WO2006128768A1 - Loudspeaker driver with integrated microphone - Google Patents

Loudspeaker driver with integrated microphone Download PDF

Info

Publication number
WO2006128768A1
WO2006128768A1 PCT/EP2006/061999 EP2006061999W WO2006128768A1 WO 2006128768 A1 WO2006128768 A1 WO 2006128768A1 EP 2006061999 W EP2006061999 W EP 2006061999W WO 2006128768 A1 WO2006128768 A1 WO 2006128768A1
Authority
WO
WIPO (PCT)
Prior art keywords
means
microphone
membrane
driver
motor
Prior art date
Application number
PCT/EP2006/061999
Other languages
French (fr)
Inventor
Francis Renard
Original Assignee
Thomson Licensing
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to EP05291203 priority Critical
Priority to EP05291203.7 priority
Application filed by Thomson Licensing filed Critical Thomson Licensing
Publication of WO2006128768A1 publication Critical patent/WO2006128768A1/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06Loudspeakers
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/08Microphones
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10Applications
    • G10K2210/106Boxes, i.e. active box covering a noise source; Enclosures
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10Applications
    • G10K2210/108Communication systems, e.g. where useful sound is kept and noise is cancelled
    • G10K2210/1081Earphones, e.g. for telephones, ear protectors or headsets
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10Applications
    • G10K2210/108Communication systems, e.g. where useful sound is kept and noise is cancelled
    • G10K2210/1082Microphones, e.g. systems using "virtual" microphones
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30Means
    • G10K2210/321Physical
    • G10K2210/3212Actuator details, e.g. composition or microstructure
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30Means
    • G10K2210/321Physical
    • G10K2210/3214Architectures, e.g. special constructional features or arrangements of features
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30Means
    • G10K2210/321Physical
    • G10K2210/3219Geometry of the configuration
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30Means
    • G10K2210/321Physical
    • G10K2210/3229Transducers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/10Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1083Reduction of ambient noise

Abstract

A driver/microphone assembly is suggested, in which the microphone (2) is arranged centred with the motor (8, 9) of the driver (1 ) between the membrane (4) and the motor (8, 9). In order to provide coupling between the microphone (2) and the space on the other side of the membrane (4) an opening (13) is provided in the membrane (4), which is located above the microphone (2). The inventive overall assembly requires a reduced space. The contacting wires (12) of the microphone (2) are led to the rear side of the assembly through a borehole (14) in the driver's motor (8, 9). The invention can advantageously be used in active noise cancelling headsets.

Description

Loudspeaker driver with integrated microphone

The present invention relates in general to an electro-acoustical transducer and more particularly concerns a novel loudspeaker driver that can advantageously be used in active noise cancelling arrangements, has a compact structure and is relatively easy and inexpensive to fabricate.

Active noise cancelling systems make use of the fact that acoustic waves, which have the same amplitude but are reverse in phase cancel out each other. Typically, active noise cancelling systems are used in conjunction with a closed compartment that already has some noise blocking capability. The closed compartment is made in such a way that it surrounds the ears, thereby sealing the compartment from outside noise. In order to detect unwanted outside noise that enters the compartment despite of the sealing, a sound pickup, typically a microphone, is provided. The microphone is placed inside the closed compartment. For providing the best performance the microphone has to be placed as close as possible to the location where the sound cancelling effect is desired to be at a maximum.

Known active noise cancelling systems try to bring together the microphone and the transducer, which creates the inverse-phase noise, as close as possible by reducing the size of the driver and the microphone. A reduced-size driver, however, may have limited capabilities with regard to the maximum sound pressure level that can be achieved.

Another known approach to bring together the driver and the microphone is to place the microphone in front of the membrane of the driver. To this end a support is used that keeps the microphone in place. However, due to the space required for the microphone the driver has to be moved away from the ear. The active noise cancelling system thus becomes more bulky and less comfortable to wear. The microphone support further may have detrimental effects on the audio performance of the driver, e.g. the audio bandwidth. It is, therefore, an object of the invention to provide a new driver concept which both reduces the size of the complete arrangement and brings together the driver and the microphone as close as possible, thereby improving the noise cancelling capability.

