter module (2) comprises a parameter setting unit (201), a filter group generation unit (202) and a filter group processing unit (203); the filter group generation unit (202) is used for calculating convolution matrixes Hm and Hn formed by time domain impulse response at each control point of the loudspeaker array (4) according to parameters set by the parameter setting unit (201); calculating matrixes Rb and Rd accordingly; calculating a matrix Q according to an average amplitude response fluctuation parameter expression of an equilibrium control point in a sound reinforcement target area; solving a vector w according to Rb, Rd and Q to ensure a maximum value of time domain acoustic energy contrast control of single point equilibrium; converting the vector w into a filter form; and acquiring filter parameters of the filter group processing unit (203).

The invention discloses a microphone howling suppression circuit in an intercom system. The microphone howling suppression circuit comprises a first-stage voltage amplitude limiting circuit and a second-stage negative feedback gain automatic regulation alternating-current in-phase amplifying circuit, wherein the first-stage voltage amplitude limiting circuit comprises an input-stage coupling blocking capacitor, a reverse amplifying circuit, an output-stage coupling blocking capacitor and a diode series clamping circuit which are connected in sequence; the second-stage negative feedback gain automatic regulation alternating-current in-phase amplifying circuit comprises a positive-phase alternating-current amplifying circuit, and a negative feedback gain automatic regulation circuit, a coupling blocking capacitor and an alternating-current path amplification coupling capacitor which are connected with the positive-phase alternating-current amplifying circuit; and the first-stage voltage amplitude limiting circuit is connected with the second-stage negative feedback gain automatic regulation alternating-current in-phase amplifying circuit through a coupling capacitor, and the two stages of circuits are connected with a direct-current biasing circuit. Through adoption of the design, a voice signal can be prevented from being lost while noise is suppressed by the circuit, and the problem of howling caused by a microphone in an audio system is optimized and improved.

An embodiment of the invention discloses an audio frequency data communication method, device and system and belongs to the technical field of communication. First communication links between a main device in a first audio frequency sub-meeting-place and other client ends in the first audio frequency sub-meeting-place are respectively established; via the first communication link, first sound mixing signals that are received are sent to the other client ends in the first audio frequency sub-meeting-place, and the other client ends are enabled to receive the first sound mixing signals synchronously; if the first sound mixing signals are played later than the time when the first sound mixing signals are received by the main device, then the first sound mixing signals tend to be played synchronously by all client ends in the first audio frequency sub-meeting-place, the first sound mixing signals are sound mixing signals of audio frequency signals of other audio frequency sub-meeting-places, a problem that audio feedback squeal and desynchrony are caused when sound of the audio frequency sub-meeting-place is played in the same audio frequency sub-meeting-place can be prevented, and mobile terminals such as mobile phones and the like can be used as client ends in each audio frequency sub-meeting-place.

A howling canceller which suppresses occurrence of howling even when an open loop gain exceeds “1” in the whole reproduction band. In the howling canceller, an adaptive filter (107) operates a digital received voice signal with a tap coefficient to generate a pseudo echo; a subtractor (108) subtracts the pseudo echo from a digital transmitted voice signal to generate a residual signal; and an amplitude limiting circuit (110) limits the absolute value of the amplitude of the digital received voice signal to be equal to or smaller than a predetermined threshold which ensures that all of a D / A converter (101), a power amplifier (102), a speaker (103), a microphone (104), a microphone amplifier (105), and an A / D converter (106) operate in a linear operation area, and outputs the amplitude-limited digital received voice signal to the D / A converter (101) and the adaptive filter (107).

