Abstract: A device for detecting sound in the surroundings of an automobile, including a first structure-borne noise sensor, which is acoustically coupled to a first oscillating body at an outside of the automobile and provides a first audio signal, including a second audio signal, which represents sound from an interior of the automobile, and including a processing unit, which is configured to subtract at least the second audio signal from the first audio signal.

Abstract: An audio processing system includes at least one first microphone, at least one adaptive filter, and a processor. The at least one first microphone acquires a first audio signal and outputs a first signal based on the first audio signal. The first audio signal includes at least one of a first audio component generated at a first position and a second audio component generated at a second position different from the first position. The first signal is input to the at least one adaptive filter. The at least one adaptive filter outputs a passing signal based on the first signal. The processor, when executing a program stored in a memory, performs: making a determination of which of the first audio component and the second audio component the first audio signal includes more; and controlling a filter coefficient of the adaptive filter based on a result of the determination.

Abstract: A sound generation apparatus for an electrification vehicle and a method of use thereof are provided. In example embodiments, the sound generation apparatus receives driving information, determines a driving situation based on the driving information, designs an acceleration sound when the driving situation is determined as an acceleration situation, or designs a cornering sound when the driving situation is determined as a cornering situation, and plays and outputs the acceleration sound or the cornering sound.

Abstract: A noise cancellation system for a vehicle, with a microphone for receiving noise and generating a corresponding noise signal; a loudspeaker for emitting an acoustic wave according to a cancellation signal to cancel the noise; a control unit comprising a memory and a controller; wherein the memory has a noise filter; and wherein the controller is configured to obtain at least a vehicle related information of the vehicle; to configure the noise filter based on the at least one vehicle related information; and to generate a cancellation signal based on the noise signal and the noise filter.

Abstract: A vehicle includes a first speaker, a data communications device, and an information processing device. The information processing device executes the followings: receiving a user operation to make a volume change of audio output from a first speaker provided in a vehicle, the user operation being input into a volume adjustment portion; and while the data communications device outputs audio from a second speaker, notifying the data communications device of the volume change made by the user operation input into a volume adjustment portion.

Abstract: A vehicle controller controls a power train of a vehicle and is configured to switch control of the power train between first control and second control. The second control reduces operating noise of the power train by a greater degree than the first control. The vehicle controller is configured to based on sounds in a passenger compartment, perform mood determination in order to determine whether an occupant of the vehicle is in a state of high tolerance for the operating noise or in a state of low tolerance for the operating noise; control the power train through the first control when determining that the occupant is in the state of high tolerance through the mood determination; and control the power train through the second control when determining that the occupant is in the state of low tolerance through the mood determination.

Abstract: For example, an apparatus may include an input to receive input information including a Heating, Ventilation and Air Conditioning (HVAC) input including HVAC configuration information corresponding to a configuration of an operation of an HVAC system of a vehicle; a plurality of noise inputs representing acoustic noise at a plurality of noise sensing locations; and a plurality of residual-noise inputs representing acoustic residual-noise at a plurality of residual-noise sensing locations within at least one sound control zone in the vehicle; a controller configured to determine a sound control pattern to control sound within the at least one sound control zone in the vehicle, the controller configured to determine the sound control pattern based on the HVAC input, the plurality of noise inputs and the plurality of residual-noise inputs; and an output to output the sound control pattern to a plurality of acoustic transducers.

Abstract: A sound control device mounted in a vehicle and control method include measuring a drive signal input to a speaker, wherein the drive signal is generated in response to an input signal including at least one of a noise control signal and an audio signal, estimating a state of a voice coil of the speaker including at least one of displacement and temperature of the voice coil, based on the drive signal and a model of the speaker, and adjusting the input signal based on the state of the voice coil.

Abstract: A simulation system and method for simulating a noise environment of a vehicle includes a memory configured to store a reference sample signal and a noise sample signal, a control unit electrically connected to the memory and configured to generate a reference signal based on the reference sample signal, generate a noise signal based on the noise sample signal, and transmit the reference signal to a noise control system, and a speaker electrically connected to the control unit and configured to convert the noise signal into a sound wave and output the sound wave.

