EP2945399B1 - Audiokopfhörer mit aktiver anc-geräuschkontrolle mit vorbeugung gegen sättigungseffekte eines feedback-mikrophonsignals - Google Patents

Audiokopfhörer mit aktiver anc-geräuschkontrolle mit vorbeugung gegen sättigungseffekte eines feedback-mikrophonsignals Download PDF

Info

Publication number
EP2945399B1
EP2945399B1 EP15166492.7A EP15166492A EP2945399B1 EP 2945399 B1 EP2945399 B1 EP 2945399B1 EP 15166492 A EP15166492 A EP 15166492A EP 2945399 B1 EP2945399 B1 EP 2945399B1
Authority
EP
European Patent Office
Prior art keywords
signal
equalization
feedback
microphone
filter
Prior art date
Legal status (The legal status 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 status listed.)
Not-in-force
Application number
EP15166492.7A
Other languages
English (en)
French (fr)
Other versions
EP2945399A1 (de
Inventor
Phong Hua
Vu Hoang Co Thuy
Pierre Guiu
Benoit Pochon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Parrot Drones SAS
Original Assignee
Parrot Drones SAS
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
Application filed by Parrot Drones SAS filed Critical Parrot Drones SAS
Publication of EP2945399A1 publication Critical patent/EP2945399A1/de
Application granted granted Critical
Publication of EP2945399B1 publication Critical patent/EP2945399B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods 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
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1008—Earpieces of the supra-aural or circum-aural type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1083—Reduction of ambient noise
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/033—Headphones for stereophonic communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00—Details of connection covered by H04R, not provided for in its groups
    • H04R2420/01—Input selection or mixing for amplifiers or loudspeakers