A howling suppressing apparatus able to mitigate the deterioration of sound quality in processed sound that is caused by howling, even in an acoustic feedback loop environment. The howling suppressing apparatus is provided with: a delay device (103) which delays an input signal and outputs a reference signal; a signal separation unit (104) which includes an adaptive filter (109) that adaptively updates the filter coefficient and thereby extracts a periodic signal component from the reference signal; a howling detection unit (105) which uses at least the signal of the periodic signal component outputted from the adaptive filter (109) to detect whether howling has occurred; and a howling suppressing unit (106) which includes a suppressing filter (111) which acquires the filter coefficient from the adaptive filter (109) when howling has been detected by the howling detection unit (105) and extracts the periodic signal component from the reference signal based on that filter coefficient, and a subtracter (112) which subtracts the periodic signal component from the input signal to thereby output an error signal.

The invention relates to a howling suppression device and method. A band-pass filter receives an audio signal sent by an audio processing system, judges whether the frequency of the audio signal belongs to a set bandwidth, and generates a howling signal according to the frequency of the audio signal and sends the howling signal to a processor when the frequency of the audio signal belongs to the set bandwidth; the processor sends a control signal to a rejection trap according to the received howling signal; the rejection trap receives the audio signal and the control signal sent by the processor to suppress the frequency of the audio signal in order to acquire a howling-free audio signal and sends the howling-free audio signal to a wireless transmitting radio frequency device; and the wireless transmitting radio frequency receives and transmits the howling-free audio signal. Automatic frequency sweep is carried out on the audio signal through the band-pass filter, a frequency point ofthe howling is detected and the howling signal is sent to the processor, the processor sends the control signal to the rejection trap in order to determine the rejection frequency of the rejection trap, the howling can be suppressed on the premise that the transmission power loss is small, and the suppression effect is good.

The invention belongs to the field of hydraulic engineering, and relates to a pressure release valve provided with an adjusting device and capable of inhibiting howling. A spring (10) is arranged on avalve core (6) in a sleeving mode; a spring seat (2) is arranged on the spring (10) in a sleeving mode; the spring seat (2), the spring (10) and the valve core (6) are installed in a valve body (5);a valve seat (11) is inserted into the valve body (5) and makes contact with the valve body (5) in a positioning mode through a convex end surface; an adjusting stud (9) is screwed into the valve body(5) through a thread and makes contact with the left end of the valve core (6); an adjusting gasket (7) is gear internal meshing with the adjusting stud (9); and a hexagon socket head cap screw (8) is screwed into the valve body (5) through the adjusting gasket (7) so that the rotational degree of freedom, in the thread direction, of the adjusting stud (9) and the adjusting gasket (7) can be constrained. The pressure release valve is reliable in structure, and pressure adjusting is easy and convenient.

The invention discloses a variable-step-size hearing aid adaptive echo cancellation device and echo cancellation method, and the device comprises a single-frequency sound detector, a step size controller, and an adaptive filter. The single-frequency sound detector is used for carrying out the spectrum energy analysis of an error signal sample, calculating a current hearing aid system state parameter, and transmitting the parameters to a step length controller; the step length controller is used for judging the state of the system according to the system state parameter obtained from the single-frequency sound detector and the normalization error mean value, calculating a time-varying step length parameter of the adaptive filter, and transmitting the time-varying step length parameter to the adaptive filter; and the adaptive filter is used for filtering the cached far-end signal sample of the loudspeaker, calculating an estimated echo signal and outputting the estimated echo signal, anditeratively updating the adaptive filter according to the time-varying step parameter calculated by the step controller. The device and method solve the problems that an adaptive filter is low in convergence rate and too high in algorithm complexity and is difficult to realize in the prior art, and are suitable for a digital hearing aid system.

The invention discloses a microphone anti-whistling method and system based on inaudible sound waves. To achieve the effect of avoiding howling. The system includes an inaudible sound wave output module, an inaudible sound wave sampling module, a main control module, an audio output control module, a power amplifier, and a loudspeaker that are arranged on the microphone host. The inaudible sound wave output module, the inaudible sound wave sampling module, the audio The output control module is respectively connected with the main control module, and the audio output control module is connected with the speaker through the power amplifier. The present invention does not change the frequency response characteristics of the audio system, and can meet all high-demand occasions.