Abstract: A method of generating a tire slip sound is capable of producing a virtual tire slip sound in a driving situation in which tire slip may occur during vehicle driving. The method includes collecting vehicle driving information while a vehicle is traveling; determining a characteristic of a virtual tire slip sound based on the collected vehicle driving information; generating and outputting a tire slip signal for generating and outputting the virtual tire slip sound according to the determined characteristic; and operating sound equipment of the vehicle according to the tire slip signal output from the controller to generate and output the virtual tire slip sound according to a vehicle driving state.

Abstract: The voice control device includes a sound source signal input unit, a frequency determination unit, a band controller, a sound image controller, and a voice output unit. The sound source signal input unit inputs a sound source signal of content from a sound source. The frequency determination unit determines a cutoff frequency. The band controller acquires a high frequency signal in a frequency band equal to or higher than the cutoff frequency and a low frequency signal in a frequency band equal to or lower than the cutoff frequency, from the sound source signal of the content. The sound image controller generates a plurality of sound image control signals for controlling sound images of the plurality of speakers, by controlling at least one of a phase and a sound pressure level of the high frequency signal. The voice output unit outputs the low frequency signal to a first speaker, and outputs the plurality of sound image control signals to a second speaker composed of a plurality of speakers.

Abstract: An active noise reduction device includes: a reference signal input terminal that receives a reference signal outputted by a reference signal source and having a correlation with noise in a space in an automobile, the reference signal source being attached to the automobile; a test signal source that outputs a test signal to a loudspeaker attached to the automobile, the loudspeaker being used to output a canceling sound for reducing the noise; and an anomaly determiner that determines whether the reference signal source has an anomaly, based on the reference signal inputted from the reference signal source to the reference signal input terminal when the test signal is outputted to the loudspeaker.

Abstract: The invention relates to a sound-equipped headrest comprising —at least one woofer associated with an open rear part, comprising a rear grid and/or open cell or semi-open cell foam with a density of between 8 and 60 kg/m3, so that said at least one woofer is two-directional; and —at least one mid-range/tweeter, associated with a closed rear part comprising a solid wall and/or a closed cell foam so that at least one mid-range/tweeter is mono-directional.

Abstract: A system for generating a virtual engine sound may include a server having information on at least one review of the virtual engine sound, and a virtual engine sound generator to generate “my sound” by tuning the virtual engine sound based on information on customized design settings, to update a preset driver emotion model for each emotion evaluation area of the virtual engine sound, based on the information on the at least one review of the virtual engine sound, which is received from the server, and to update the virtual engine sound based on the “my sound” and the driver emotion model updated for each emotion evaluation area.

Abstract: An apparatus, method and computer program product provide a route using a map layer of one or more sound events. For example, the apparatus receives a user preference indicating a sound type, identifies a road segment associated with the sound type from a plurality of road segments, selects a subset from the plurality of road segments as a route based on association of the subset with respect to the road segment, and outputs the route.

Abstract: Systems and methods for selectively providing audio alerts via a speaker device are disclosed herein. A system plays first audio content through a speaker. A microphone captures second audio content comprising an alert. Output of the second audio content through the speaker is suppressed by using noise cancellation. The system identifies the alert within the second audio content and determines a priority level of the alert. The system determines, based on the priority level, that the alert should be reproduced, and audibly reproduces the alert via the speaker, with the first audio content or instead of the first audio content.

Abstract: A transfer function measuring method includes: outputting a first signal to each of a plurality of loudspeakers to cause the plurality of loudspeakers to simultaneously output sounds with mutually different frequencies; acquiring second signals output from a microphone as a result of acquiring the sounds with the mutually different frequencies; and calculating a transfer function of each of the sounds with the mutually different frequencies based on the first signal and the second signals.

Abstract: A boat includes a controller that is communicatively coupled to a control screen. The controller has stored therein a plurality of modes corresponding to an activity and includes a plurality of controls corresponding to the activity. The controller is configured to display on the control screen, when one of the modes is activated, the plurality of controls for the activated mode. The activated mode may also be an operating mode that corresponds to an operational condition of the boat. The boat may include a processor that is configured to generate an adjusted audio signal by selecting one or more of a plurality of subranges of frequencies of an audio signal and adjusting the selected subranges to compensate for at least one environmental condition associated with the operational condition of the boat corresponding to the operating mode.

Abstract: Provided is a sound collection loudspeaker apparatus that makes it possible to intuitively distinguish which talker is talking, and improve the comfort of conversations, when performing in-vehicle conversation and conversations with people outside of a vehicle. The sound collection loudspeaker apparatus is installed in a vehicle. Two or more sound collection and amplification positions are assumed to be present inside the vehicle.