Definitions

  • the present invention relates to an audio headset comprising an "active noise control" system.
  • Such a headset can be used for listening to an audio source (music for example) from a device such as an MP3 player, radio, smart-phone, etc. to which it is connected by a wired connection or by a wireless link, in particular a connection of the Bluetooth type (trademark of the Bluetooth SIG).
  • the headset transducer then reproduces the voice of the remote speaker with which the wearer of the headset is in conversation.
  • the headset usually includes two headphones joined by a hoop.
  • Each earpiece comprises a closed shell housing a sound reproduction transducer (hereinafter simply referred to as a "transducer”) and intended to be applied around the user's ear with the interposition of a circumaural pad isolating the ear of the ear. external sound environment.
  • a sound reproduction transducer hereinafter simply referred to as a "transducer”
  • ear-type earphones with an element to be placed in the ear canal, thus having no cushion surrounding or covering the ear.
  • headphones type “headphones” with a transducer housed in a shell surrounding the ear helmet “circum-aural" or in support thereof (helmet “supra-aural")
  • this example should not be considered as limiting, the invention being able to be applied as well, as will be understood, to intra-ear headphones.
  • the headset When the headset is used in a noisy environment (metro, street, train, airplane, etc.) the wearer is partially protected from noise by the headphones headphones, which isolate it with the closed shell and the circumaural pad.
  • RDI Active Noise Control
  • the EP 2 597 889 A1 (Parrot) describes such a headset, equipped with an ANC system combining feedback type filtering , closed loop, and feed- forward, open loop.
  • the feedback filtering channel is based on a signal collected by a microphone placed inside the acoustic cavity delimited by the shell of the earphone, the circumaural pad and the transducer.
  • this microphone is disposed near the ear of the user, and mainly receives the signal produced by the transducer and the residual noise signal, unneutralized, still noticeable in the front cavity.
  • the signal from this microphone from which the audio signal of the music source to be reproduced by the transducer is subtracted, constitutes an error signal for the feedback loop of the ANC system.
  • the feedforward filtering channel uses the signal picked up by the external microphone to collect spurious noise in the helmet wearer's immediate environment.
  • a third filtering channel processes the audio signal from the music source to be reproduced.
  • the output signals of the three filter channels are combined and applied to the transducer to reproduce the signal of the musical source associated with a surrounding noise canceling signal.
  • the EP 2 518 724 A1 (Parrot) describes a combined microphone / headset type device, usable in particular for hands-free telephony functions.
  • the helmet is provided with a physiological sensor applied against the cheek or temple of the wearer of the helmet and receiving vocal vibrations which have the characteristic of being, by nature, very little corrupted by the surrounding noise.
  • the physiological sensor may be in particular an accelerometer placed on the inside of the skin of the earpiece of the earphone of the helmet, so as to be pressed against the cheek or the temple of the user with as close a coupling as possible .
  • the signal thus collected allows, after filtering and combination with signals picked up by conventional external microphones, to deliver to the communication system a speech signal from the nearby speaker (the helmet wearer) whose intelligibility has been greatly improved.
  • Another advantage of this sensor is the ability to use the signal it delivers to calculate a cutoff frequency of a dynamic filter.
  • the WO 2010/129219 A1 ( EP 2 425 421 A0 ) describes another apparatus, comprising an ANC system of adaptive type, that is to say using filters whose transfer function is dynamically modified, continuously, by a real-time analysis algorithm of the signal.
  • An external microphone placed on the shell of the earphones of the headset collects ambient noise, the level of which is analyzed to adjust the transfer function of the feedback filter to adapt to the noise prevailing in the external environment of the headphones.
  • This phenomenon occurs in particular when handling the helmet, or when the user is walking heavily or short.
  • the movements of the helmet then create excessive overpressures and depressions in the front cavity, which results in a strong electrical peak in the low frequencies.
  • the excessive signal picked up by the microphone creates in the ANC feedback filter a saturation leading to an audible signal or "plop" produced at the output by the transducer and unpleasant for the user.