The inventive driver/microphone arrangement includes a driver that is generally known from the prior art. A membrane and a motor are secured in a support. The motor includes a magnet and a voice coil, which can move freely in an air gap. The voice coil is connected to the membrane and moves the membrane in response to electrical signals applied to the voice coil. In the inventive arrangement, the magnet is provided with a recess that takes up the microphone. The recess is preferably located in the centre of the magnet. The membrane has an opening in the vicinity of the microphone. In this way, the microphone can pick up outside noise. Further, a borehole is provided in the magnet, which allows for electrical wires from the microphone to be run to the rear side of the assembly.

Numerous other features, objects and advantages of the invention will become apparent from the following specification when read in connection with the accompanying drawing in which:

FIG. 1 shows a driver/microphone arrangement known from the prior art; and FIG. 2 shows the driver/microphone arrangement according to the invention.

In the drawing, same or similar elements are referenced with the same reference symbols.

In figure 1 and a driver 1 and a microphone 2 are located underneath each other. The driver 1 includes a support 3, which supports a membrane 4. A voice coil 6 is attached to the membrane 4. The driver 1 further includes a motor assembly 7. The motor assembly 7 includes a magnet 8 and a motor pot 9, which forms a return circuit for the magnetic flux. The voice coil 6 can move freely in an air gap 11. Connecting wires 12 are provided, which allow contacting the voice coil 6 from the rear side of the assembly 1. In order to allow for a free movement of the membrane 4 without adverse effects of air compressed in the space confined by the membrane and the support 2 due to the membrane's displacement, a borehole 14 is provided in the magnet 8. The driver/microphone assembly shown in the figure obviously needs the space for the microphone 2 in addition to the space required for the driver assembly 1. Further, the microphone 2 is placed at a certain distance from the centre of the driver 1. The driver 1 and the microphone 2 are arranged inside the compartment mentioned further above, which is not shown in the figure.

In figure 2 a driver/microphone assembly according to the invention is shown. The assembly is arranged inside the compartment (not shown) as discussed with regards to figure 1. The driver 1 is essentially of the same construction as the driver shown in figure 1. In contrast to the known arrangement the magnet 8 is provided with a recess that takes up the microphone 2. In order to allow an acoustic coupling of the microphone 2 with the space inside the compartment, the membrane 4 has an opening 13 above the microphone 2. In this way, the driver 1 and the microphone 2 are located close together and are advantageously arranged on the same acoustical axis. The electrical wires 12 for connecting the microphone 2 are led through a borehole 14 in the motor towards the rear side of the assembly. The originally provided borehole 14 shown in figure 1 is now sealed by the microphone 2. However, the opening 13 in the membrane provides the same effect in the inventive assembly as the borehole 14 in the driver known from the prior art.

The invention allows for advantageously improving the sound performance of the microphone/driver arrangement in an active noise cancelling system, in particular in active noise cancelling headsets. In particular, avoiding holders to fix the microphone on an axis with the driver improves the frequency bandwidth. On the other hand, the microphone cannot be covered inadvertently by deformed or displaced ear cushions. Further, the microphone is placed as close as possible to the location, in which the noise cancelling effect is wanted to be maximised. Bringing together the microphone and the driver has the further advantage that the phase difference between the detected signal of the microphone and the sound produced by the membrane is minimised. Again further, the overall size of the assembly can be significantly reduced, and the production process and mounting of the assembly is facilitated.