Abstract: The present disclosure relates to a noise control apparatus, vehicle having the same and method for controlling the vehicle to reduce indoor noise. In accordance with an aspect of disclosure, the vehicle collects sound by using a sound collector while driving the vehicle; detects vibration occurring in the vehicle by using a vibration detector; detects an occupant in the vehicle by using an occupant detector; generates a virtual reference signal based on an actual reference signal for the detected vibration; acquires location information of the occupant's ear based on the occupant information; generates a virtual error signal based on the acquired ear location information and the actual noise signal for the collected sound; generates a noise control signal based on the virtual error signal and the virtual reference signal; and outputs the generated noise control signal as sound.

Abstract: The purpose of the present invention is to provide a glass sheet composite having satisfactory acoustic performance. The present invention relates to a glass sheet composite including a diaphragm that is vibrated by a vibrator, and a support member that is attached along an edge portion of the diaphragm to support the diaphragm, in which the diaphragm includes at least one glass sheet, and is supported on the support member through a fixing part that fixes the edge portion of the diaphragm to the support member, and a vibration-permitting part that permits vibration of the diaphragm.

Abstract: A method of playing a virtual after-burn sound in an electric vehicle is provided. The method includes acquiring driver tendency information generated based on information of music played in a mobile phone and collecting driving variable information for playing a virtual sound during operation of the electric vehicle. Additionally, characteristics of a virtual after-burn sound are determined based on the collected driving variable information. The characteristics of the virtual after-burn sound are corrected according to the acquired driver tendency information. An after-burn signal is generated for playing the virtual after-burn sound based on information about the corrected characteristics of the virtual after-burn sound and operation of sound equipment is adjusted according to the created after-burn signal such that a virtual after-burn sound discriminated according to the driver tendency is played and output from the sound equipment.

Abstract: A headrest for a vehicle seat includes: a support surface for the head of an occupant; at least one lateral edge extending along an edge of the support surface; and a sound diffusion system arranged in a cavity in the edge and including a speaker configured to emit sound waves in front of the support surface and at least one passive radiator configured to emit low frequency sound waves in front of the support surface.

Abstract: A system for controlling an electric machine of a vehicle includes, among other things, a controller module configured to attenuate noise from the electric machine by altering a corrective voltage in response to feedback about the noise. The corrective voltage and a fundamental voltage command are supplied to the electric machine as a combined voltage command. The corrective voltage is on a harmonic adjacent to a harmonic of the noise. A method of controlling noise associated with an electric machine of a vehicle includes, among other things, altering a corrective voltage to attenuate noise in response to feedback about the noise. The corrective voltage and a fundamental voltage command are supplied to the electric machine as a combined voltage command. The corrective voltage is on a harmonic adjacent to a harmonic of the noise.

Abstract: A method for controlling at least two mechanical oscillators, more particularly in a motor vehicle, where each oscillator oscillates at a frequency during operation and where the frequency can be controlled by the power applied to the oscillators, includes arranging a single sound transducer at a distance from the oscillators and capturing an electrical signal, where the electrical signal is subjected to a Fourier transform and thus a Fourier spectrum is determined. The frequency of each oscillator is determined from extreme values of the Fourier spectrum.

Abstract: Various implementations include systems for processing microphone audio signals for a wearable audio device. In particular implementations, a method for processing signals includes: capturing an internal signal with an inner microphone configured to be acoustically coupled to an environment inside an ear canal of a user; extracting a low frequency audio signal from the internal signal; capturing an external signal with an external microphone configured to be acoustically coupled to an environment outside the ear canal of the user; extracting a high frequency audio signal from the external signal; and mixing the high frequency audio signal with the low frequency audio signal.

Abstract: An audio system for a seat headrest includes N speaker(s), each configured to be integrated into a seat headrest, N being an integer greater than or equal to 1, and an audio processing device including an electronic transmission channel connected to the speaker(s) and configured to transmit at least one audio stream via the speaker(s). The audio system comprises P microphone(s), each configured to be integrated into the headrest, P being an integer greater than or equal to 1. The audio processing device further includes an electronic receiving channel connected to the microphone(s) and configured to receive at least one sound signal via the P microphone(s).