  • the feedback ANC filter can attenuate these pitch noise resonances by amplifying the internal microphone signal but, when the steps become stronger, the electrical level of the microphone signal can exceed the limits of its normal operation and cause, here again, a saturation ANC filter and transducer.
  • This saturation can occur at several points in the signal processing chain: electrical overshoot of the input dynamics of the analog / digital converter, exceeding of the maximum digital value in the digital signal processor DSP, or else output saturation if the signal reproduced by the transducer exceeds the maximum value that can be produced by the digital / analog converter, each of these phenomena can cause a "plop" unpleasant.
  • Another object of the invention is to implement a digital (and not an analogue) technology as in the EP 2 597 889 A1 mentioned above) for such an ANC system, which can be implemented in particular within a digital signal processor (DSP).
  • DSP digital signal processor
  • FIG. 1 there is shown a headphone placed on the head of his user.
  • This headset comprises, in a conventional manner, two earphones 10, 10 'joined by a holding bar 12.
  • Each of the earphones 10 comprises an outer shell 14 which is applied to the contour of the ear of the user. , with interposition between the shell 14 and the periphery of the ear of a flexible circumaural pad 16 for providing a sound seal, acoustically, between the region of the ear and the external sound environment.
  • this example configuration of "headphone” type with a transducer housed in a shell surrounding the ear or resting on it should not be considered as limiting, the invention can also be well applied to ear-phones including an element to place in the ear canal, so headphones devoid of shell and cushion surrounding or covering the ear.
  • the Figure 2 is a schematic representation showing the different acoustic and electrical signals as well as the various functional blocks involved in the operation of an active noise control headphones.
  • the earphone 10 encloses a sound reproduction transducer 18, hereinafter referred to simply as a "transducer”, carried by a partition 20 defining two cavities, namely a front cavity 22 on the side of the ear and a rear cavity 24 on the opposite side. .
  • the front cavity 22 is defined by the inner partition 20, the wall 14 of the earpiece, the pad 16 and the outer face of the user's head in the region of the ear. This cavity is a closed cavity, with the exception of the inevitable acoustic leaks in the region of contact of the pad 16.
  • the rear cavity 24 is a closed cavity, with the exception of an acoustic vent 26 for obtaining a strengthening of low frequencies in the front cavity 22 of the earpiece.
  • an internal microphone 28 disposed closer to the auditory canal of the ear, to capture the residual noise present in the internal cavity 22, which noise will be perceived by the user.
  • the neutralization of the noise by the sound wave 34 is never perfect, the internal microphone 28 collects a residual signal which is used as an error signal e applied to a feedback filter branch 36 closed loop.
  • an external microphone 38 may be placed on the shell of the earphones of the headset, to capture the surrounding noise outside the earpiece, schematized by the wave 30.
  • the signal collected by this external microphone 38 is applied to a feedforward 40 filter stage of the active noise control system.
  • the signals from the feedback branch 36 and, if present, from the feedforward branch 40 are combined at 42 to drive the transducer 18.
  • the transducer 18 receives an audio signal to be reproduced from a musical source (walkman, radio, etc.), or the voice of the remote speaker, in a telephony application. Since this signal experiences the effects of the closed loop distorting it, it will have to be preprocessed by an equalization so as to present the desired transfer function, determined by the gain of the open loop and the target response without active control.
  • the helmet may possibly wear, as shown Figure 1 , another external microphone 44 for communication functions, for example if the headset is provided with "hands-free" telephony functions.
  • This additional external microphone 44 is intended to capture the voice of the wearer of the helmet, it does not intervene in the active control of the noise and, in the Next, it will be considered as an external microphone possibly used by the ANC system that the microphone 38 dedicated to active noise control.
  • the Figure 3 illustrates, in section, an exemplary embodiment of the various mechanical and electroacoustic elements schematically represented on the Figure 2 for one of the headphones 10 (the other headphone 10 'being made identically). It contains the partition 20 dividing the inside of the shell 14 into a front cavity 22 and a rear cavity 24 with, mounted on this partition, the transducer 18 and the internal microphone 28 carried by a gate 48 maintaining it nearby. of the ear canal of the user.