Claims

Claims
1. Loudspeaker including
- motor means for responding to an input electrical signal by providing corresponding mechanical displacements;
- supporting means for supporting the motor means;
- membrane means coupled to the motor means for converting mechanical displacement of the motor means into acoustic energy, wherein the membrane means have a circular shape, wherein the membrane means are supported by the supporting means essentially at the outer circumference of the membrane means, and wherein the membrane means are located on one side of the motor means; characterised in that
- the membrane means have an opening essentially in the centre of the membrane;
- microphone means are placed essentially between the motor means and the membrane means;
- the microphone means are placed essentially centred to the membrane means.
2. The loudspeaker of claim 1 , characterised in that the motor means include a magnet, wherein the magnet has a recess that at least partially accommodates the microphone means.
3. The loudspeaker of claim 2, characterised in that the magnet has a through hole through which connection wires of the microphone means are guided to provide an accessible connection at the rear side of the magnet.
4. The loudspeaker of any one of the preceding claims, characterised in that first and second terminals are secured to the supporting means, wherein the first and second terminals are provided for connecting the loudspeaker and the microphone.
PCT/EP2006/061999 2005-06-03 2006-05-03 Loudspeaker driver with integrated microphone WO2006128768A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP05291203 2005-06-03
EP05291203.7 2005-06-03

Publications (1)

Publication Number Publication Date
WO2006128768A1 true WO2006128768A1 (en) 2006-12-07

Family

ID=36589168

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/061999 WO2006128768A1 (en) 2005-06-03 2006-05-03 Loudspeaker driver with integrated microphone

Country Status (1)

Country Link
WO (1) WO2006128768A1 (en)