Abstract: An agent system includes: a recognizer configured to recognize speech including speech contents of an occupant in a mobile object; an acquirer configured to acquire an image including the occupant; and an estimator configured to compare wording included in the speech contents of the occupant recognized by the recognizer with unclear information which is stored in a storage and includes wording making the speech contents unclear, to estimate a first direction which is a sight direction of the occupant or a second direction which is indicated by the occupant on the basis of the image acquired by the acquirer when the speech contents of the occupant includes unclear wording, and to estimate an object which is located in the estimated first direction or the estimated second direction. The recognizer is configured to recognize the speech contents of the occupant on the basis of the object estimated by the estimator.

Abstract: A method and an apparatus for active noise suppression in a vehicle. The apparatus includes an actuator in the vehicle and a part of the vehicle. The part of the vehicle is designed according to a first transfer function, which characterizes a transmission behavior of the part of the vehicle for sound. At least a part of the actuator is configured according to a second transfer function, which characterizes a transmission behavior of the at least one part for sound. The actuator is controllable in dependence on a control variable for active noise suppression.

Abstract: A vehicle that efficiently prevents a driver from eavesdropping a voice of a passenger may include: a driver's seat having a headrest speaker in a headrest thereof; the headrest speaker configured to output a sound, a front passenger seat, at least one rear passenger seat; a microphone configured to detect a voice of the passenger seated on the at least one rear passenger seat; and a controller configured to generate a masking curve based on the voice of the passenger and output a masking sound corresponding to the masking curve by controlling the headrest speaker.

Abstract: An electric actuator for use with a variable drive apparatus is disclosed herein. The electric actuator has a rotary design incorporating a magnetic field sensor chip disposed on a circuit board to sense the rotational orientation of the magnetic field of a cylindrical diametric magnet positioned on the end of a control shaft of a hydrostatic drive unit. The circuit board includes a microprocessor, electric motor power control and CAN Bus communication capability. The gear housing of the electric actuator features an integral end cap to accommodate mounting of the electric motor to enable a compact design. A vibration damping apparatus may be utilized to improve integrity of signals generated by the magnetic field sensor chip.

Abstract: A vehicle according to an embodiment of the present invention may comprise: a microphone; a plurality of speakers; a memory for storing a sound field table including corresponding relationship between filter set values, virtual sound items, and boarding items; and a processor for receiving a sound signal via the microphone, determining a first filter set value matched to characteristics of the received sound signal, by using the sound field table, and controlling outputs of the plurality of speakers so as to output sound according to the determined first set value.

Abstract: A vehicle-implemented noise-cancellation system, includes: a noise-cancellation system disposed in a vehicle, the noise-cancellation system comprising an adaptive filter being adjusted according to a reference signal and an error signal, the adaptive filter outputting a noise-cancellation signal, which, when transduced into a noise-cancellation audio signal by a speaker, cancels road noise within at least one zone within a cabin of the vehicle; and an adjustment module configured to vary a power of the noise-cancellation signal or a rate of adaptation of the adaptive filter from a first value to a second value, passing through at least one intermediate value between the first value and the second value, based on a time-varying signal indicative of a signal-to-noise ratio of the reference signal with respect to a first criterion.

Abstract: A method, computer program product, and computing system for receiving a plurality of predefined beams associated with a microphone array. A plurality of predefined nulls associated with the microphone array may be received. One or more predefined beams from the plurality of predefined beams or one or more predefined nulls from the plurality of predefined nulls may be selected. A microphone array may obtain audio encounter information, via the microphone array, using at least one of the one or more selected beams and the one or more selected nulls.

Abstract: A system for evaluating a noise management module of a vehicle includes a controller programmed to filter speaker signals from the noise management module using an auralization model to produce auralized sound signals that create a spatial effect to simulate sound in the vehicle at a predetermined position within the vehicle that is different than the positions corresponding to microphones used by the noise management module.

Abstract: Engine controllers and methods are described that facilitate skip fire control of an internal combustion engine. An engine controller determines a skip fire firing fraction and (as appropriate) associated engine settings that are suitable for delivering a requested output. The engine controller selects an operational firing fraction from a set of available firing fractions. A firing controller then directs cylinder firings in a skip fire manner that delivers the selected operational firing fraction. The firing controller includes an accumulator that helps smooth transitions between different firing fractions.