  • the object of the invention is to overcome the phenomenon, explained in the introduction, resulting from the sudden surges / depressions in the front cavity 22 which are likely to produce, especially in the low frequencies below 100 Hz, extreme overruns in the value the signal delivered by the internal microphone 28.
  • the Figure 4 illustrates an example of a signal delivered by the internal microphone 28, in this case an electret microphone which delivers a signal not exceeding 100 mV for a sound pressure of 110 dB SPL ( Sound Pressure Leve /).
  • this value can be very much exceeded (in the example, it reaches and exceeds 600 mV), which can produce after amplification saturation effects in several places of the chain treatment.
  • the basic idea of the invention is to detect upstream of the feedback filter, with a very low latency time, the situations likely to produce such signal peaks, in order to avoid all saturation phenomena during sudden movements. helmet, especially while the user is walking or running.
  • the Figure 5 schematically illustrates, in the form of functional blocks, the active noise control system ANC incorporating, according to the invention, an anti-saturation function to compensate for this phenomenon.
  • the feedback branch whose principle was described above with reference to the Figure 2 after scanning by means of an ADC converter 52 of the error signal e picked up by the internal microphone 28.
  • the digitized error signal is processed by a feedback filter 54, then converted into analog by the DAC 56 to be returned by the transducer 18 in the cavity of the earpiece 10.
  • the reproduced signal is optionally combined with a music signal M which, after equalization at 58, is combined at 60 with the noise cancellation signal for conversion by the DAC 56 and reproduction by the transducer 18.
  • the filtering operated by the blocks 54 (transfer function H feedback FB2 on the microphone signal) and 58 (transfer function H equalizer EQ2 music M) can be realized in particular as described in the application FR 14 53284 of 11.04.2014, in the name of the Applicant, entitled “Active noise control ANC noise headphones with electric breath reduction”, which proposes to implement a plurality of predetermined filter configurations, selectively switchable according to the signal captured by the internal microphone 28, so as to optimize the compromise between the more or less attenuation of the ambient noise and that of an electric breath also more or less strong, depending on the level and the spectral content of the signal returned to the user as collected by the microphone 28 placed in the front cavity 22 of the earpiece.
  • the active noise control ANC is controlled by an ANC module 62 which analyzes the signal e and adapts accordingly the transfer functions H FB2 of the feedback branch 54 and H EQ2 of the equalization branch 58 of the music signal.
  • control algorithm ANC 62 modifies the H EQ2 filter of the music equalization branch 58 at the same time as that of the feedback ANC branch 54 in order to rebalance the effects of the filtering. , of course if a music signal is present.
  • the active noise control processing ANC uses an accelerometer 64 mounted on the helmet ( Figures 2 and 5 ), the role of which will be to detect with a very low latency the movements of the earphone likely to produce saturation effects of the signal picked up by the internal microphone 28, typically movements resulting from the movements of the user while the latter walk, short, jump ... or when it manipulates the headphones, for example to readjust their position on his ears.
  • the EP 2 518 724 A1 (Parrot) describes a headset with an accelerometer built into an earpiece, but in this document the accelerometer is used as a physiological sensor to collect vocal components non-acoustically transmitted by bone conduction, so not noisy, a speech signal emitted by the user, for example in the case where the headset is used as a "hands-free" device in combination with a mobile phone.
  • this same accelerometer can be used, but with a different role, namely the improvement of the ANC function of the headphones, in a configuration of listening (sound reproduction) and not of speech (voice of the user).
  • the signal of the accelerometer 64 after scanning by means of an ADC converter 66, is applied to an "anti-saturation" module 68 which also receives the signal e collected by the internal microphone 28, after scanning by the ADC converter 52 .
  • the two acceleration and microphonic signals are analyzed jointly by the anti-saturation module 68, which controls a filter 70 (transfer function H FB1 ) placed in the feedback branch upstream of the actual feedback filter (block 54, function transfer H FB2 ), and likewise an equalization filter 72 (transfer function H EQ1 ) placed in the equalization branch upstream of the equalization filter (block 58, transfer function H EQ2 ).