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014158475A1 (en) * 2013-03-28 2014-10-02 Cirrus Logic, Inc. Systems and methods for locating an error microphone to minimize or reduce obstruction of an acoustic transducer wave path
WO2015059289A1 (en) * 2013-10-25 2015-04-30 Kaetel Systems Gmbh Earphone and method for producing an earphone
US9066176B2 (en) 2013-04-15 2015-06-23 Cirrus Logic, Inc. Systems and methods for adaptive noise cancellation including dynamic bias of coefficients of an adaptive noise cancellation system
US9264808B2 (en) 2013-06-14 2016-02-16 Cirrus Logic, Inc. Systems and methods for detection and cancellation of narrow-band noise
US9294836B2 (en) 2013-04-16 2016-03-22 Cirrus Logic, Inc. Systems and methods for adaptive noise cancellation including secondary path estimate monitoring
US9319784B2 (en) 2014-04-14 2016-04-19 Cirrus Logic, Inc. Frequency-shaped noise-based adaptation of secondary path adaptive response in noise-canceling personal audio devices
US9318094B2 (en) 2011-06-03 2016-04-19 Cirrus Logic, Inc. Adaptive noise canceling architecture for a personal audio device
US9319781B2 (en) 2012-05-10 2016-04-19 Cirrus Logic, Inc. Frequency and direction-dependent ambient sound handling in personal audio devices having adaptive noise cancellation (ANC)
US9318090B2 (en) 2012-05-10 2016-04-19 Cirrus Logic, Inc. Downlink tone detection and adaptation of a secondary path response model in an adaptive noise canceling system
US9324311B1 (en) 2013-03-15 2016-04-26 Cirrus Logic, Inc. Robust adaptive noise canceling (ANC) in a personal audio device
US9325821B1 (en) 2011-09-30 2016-04-26 Cirrus Logic, Inc. Sidetone management in an adaptive noise canceling (ANC) system including secondary path modeling
US9369798B1 (en) 2013-03-12 2016-06-14 Cirrus Logic, Inc. Internal dynamic range control in an adaptive noise cancellation (ANC) system
US9369557B2 (en) 2014-03-05 2016-06-14 Cirrus Logic, Inc. Frequency-dependent sidetone calibration
US9368099B2 (en) 2011-06-03 2016-06-14 Cirrus Logic, Inc. Bandlimiting anti-noise in personal audio devices having adaptive noise cancellation (ANC)
US9392364B1 (en) 2013-08-15 2016-07-12 Cirrus Logic, Inc. Virtual microphone for adaptive noise cancellation in personal audio devices
US9414150B2 (en) 2013-03-14 2016-08-09 Cirrus Logic, Inc. Low-latency multi-driver adaptive noise canceling (ANC) system for a personal audio device
US9460701B2 (en) 2013-04-17 2016-10-04 Cirrus Logic, Inc. Systems and methods for adaptive noise cancellation by biasing anti-noise level
US9479860B2 (en) 2014-03-07 2016-10-25 Cirrus Logic, Inc. Systems and methods for enhancing performance of audio transducer based on detection of transducer status
US9478210B2 (en) 2013-04-17 2016-10-25 Cirrus Logic, Inc. Systems and methods for hybrid adaptive noise cancellation
US9478212B1 (en) 2014-09-03 2016-10-25 Cirrus Logic, Inc. Systems and methods for use of adaptive secondary path estimate to control equalization in an audio device
US9532139B1 (en) 2012-09-14 2016-12-27 Cirrus Logic, Inc. Dual-microphone frequency amplitude response self-calibration
US9552805B2 (en) 2014-12-19 2017-01-24 Cirrus Logic, Inc. Systems and methods for performance and stability control for feedback adaptive noise cancellation
US9578415B1 (en) 2015-08-21 2017-02-21 Cirrus Logic, Inc. Hybrid adaptive noise cancellation system with filtered error microphone signal
US9578432B1 (en) 2013-04-24 2017-02-21 Cirrus Logic, Inc. Metric and tool to evaluate secondary path design in adaptive noise cancellation systems
US9620101B1 (en) 2013-10-08 2017-04-11 Cirrus Logic, Inc. Systems and methods for maintaining playback fidelity in an audio system with adaptive noise cancellation
US9633646B2 (en) 2010-12-03 2017-04-25 Cirrus Logic, Inc Oversight control of an adaptive noise canceler in a personal audio device
US9646595B2 (en) 2010-12-03 2017-05-09 Cirrus Logic, Inc. Ear-coupling detection and adjustment of adaptive response in noise-canceling in personal audio devices
US9666176B2 (en) 2013-09-13 2017-05-30 Cirrus Logic, Inc. Systems and methods for adaptive noise cancellation by adaptively shaping internal white noise to train a secondary path
US9704472B2 (en) 2013-12-10 2017-07-11 Cirrus Logic, Inc. Systems and methods for sharing secondary path information between audio channels in an adaptive noise cancellation system
US9773490B2 (en) 2012-05-10 2017-09-26 Cirrus Logic, Inc. Source audio acoustic leakage detection and management in an adaptive noise canceling system
US9824677B2 (en) 2011-06-03 2017-11-21 Cirrus Logic, Inc. Bandlimiting anti-noise in personal audio devices having adaptive noise cancellation (ANC)
US10013966B2 (en) 2016-03-15 2018-07-03 Cirrus Logic, Inc. Systems and methods for adaptive active noise cancellation for multiple-driver personal audio device
US10026388B2 (en) 2015-08-20 2018-07-17 Cirrus Logic, Inc. Feedback adaptive noise cancellation (ANC) controller and method having a feedback response partially provided by a fixed-response filter
US10181315B2 (en) 2014-06-13 2019-01-15 Cirrus Logic, Inc. Systems and methods for selectively enabling and disabling adaptation of an adaptive noise cancellation system
US10206032B2 (en) 2013-04-10 2019-02-12 Cirrus Logic, Inc. Systems and methods for multi-mode adaptive noise cancellation for audio headsets
US10219071B2 (en) 2013-12-10 2019-02-26 Cirrus Logic, Inc. Systems and methods for bandlimiting anti-noise in personal audio devices having adaptive noise cancellation
US10382864B2 (en) 2013-12-10 2019-08-13 Cirrus Logic, Inc. Systems and methods for providing adaptive playback equalization in an audio device
US10468048B2 (en) 2011-06-03 2019-11-05 Cirrus Logic, Inc. Mic covering detection in personal audio devices

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4644581A (en) * 1985-06-27 1987-02-17 Bose Corporation Headphone with sound pressure sensing means
EP0468610A2 (en) * 1990-07-27 1992-01-29 Mnc, Inc. Method and apparatus for performing noise cancelling in headphones
GB2267411A (en) * 1992-05-26 1993-12-01 Mark John Snee Noise reducing earphone with combined microphone/loudspeaker