Abstract: With respect to a noise reduction device using a speaker and a microphone corresponding to each seat in a vehicle to reduce a noise in each seat, the noise reduction device includes, a signal processing unit configured to generate a canceling sound that reduces a noise at an ear of an occupant in a predetermined seat by using an auxiliary filter, an operation setting unit configured to disable operations of a speaker and a microphone corresponding to each empty seat in the vehicle, and an auxiliary filter setting unit configured to change a setting value of the auxiliary filter used by the signal processing unit to generate the canceling sound in accordance with the number of occupants in seats other than the predetermined seat, the seats affecting the noise in the predetermined seat.

Abstract: A noise reducing system for a tracked vehicle, the tracked vehicle comprising a cab and at least one track that extends along a direction of travel of the vehicle and comprises at least a plurality of bars, such as metal bars, transverse to the direction of travel. The noise reducing system comprising a control unit and an acoustic wave emitter connected to the control unit for being controlled by the control unit, the noise reducing system comprising an acoustic input and being configured to emit an acoustic equalization wave, phase shifted with respect to the noise and determined on the basis of the acoustic input, to reduce the noise, in particular the noise generated by the tracks.

Abstract: An electronic device comprising circuitry configured to obtain an audio signal of a first passenger of a vehicle and to control a loudspeaker array to generate at least one virtual sound source that reproduces the audio signal obtained from the first passenger, the virtual sound source being provided for a second passenger.

Abstract: A system for actively mitigating a buffeting noise in an occupant compartment of a vehicle when the vehicle is moving. The system is configured to determine an estimated effective volume of the occupant compartment, and to determine if a single window of the vehicle occupant compartment is open. Responsive to a determination that a single window of the vehicle occupant compartment is open, and using the estimated effective volume of the occupant compartment, an estimated buffeting noise frequency is determined. Responsive to the estimated buffeting noise frequency, the system determines characteristics of a sound configured to cancel a buffeting noise generated inside the occupant compartment while the vehicle is moving. The system may then control operation of a noise cancelling signal generating system to generate the sound having characteristics configured to cancel the buffeting noise inside the occupant compartment.

Abstract: An input signal representative of an undesired acoustic noise in a region is captured by one or more first sensors and processed to generate a cancellation signal. An output signal is generated based on the cancelation signal to cause one or more acoustic transducers to cancel, at least in part, the undesired acoustic noise in the region. A feedback signal representative of residual acoustic noise in the region is captured by one or more second sensors. A characteristic of each of the feedback signal, the cancellation signal, and a combination of the cancellation signal and the feedback signal is determined. One or more thresholds are compared to a ratio of (i) the characteristic of the combination of the cancellation signal and the feedback signal and (ii) a combination of the characteristic of the feedback signal and the characteristic of the cancellation signal to determine a convergence state.

Abstract: The present disclosure provides an active noise reduction method, a system, and a new energy vehicle. The active noise reduction method includes: obtaining a frequency of a high-frequency noise signal in an acoustic environment, constructing and generating a harmonic masking signal according to the frequency of the high-frequency noise signal, where the harmonic masking signal includes a harmonic signal and a masking signal, and the harmonic signal is a subharmonic wave of the high-frequency noise signal, and inputting the harmonic masking signal into a sound playback apparatus for playback to output a noise reduction construction sound, and performing noise reduction on the acoustic environment.

Abstract: A system for controlling an engine tone by an artificial intelligence based on a sound quality index of a vehicle may include a sound output device for generating a reinforcing sound to reinforce an engine sound of the vehicle; an engine characteristic measurement sensor for measuring sound source characteristics of the engine sound; an interior noise measurement sensor for detecting interior noise of the vehicle; a signal processing controller that receives signals from the engine characteristic measurement sensor in real time and controls the sound output device such that the engine sound reaches a target tone; and a tone control operation unit connected to the signal processing controller to optimize the sound quality index such that the engine sound reaches the target tone through the artificial intelligence.

Abstract: A vehicle sound control device includes: a motor rotation speed detector (2) configured to detect the rotation speed of a motor that drives a vehicle; a speaker (4) configured to produce a vehicle interior sound including a motor sound changing in accordance with the rotation speed of the motor in an interior of the vehicle; an emphasizing order setting unit (6) configured to determine an order component to be emphasized in the motor sound in accordance with the rotation speed detected by the motor rotation speed detector (2); and a vehicle interior sound control unit (7) configured to control the vehicle interior sound produced by the speaker (4) so that the emphasizing order component determined by the emphasizing order setting unit (6) is emphasized. The emphasizing order setting unit (6) determines the order component to be emphasized so that a higher order component is emphasized as the rotation speed increases.