  • the anti-saturation module 68 from these signals, defines the one of the X filters of the block 70 of the feedback branch that should be selected and, likewise, that of the Y filters of the block 72 of the equalization branch of the a music signal that should be selected (Y can be equal to X, but not necessarily).
  • the selection between the X filters of the transfer function H FB1 of the block 70 (or Y filters of the transfer function H EQ1 of the block 72) is as follows.
  • IIR infinite impulse response filter
  • the Figure 6 illustrates more precisely the elements implemented by the anti-saturation module 68 for the analysis of the signal and the selection of the filters of the blocks 70 and 72.
  • the digitized signal e collected by the internal microphone 28 is subjected to a frequency decomposition by a battery of filters 74 in order to calculate at 76 the energy Rms i of this signal e in each of its N frequency components.
  • Rms 1 may be the power of the microphone signal below 100 Hz
  • Rms 2 the signal power around 800 Hz, etc. which allows via spectral analysis to distinguish various significant situations: for example, for use of the headset in a noisy environment of transportation type (plane, train), the ratio between low and high frequencies is much greater than in an environment quieter as in an office.
  • the obtained values Rms 1 , Rms 2 ... Rms N are applied to a state machine 78, which compares these energy values with respective thresholds and determines, according to these comparisons, that of the X filters of the block 70 of the branch feedback and if appropriate (if music is present) that of Y filters block 72 of the equalization branch to be selected.
  • the Figure 7 illustrates more precisely how this state machine operates 78.
  • the power RMS acc of the signal of the accelerometer present on the helmet is, possibly after prefiltering, analyzed constantly. If this power exceeds a predetermined threshold Threshold a (test 80) then the state machine considers that the headset undergoes a movement that may result in saturation of the ANC control and triggers an anti-saturation control process, corresponding to the left side of the algorithm of the Figure 7 .
  • the state machine In the presence of an acceleration exceeding the prescribed threshold, the state machine analyzes the signal of the internal microphone 28. If the power RMS 1 (power of the microphonic signal in a certain frequency range) exceeds a predetermined threshold Threshold_1 (test 82) , then the state machine modifies the transfer function H FB1 of the feedback branch , for example by selecting one of the X filters which has the effect of reducing the attenuation ANC in the low frequencies, and also modifies the function of H EQ1 transfer of the equalizer branch to keep the same perception of the music (block 84).
  • Threshold_1 test 82
  • the RMS power 2 of the microphonic signal in another frequency band is tested in the same way (block 82 ') with respect to a second threshold Threshold_2 (with Threshold_2 ⁇ Threshold_1 ) . If RMS 2 > Threshold_2, then a modification of the transfer functions H FB1 and H EQ1 (block 84 ') is also applied, typically with an attenuation of the feedback ANC present, but less important than in the previous case.
  • test 82 iteratively with progressively lower thresholds, so as to choose, among the X selectable filters of the feedback branch H FB1 , that which will optimize the compromise between the attenuation of the ANC control and protection against saturation of it (block 84 ").
  • the state machine disables the anti-saturation modules 70 and 72 (block 88).
  • test 80 Assuming that, in test 80, the signal analysis of the accelerometer indicates that it does not exceed the prescribed threshold, if the anti-saturation treatment was active (test 90), then at the expiration of a timer of X1 seconds (test 92), this control is automatically deactivated by the state machine (block 94).
  • the Figures 8 and 9 illustrate two examples of transfer functions H FB1 applied to the feedback branch of the control ANC, without (A) and with (B) modification by the anti-saturation module 68: the Figure 8 represents, in amplitude and in phase, the transfer function H FB1 in these two cases, while the Figure 9 illustrates the corresponding attenuations obtained.
  • the detection of an acceleration triggers an attenuation of the gain of the feedback ANC branch of the order of 12 to 15 dB at 40 Hz between the curve A (without anti-saturation control) and the curve B (with anti-control -saturation).
  • the change is mainly made in the low frequencies, below 150 Hz, because it is in this range of frequencies that the resonances of footsteps, etc. are located. usually encountered in practice.
  • the anti-saturation control decreases, certainly, the attenuation performance of the ANC control but, in return, avoids the production of a very unpleasant "plop" output by the transducer due to the saturation of the control branch ANC feed - back.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Headphones And Earphones (AREA)