The invention discloses a howling suppression method, and the method comprises the following steps: obtaining an envelope detection signal corresponding to a howling segment in an audio input signal when the audio input signal is obtained; when the detection value of the envelope detection signal is less than or equal to a first preset value and greater than or equal to a second preset value, performing frequency shift processing on the howling segment; when the detection value of the envelope detection signal is greater than the first preset value, performing frequency shift processing and negative feedback processing on the howling segment; and outputting audio information according to the howling segment subjected to the frequency shift processing or the howling segment subjected to thefrequency shift processing and the negative feedback processing. The invention further discloses a howling suppression device and a storage medium, frequency shift processing and negative feedback processing are conducted on howling fragments according to changes of envelope detection signal detection values, formation of positive feedback feedback is destroyed, howling of sound is suppressed, and the howling suppression effect is better.

An embodiment of the application discloses a howlround preventive method and device, electronic equipment and a storage medium. The method includes: monitoring whether a target sound loop is present between first electronic equipment and second electronic equipment; if yes, determining whether howlround is present in the first and second electronic equipment according to the target sound loop anda sound signal received by the first electronic equipment; if yes, processing the sound signal in a preset howlround inhibition mode. By monitoring the target sound loop between the first electronic equipment and the second electronic equipment and the sound signal received by the second electronic equipment, it is possible to timely detect the howlround present in the first electronic equipment or the second electronic equipment; therefore, the howlround can be inhibited before worsening; the whole process has no need for cutting off sound input data, and howlround can be effectively prevented.

The invention relates to a howling suppression method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring a current audio signal corresponding to a current time period, and performing frequency domain transformation on the current audio signal to obtain a frequency domain audio signal; dividing the frequency domain audio signal to obtain sub-bands, and determining a target sub-band from the sub-bands; obtaining a current howling detection result and a current voice detection result corresponding to the current audio signal, and determining a sub-band gain coefficient corresponding to the current audio signal based on the current howling detection result and the current voice detection result; obtaining a historical sub-band gain corresponding to the audio signal in the historical time period, and calculating a current sub-band gain corresponding to the current audio signal based on the sub-band gain coefficient and the historical sub-band gain; and performing howling suppression on the target sub-band based on the current sub-band gain to obtain a first target audio signal corresponding to the current time period. By adopting the method, the howling suppression accuracy is improved.

The invention discloses a power amplifier system and a howling suppression circuit. The howling suppression circuit comprises a first filter, a second filter, a sine wave generator, a phase shifter, a first multiplier, a second multiplier, and a summator. The first filter and the second filter adjust the phases of input sound signals, so that the phase of the sound signal output by the first filter differs by 90 degree from the phase of the sound signal output by the second filter. The sound signal output by the first filter and a sine wave signal are multiplied through the first multiplier. The sound signal output by the second filter and a cosine wave signal are multiplied through the second multiplier. The sound signals output by the first multiplier and the second multiplier are added through the summator, so that the phases of the sound signals output by the first multiplier and the second multiplier are different from the phases of the sound signals input into the first filter and the second filter, so as to undermine conditions causing howling and suppress the howling.

The invention provides an inductor assembly, a preparation method of the inductor assembly and a display device. The inductor assembly comprises an inductor, the inductor comprises a magnetic core, a magnetic ring and a multi-turn coil, the magnetic core is provided with a first bearing part, a winding part and a second bearing part which are connected in sequence, the magnetic ring is connected with the first bearing part and the second bearing part, the multi-turn coil is wound around the winding part, and a first gap is formed between every two adjacent coils; and the damping part is used for filling at least partial area of the first gap. According to the inductor assembly provided by the invention, the vibration amplitude and frequency of the multi-turn coil can be reduced by filling at least part of the area of the first gap with the vibration reduction piece, so that howling generated in the working process of the inductor is inhibited or even eliminated.