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4644581A (en) * 1985-06-27 1987-02-17 Bose Corporation Headphone with sound pressure sensing means
EP0468610A2 (en) * 1990-07-27 1992-01-29 Mnc, Inc. Method and apparatus for performing noise cancelling in headphones
GB2267411A (en) * 1992-05-26 1993-12-01 Mark John Snee Noise reducing earphone with combined microphone/loudspeaker

Cited By (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9633646B2 (en) 2010-12-03 2017-04-25 Cirrus Logic, Inc Oversight control of an adaptive noise canceler in a personal audio device
US9646595B2 (en) 2010-12-03 2017-05-09 Cirrus Logic, Inc. Ear-coupling detection and adjustment of adaptive response in noise-canceling in personal audio devices
US10249284B2 (en) 2011-06-03 2019-04-02 Cirrus Logic, Inc. Bandlimiting anti-noise in personal audio devices having adaptive noise cancellation (ANC)
US10468048B2 (en) 2011-06-03 2019-11-05 Cirrus Logic, Inc. Mic covering detection in personal audio devices
US9824677B2 (en) 2011-06-03 2017-11-21 Cirrus Logic, Inc. Bandlimiting anti-noise in personal audio devices having adaptive noise cancellation (ANC)
US9711130B2 (en) 2011-06-03 2017-07-18 Cirrus Logic, Inc. Adaptive noise canceling architecture for a personal audio device
US9318094B2 (en) 2011-06-03 2016-04-19 Cirrus Logic, Inc. Adaptive noise canceling architecture for a personal audio device
US9368099B2 (en) 2011-06-03 2016-06-14 Cirrus Logic, Inc. Bandlimiting anti-noise in personal audio devices having adaptive noise cancellation (ANC)
US9325821B1 (en) 2011-09-30 2016-04-26 Cirrus Logic, Inc. Sidetone management in an adaptive noise canceling (ANC) system including secondary path modeling
US9318090B2 (en) 2012-05-10 2016-04-19 Cirrus Logic, Inc. Downlink tone detection and adaptation of a secondary path response model in an adaptive noise canceling system
US9721556B2 (en) 2012-05-10 2017-08-01 Cirrus Logic, Inc. Downlink tone detection and adaptation of a secondary path response model in an adaptive noise canceling system
US9773490B2 (en) 2012-05-10 2017-09-26 Cirrus Logic, Inc. Source audio acoustic leakage detection and management in an adaptive noise canceling system
US9319781B2 (en) 2012-05-10 2016-04-19 Cirrus Logic, Inc. Frequency and direction-dependent ambient sound handling in personal audio devices having adaptive noise cancellation (ANC)
US9773493B1 (en) 2012-09-14 2017-09-26 Cirrus Logic, Inc. Power management of adaptive noise cancellation (ANC) in a personal audio device
US9532139B1 (en) 2012-09-14 2016-12-27 Cirrus Logic, Inc. Dual-microphone frequency amplitude response self-calibration
US9369798B1 (en) 2013-03-12 2016-06-14 Cirrus Logic, Inc. Internal dynamic range control in an adaptive noise cancellation (ANC) system
US9955250B2 (en) 2013-03-14 2018-04-24 Cirrus Logic, Inc. Low-latency multi-driver adaptive noise canceling (ANC) system for a personal audio device
US9414150B2 (en) 2013-03-14 2016-08-09 Cirrus Logic, Inc. Low-latency multi-driver adaptive noise canceling (ANC) system for a personal audio device
US9502020B1 (en) 2013-03-15 2016-11-22 Cirrus Logic, Inc. Robust adaptive noise canceling (ANC) in a personal audio device
US9324311B1 (en) 2013-03-15 2016-04-26 Cirrus Logic, Inc. Robust adaptive noise canceling (ANC) in a personal audio device
WO2014158475A1 (en) * 2013-03-28 2014-10-02 Cirrus Logic, Inc. Systems and methods for locating an error microphone to minimize or reduce obstruction of an acoustic transducer wave path
US10206032B2 (en) 2013-04-10 2019-02-12 Cirrus Logic, Inc. Systems and methods for multi-mode adaptive noise cancellation for audio headsets