Claims (8)

  1. Headset, das enthält:
    - zwei Kopfhörer (10), die je einen Transducer (18) zur Tonwiedergabe eines wiederzugebenden Audiosignals aufweisen, wobei dieser Transducer in einem akustischen Ohrhohlraum (22) untergebracht ist;
    - mindestens ein Mikrofon, das ein erfasstes Signal liefern kann, welches eine akustische Rauschkomponente aufweist;
    - einen Bewegungssensor (64), der auf mindestens einen der Kopfhörer montiert ist und ein Beschleunigungssignal liefern kann; und
    - einen digitalen Signalprozessor, DSP, (50), der enthält:
    . Mischeinrichtungen (46), die am Eingang ein vom Mikrofon kommendes Signal sowie das wiederzugebende Audiosignal (S) empfangen und am Ausgang ein Signal liefern, das den Transducer (18) steuern kann; und
    . Rauschminderungseinrichtungen, die Einrichtungen (68) enthalten, die gleichzeitig i) das vom Mikrofon gelieferte Mikrofonsignal und ii) das vom Bewegungssensor (64) gelieferte Beschleunigungssignal analysieren und überprüfen können, ob laufende Merkmale dieser Mikrofon- und Beschleunigungssignale eine erste Gruppe von vorbestimmten Kriterien erfüllen oder nicht,
    dadurch gekennzeichnet, dass:
    - das Headset ein aktives Rauschsteuerungssystem, ANC, enthält;
    - das Mikrofon ein inneres ANC-Mikrofon (28) ist, das innerhalb des akustischen Hohlraums (22) angeordnet ist;
    - der DSP (50) enthält:
    . einen Rückkopplungs-Feedback-Zweig (36), der einen ANC-Feedback-Filter (54) enthält, der eine Filterungstransferfunktion (HFB) an das vom inneren ANC-Mikrofon (28) gelieferte Signal anwenden kann; und
    . die Mischeinrichtungen (46), die am Eingang das vom Feedback-Zweig am Ausgang des ANC-Feedback-Filters (54) gelieferte Signal sowie das wiederzugebende Audiosignal (S) empfangen, und am Ausgang das Signal liefern, das den Transducer (18) steuern kann; und
    - der DSP außerdem Einrichtungen zum Verhindern der Wirkungen einer Sättigung des vom inneren Mikrofon (28) gelieferten Signals auf den Feedback-Zweig enthält, die enthalten:
    . die Einrichtungen (68), die gleichzeitig i) das vom Mikrofon (28) gelieferte Mikrofonsignal und ii) das vom Bewegungssensor (64) gelieferte Beschleunigungssignal analysieren und überprüfen können, ob laufende Merkmale dieser Mikrofon- und Beschleunigungssignale eine erste Gruppe von vorbestimmten Kriterien erfüllen oder nicht; und
    . im Feedback-Zweig vor dem Feedback-ANC-Filter (54), einen Feedback-Antisättigungsfilter (70), der selektiv abhängig vom Ergebnis der Überprüfung der ersten Gruppe von Kriterien umgeschaltet werden kann.
  2. Headset nach Anspruch 1, wobei:
    - der Feedback-Antisättigungsfilter (70) einer von einer Vielzahl selektiv umschaltbarer, vorkonfigurierter Filter ist; und
    - der DSP (50) außerdem enthält:
    . Einrichtungen (68), die einen der vorkonfigurierten Antisättigungsfilter abhängig vom Ergebnis der Überprüfung der ersten Gruppe von Kriterien auswählen können.
  3. Headset nach Anspruch 1, wobei:
    - der DSP (50) außerdem enthält:
    . einen Entzerrungszweig, der einen Entzerrungsfilter (58) enthält, welcher eine Entzerrungsübertragungsfunktion (HEQ) an das wiederzugebende Audiosignal (M) vor dessen Anwendung an die Mischeinrichtungen (60) anwenden kann; und
    . im Entzerrungszweig vor dem Entzerrungsfilter (58) einen Entzerrungs-Antisättigungsfilter (72), der selektiv gleichzeitig mit dem Feedback-Antisättigungsfilter (70) umschaltbar ist.
  4. Headset nach Anspruch 1, wobei:
    - der Entzerrungs-Antisättigungsfilter (72) einer von einer Vielzahl von selektiv umschaltbaren vorkonfigurierten Entzerrungsfiltern ist; und
    - der DSP (50) weiter enthält:
    . Einrichtungen (68), die einen der vorkonfigurierten Entzerrungsfilter abhängig vom Ergebnis der Überprüfung der ersten Gruppe von Kriterien auswählen können.
  5. Headset nach Anspruch 1, wobei die laufenden Merkmale des Beschleunigungssignals einen Energiewert (Rmsacc) des Beschleunigungssignals enthalten, und die vorbestimmten Kriterien eine Schwelle (Seuil_a) enthalten, mit der der Energiewert verglichen wird.
  6. Headset nach Anspruch 5, wobei die laufenden Merkmale des Mikrofonsignals Energiewerte (Rms1, Rms2 usw.) des Mikrofonsignals in einer Vielzahl von jeweiligen Frequenzbändern (Filtre1, Filtre2 usw.) enthalten, und die vorbestimmten Kriterien eine Reihe von jeweiligen Schwellen (Seuil1, Seuil2 ... SeuilN) enthalten, mit denen die Energiewerte des Mikrofonsignals verglichen werden, wenn der Energiewert (Rmsacc) des Beschleunigungssignals die Schwelle (Seuil_a) überschreitet.
  7. Headset nach Anspruch 1, wobei:
    - der Feedback-ANC-Filter (54) einer von einer Vielzahl von selektiv umschaltbaren vorkonfigurierten Feedback-ANC-Filtern ist; und
    - der DSP (50) außerdem enthält:
    . Einrichtungen (62) zur Analyse des vom inneren Mikrofon gelieferten Signals, die überprüfen können, ob laufende Merkmale des vom inneren Mikrofon gelieferten Signals eine zweiten Gruppe von vorbestimmten Kriterien erfüllen oder nicht; und
    . Auswahleinrichtungen (62), die einen der vorkonfigurierten Feedback-ANC-Filter abhängig vom Ergebnis der Überprüfung der zweiten Gruppe von Kriterien auswählen können.
  8. Headset nach Anspruch 7, wobei:
    - der DSP (50) weiter enthält:
    . einen Entzerrungszweig, der einen Entzerrungsfilter (58) enthält, welcher eine Entzerrungsübertragungsfunktion (HEQ) an das wiederzugebende Audiosignal (M) vor dessen Anwendung an die Mischeinrichtungen (60) anwenden kann;
    - der Entzerrungsfilter (58) einer von einer Vielzahl von selektiv umschaltbaren vorkonfigurierten Entzerrungsfiltern ist; und
    - die Auswahleinrichtungen (62) ebenfalls einen der vorkonfigurierten Entzerrungsfilter abhängig vom ausgewählten laufenden Feedback-ANC-Filter auswählen können.
EP15166492.7A 2014-05-16 2015-05-06 Audiokopfhörer mit aktiver anc-geräuschkontrolle mit vorbeugung gegen sättigungseffekte eines feedback-mikrophonsignals Not-in-force EP2945399B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1454406A FR3021180B1 (fr) 2014-05-16 2014-05-16 Casque audio a controle actif de bruit anc avec prevention des effets d'une saturation du signal microphonique "feedback"