The invention belongs to the field of hydraulic engineering, and relates to a pressure relief valve with an adjustment device capable of suppressing howling. A spring (10) is sleeved on a valve core (6), a spring seat (2) is sleeved on the spring (10), and the spring seat (2), the spring (10) and the valve core (6) are installed in the valve body (5), and the valve seat (11) is inserted into the valve body (5) and positioned in contact with the valve body (5) through the raised end surface; adjust The stud (9) is threaded into the valve body (5) and contacts with the left end of the valve core (6), the adjusting gasket (7) forms a gear internal mesh with the adjusting stud (9), and the hexagon socket cap screw ( 8) Screw into the valve body (5) through the through hole of the adjusting washer (7), so as to constrain the degree of freedom of rotation of the adjusting stud (9) and the adjusting washer (7) along the thread direction. The invention has reliable structure and convenient pressure adjustment.

The invention discloses a howling suppression method, a device, a sound amplification device and a storage medium for amplifying equipment. The howling suppression method for the sound amplification equipment is applied to the sound amplification equipment. The howling suppression method for the sound amplification equipment includes: Acquiring a speech signal to be amplified; performing sound field estimation on the speech signal through a preset adaptive filter to output a reference signal fed back to the amplifying device for howling suppression. The present invention estimates the feedback path of the sound field through the adaptive filter, which can realize the mutual cancellation of the artificially generated speech signal to be amplified and the reference signal actually fed back by the filter, thereby effectively reducing the feedback interference of the sound field and achieving the purpose of suppressing howling .

The embodiment of the invention discloses a signal processing method and a related product, which are applied to electronic equipment, the electronic equipment comprises a microphone array composed of M microphones and a single microphone, M is a positive integer, and the method comprises the following steps: collecting voice signals through the microphone array to obtain M first sound signals, fusing the M first sound signals to obtain a fused signal; performing subtraction operation on the fusion signal and an output signal of a self-adaptive filter to obtain a residual signal, the self-adaptive filter being used for simulating an external sound feedback path; inputting the residual signal, a second sound signal acquired by the single microphone and the fusion signal into a frequency domain processing module for processing to obtain an intermediate signal; and inputting the intermediate signal into a hearing aid algorithm module for processing to obtain a target signal. By adopting the embodiment of the invention, the hearing effect can be improved.

The invention discloses a voice signal processing method and device. The method includes the following steps: step 1, receiving a decoded far-end signal, and collecting a near-end signal while playing the decoded far-end signal; step 2, estimating and Compensate the delay and perform data alignment operation on the far-end and near-end signals; Step 3, send the aligned far-end and near-end signals to the adaptive echo suppression unit with feedback to suppress the echo in the near-end signals; Step 4, Suppressing the residual echo and howling in the near-end signal; step five, suppressing the noise in the near-end signal; step six, transmitting the near-end signal through the network, through the present invention, the echo, residual Echo, howling, and noise can be suppressed, and problems such as echo, howling, and noise in voice intercom can be solved with relatively low complexity.

The invention discloses an anti-howling system for an artificial intelligence conference, and particularly relates to the anti-howling field, the anti-howling system comprises an inner shell and an outer shell sleeving the inner shell, the inner shell is detachable, the top of the inner shell is provided with a loudspeaker used for sounding, the outer shell comprises a top plate attached to the top of the inner shell, and the top plate is provided with a plurality of through holes; the bottom of the edge of the top plate is provided with an interlayer part for sound insulation, a sound insulation plate is attached to the outside of the interlayer part, the interlayer part and the sound insulation plate are used for shielding a radiation area of the loudspeaker, the outer wall of the sound insulation plate is provided with a plurality of microphone heads, and the top and the bottom of the vacuum plate are provided with anti-howling assemblies. The anti-howling assemblies are used for separating the pickup areas of the plurality of microphone heads from the radiation area of the loudspeaker. According to the invention, when the microphone head is used, the sound playing area of the loudspeaker is avoided, the sound radiation area of the loudspeaker is not overlapped with the use area of the microphone head, and the effect of suppressing audio howling can be well realized.