US9066176B2 (en) 2013-04-15 2015-06-23 Cirrus Logic, Inc. Systems and methods for adaptive noise cancellation including dynamic bias of coefficients of an adaptive noise cancellation system
US9294836B2 (en) 2013-04-16 2016-03-22 Cirrus Logic, Inc. Systems and methods for adaptive noise cancellation including secondary path estimate monitoring
US9462376B2 (en) 2013-04-16 2016-10-04 Cirrus Logic, Inc. Systems and methods for hybrid adaptive noise cancellation
US9460701B2 (en) 2013-04-17 2016-10-04 Cirrus Logic, Inc. Systems and methods for adaptive noise cancellation by biasing anti-noise level
US9478210B2 (en) 2013-04-17 2016-10-25 Cirrus Logic, Inc. Systems and methods for hybrid adaptive noise cancellation
US9578432B1 (en) 2013-04-24 2017-02-21 Cirrus Logic, Inc. Metric and tool to evaluate secondary path design in adaptive noise cancellation systems
US9264808B2 (en) 2013-06-14 2016-02-16 Cirrus Logic, Inc. Systems and methods for detection and cancellation of narrow-band noise
US9392364B1 (en) 2013-08-15 2016-07-12 Cirrus Logic, Inc. Virtual microphone for adaptive noise cancellation in personal audio devices
US9666176B2 (en) 2013-09-13 2017-05-30 Cirrus Logic, Inc. Systems and methods for adaptive noise cancellation by adaptively shaping internal white noise to train a secondary path
US9620101B1 (en) 2013-10-08 2017-04-11 Cirrus Logic, Inc. Systems and methods for maintaining playback fidelity in an audio system with adaptive noise cancellation
WO2015059289A1 (en) * 2013-10-25 2015-04-30 Kaetel Systems Gmbh Earphone and method for producing an earphone
US10219071B2 (en) 2013-12-10 2019-02-26 Cirrus Logic, Inc. Systems and methods for bandlimiting anti-noise in personal audio devices having adaptive noise cancellation
US10382864B2 (en) 2013-12-10 2019-08-13 Cirrus Logic, Inc. Systems and methods for providing adaptive playback equalization in an audio device
US9704472B2 (en) 2013-12-10 2017-07-11 Cirrus Logic, Inc. Systems and methods for sharing secondary path information between audio channels in an adaptive noise cancellation system
US9369557B2 (en) 2014-03-05 2016-06-14 Cirrus Logic, Inc. Frequency-dependent sidetone calibration
US9479860B2 (en) 2014-03-07 2016-10-25 Cirrus Logic, Inc. Systems and methods for enhancing performance of audio transducer based on detection of transducer status
US9319784B2 (en) 2014-04-14 2016-04-19 Cirrus Logic, Inc. Frequency-shaped noise-based adaptation of secondary path adaptive response in noise-canceling personal audio devices
US10181315B2 (en) 2014-06-13 2019-01-15 Cirrus Logic, Inc. Systems and methods for selectively enabling and disabling adaptation of an adaptive noise cancellation system
US9478212B1 (en) 2014-09-03 2016-10-25 Cirrus Logic, Inc. Systems and methods for use of adaptive secondary path estimate to control equalization in an audio device
US9552805B2 (en) 2014-12-19 2017-01-24 Cirrus Logic, Inc. Systems and methods for performance and stability control for feedback adaptive noise cancellation
US10026388B2 (en) 2015-08-20 2018-07-17 Cirrus Logic, Inc. Feedback adaptive noise cancellation (ANC) controller and method having a feedback response partially provided by a fixed-response filter
US9578415B1 (en) 2015-08-21 2017-02-21 Cirrus Logic, Inc. Hybrid adaptive noise cancellation system with filtered error microphone signal
US10013966B2 (en) 2016-03-15 2018-07-03 Cirrus Logic, Inc. Systems and methods for adaptive active noise cancellation for multiple-driver personal audio device

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