Abstract: A vehicle includes a passenger capsule, a seat, and a sound suppression system. The passenger capsule includes a headliner. The seat is positioned within the passenger capsule. The seat includes a headrest. The sound suppression system includes one or more speakers and a controller. The one or more speakers are at least one of (i) positioned within the headrest or (ii) positioned within the headliner. The controller is configured to control the one or more speakers to emit sound waves having at least one of a target frequency or a target amplitude to generate a noise suppression zone that projects outward from at least one of the headrest or the headliner toward a passenger sitting in the seat to suppress one or more low frequency sound waves perceived by the passenger.

Abstract: Skip fire engine control using a first order sigma delta based firing controller is described. An engine controller determines a skip fire firing fraction and (as appropriate) associated engine settings that are suitable for delivering a requested output. The operational firing fraction is selected from a set of available firing fractions. The engine controller uses a first order sigma delta based converter to direct working cycle firings in a skip fire manner that delivers the selected firing fraction. The converter includes or functions substantially equivalent to a first order sigma delta converter and may be implemented any of: algorithmically using a processor; using digital, analog or hybrid components; using a lookup table; or using other appropriate techniques. In some embodiments firing decisions are made on a working cycle by working cycle basis. The described approach may be used in gasoline engines, diesel engines, turbocharged or supercharged engines, or others.

Abstract: Disclosed herein are a method for extracting voice signals of a plurality of users, and a terminal device and a robot implementing the same. The robot includes a plurality of microphones respectively corresponding to a plurality of users, a memory and a processor, where the processor extracts a plurality of voice signals output by each of the plurality of users using a plurality of sound signals received by each of the plurality of microphones, and in this case, the processor reverses a phase of at least one of other sound signals received respectively by at least one of other microphones except an i-th microphone, and extracts an i-th voice signal output by an i-th user corresponding to the i-th microphone based on a i-th sound signal received by the i-th microphone and based on at least one of other sound signals, the phase of which is reversed.

Abstract: A noise controller includes: a noise detector; a control filter that performs signal processing on a noise signal using a control factor; a speaker that reproduces an output signal from the control filter; an error microphone that detects a residual noise at a control point; a transmission characteristics correction filter that performs signal processing on the noise signal, using characteristics of sound transmission from the speaker to the error microphone; a factor updater that updates the control factor; a correction filter that performs signal processing on an output signal from the control filter, using the characteristics of sound transmission; a subtractor that subtracts, from an error signal indicative of the residue noise, an output signal from the correction filter; and an effect measuring unit that measures a noise reduction effect at the control point based on a difference between an output signal from the subtractor and the error signal.

Abstract: An audio system including an accelerometer positioned to produce an accelerometer signal representative of road noise within a vehicle cabin; a microphone operably positioned within the vehicle to receive the road noise and to produce a microphone signal having a road-noise component; and a cabin road-noise canceler, comprising a cabin road-noise cancellation filter, configured to receive the accelerometer signal and to produce a cabin road-noise cancellation signal, wherein the cabin road-noise cancellation signal is provided to an acoustic transducer for transduction of an acoustic road-noise cancellation signal, the acoustic road-noise cancellation signal minimizing the road noise within at least one cancellation zone in the vehicle cabin; a microphone road-noise canceler, comprising a microphone road-noise cancellation filter, configured to receive the cabin road-noise signal and the microphone signal and to minimize the road-noise component of the microphone signal according to the cabin road-noise cance

Abstract: An adaptive filter calculates frequency domain coefficients and in the frequency domain dynamically adjusts a leakage/step size parameter that controls adaptation of the adaptive filter based on the calculated frequency domain coefficients (e.g., based on a peak magnitude of the coefficients among frequency bins or on the magnitude of the coefficient of the corresponding frequency bin). The adaptive filter calculates the coefficients based on frequency domain input and error signals, dynamically adjusts a frequency domain coefficient magnitude limit parameter based on the calculated frequency domain coefficients (e.g., approximately proportionally to a peak magnitude of the coefficients among frequency bins) and uses the dynamically adjusted frequency domain coefficient magnitude limit parameter to limit a magnitude of the calculated frequency domain coefficients. The limit may be engaged above a frequency bin based on the peak magnitude frequency bin. An ANC system may employ the filter.