The invention discloses a howling suppression method and system, a storage medium and earphone equipment. The howling suppression method comprises the following steps: extracting feature information in a sound signal picked up by a pickup microphone; inputting the feature information into a preset howling suppression neural network model so as to output path information of transmitting a sound signal of a loudspeaker to the pickup microphone through a howling suppression neural network model; and calculating a target sound signal picked up by the pickup microphone in the sound signals of the loudspeaker according to the path information, and eliminating the target sound signal from the sound signals picked up by the pickup microphone. The method and system do not affected by linear signals or non-linear signals, and can block the generation condition of the howling and suppress the howling.

An embodiment of the invention discloses an audio frequency data communication method, device and system and belongs to the technical field of communication. First communication links between a main device in a first audio frequency sub-meeting-place and other client ends in the first audio frequency sub-meeting-place are respectively established; via the first communication link, first sound mixing signals that are received are sent to the other client ends in the first audio frequency sub-meeting-place, and the other client ends are enabled to receive the first sound mixing signals synchronously; if the first sound mixing signals are played later than the time when the first sound mixing signals are received by the main device, then the first sound mixing signals tend to be played synchronously by all client ends in the first audio frequency sub-meeting-place, the first sound mixing signals are sound mixing signals of audio frequency signals of other audio frequency sub-meeting-places, a problem that audio feedback squeal and desynchrony are caused when sound of the audio frequency sub-meeting-place is played in the same audio frequency sub-meeting-place can be prevented, and mobile terminals such as mobile phones and the like can be used as client ends in each audio frequency sub-meeting-place.

The invention discloses a method and system for processing signals in network voice communication. The method comprises the steps that the voice signals of the network voice communication are received, and low-and-medium frequency signals are acquired from the voice signals according to voice frequency included in the voice signals the low-and-medium frequency signals are voice data with frequency components in the voice signals being within a low-and-medium threshold range; restraining power is obtained according to power, corresponding to low-and-medium frequency signals, in the voice signals; whether power, corresponding to high-frequency signals, in the voice signals is larger than the restraining power or not is judged, and if the power is larger than the restraining power, the power, corresponding to the high-frequency signals, in the voice signals is attenuated below the restraining power. According to the method and system, howling can be effectively restrained without affecting the fidelity of communication voice, and the processing speed of howling restraining can be improved.

The invention discloses a howling suppression method and a device thereof, electronic equipment and a storage medium. The method comprises the following steps: after acquiring a pickup audio signal which is picked up by a microphone and carries an original voice signal and a feedback voice signal of a loudspeaker, determining a target frequency shift trigonometric function value corresponding to a sampling rate of the pickup audio signal according to a preset mapping relationship between the sampling rate and the frequency shift trigonometric function value; and performing frequency shift on the pickup audio signal based on the target frequency shift trigonometric function value so as to suppress squeal generated after the acquisition signal of the target acquisition point is emitted by the loudspeaker. The calculation of a trigonometric function value in a digital signal processing system is avoided, and the howling suppression speed is improved.

The invention discloses a howling suppression method, which includes the following steps: when an audio input signal is acquired, acquiring an envelope detection signal corresponding to a howling segment in the audio input signal; When the detection value of the envelope detection signal is less than or equal to a first preset value and greater than or equal to a second preset value, frequency shift processing is performed on the howling segment; when the detection value of the envelope detection signal is When the value is greater than the first preset value, perform the frequency shift processing and negative feedback processing on the howling segment; according to the howling segment after the frequency shift processing or the frequency shift processing and the negative feedback The processed howling segment outputs audio information. The invention also discloses a howling suppressing device and a storage medium. According to the change of the detection value of the envelope detection signal, frequency shift processing and negative feedback processing are performed on the howling segment, which destroys the formation of positive feedback and suppresses the sound Howling, and the suppression effect of howling is better.