Publications (2)

Publication Number Publication Date
EP2945399A1 EP2945399A1 (de) 2015-11-18
EP2945399B1 true EP2945399B1 (de) 2016-10-12

Family

ID=51830392

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15166492.7A Not-in-force EP2945399B1 (de) 2014-05-16 2015-05-06 Audiokopfhörer mit aktiver anc-geräuschkontrolle mit vorbeugung gegen sättigungseffekte eines feedback-mikrophonsignals

Country Status (5)

Country Link
US (1) US9466281B2 (de)
EP (1) EP2945399B1 (de)
JP (1) JP2015219527A (de)
CN (1) CN105100990A (de)
FR (1) FR3021180B1 (de)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015166482A1 (en) 2014-05-01 2015-11-05 Bugatone Ltd. Methods and devices for operating an audio processing integrated circuit to record an audio signal via a headphone port
US11178478B2 (en) 2014-05-20 2021-11-16 Mobile Physics Ltd. Determining a temperature value by analyzing audio
KR20170007451A (ko) 2014-05-20 2017-01-18 부가톤 엘티디. 이어폰 출력 스피커로부터의 청각적 측정
GB201421291D0 (en) * 2014-12-01 2015-01-14 Soundchip Sa Earphone system
US20170110105A1 (en) 2015-10-16 2017-04-20 Avnera Corporation Active noise cancelation with controllable levels
FR3044197A1 (fr) 2015-11-19 2017-05-26 Parrot Casque audio a controle actif de bruit, controle anti-occlusion et annulation de l'attenuation passive, en fonction de la presence ou de l'absence d'une activite vocale de l'utilisateur de casque.
AU2017268930A1 (en) 2016-05-27 2018-12-06 Bugatone Ltd. Determining earpiece presence at a user ear
CN106643454A (zh) * 2016-12-05 2017-05-10 中国空间技术研究院 一种兼容高频高压反馈的电容式检驱一体化电路
WO2018163423A1 (ja) * 2017-03-10 2018-09-13 ヤマハ株式会社 ヘッドフォン
CN109729471A (zh) * 2017-10-27 2019-05-07 北京金锐德路科技有限公司 用于脖戴式语音交互耳机的anc降噪装置
WO2019134115A1 (zh) * 2018-01-05 2019-07-11 万魔声学科技有限公司 主动降噪方法、设备及耳机
CN108540887B (zh) * 2018-05-21 2019-12-20 歌尔股份有限公司 一种头戴式降噪耳机和降噪处理方法
JP7119210B2 (ja) 2018-08-02 2022-08-16 ドルビー ラボラトリーズ ライセンシング コーポレイション 能動ノイズ制御システムの自動較正
EP3742754B1 (de) * 2019-05-24 2023-09-27 Honeywell International Inc. Gehörschutzvorrichtungen, lautsprecher und lärmbelastungssensoren dafür sowie sensorgehäuse und zugehörige verfahren dafür
US20240054986A1 (en) 2020-12-25 2024-02-15 Panasonic Intellectual Property Management Co., Ltd. Earphone and earphone control method
WO2023274525A1 (en) * 2021-06-30 2023-01-05 Huawei Technologies Co., Ltd. Active noise reduction headphones and method
US11589154B1 (en) * 2021-08-25 2023-02-21 Bose Corporation Wearable audio device zero-crossing based parasitic oscillation detection
CN114501221A (zh) * 2022-02-28 2022-05-13 歌尔股份有限公司 耳机降噪方法、装置、耳机设备及存储介质

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1453284A (fr) 1965-04-16 1966-06-03 Tokyo Shibaura Electric Co Appareil radio-fluoroscopique
WO2000021194A1 (en) * 1998-10-08 2000-04-13 Resound Corporation Dual-sensor voice transmission system
EP2533239B1 (de) 2009-04-28 2014-12-31 Bose Corporation Schaltung zur aktiven Geräuschunterdrückung mit Kontrolle zum Übersprechen
FR2974655B1 (fr) * 2011-04-26 2013-12-20 Parrot Combine audio micro/casque comprenant des moyens de debruitage d'un signal de parole proche, notamment pour un systeme de telephonie "mains libres".
FR2976111B1 (fr) * 2011-06-01 2013-07-05 Parrot Equipement audio comprenant des moyens de debruitage d'un signal de parole par filtrage a delai fractionnaire, notamment pour un systeme de telephonie "mains libres"
EP2769557B1 (de) * 2011-10-19 2017-06-28 Sonova AG Mikrofonanordnung
FR2983026A1 (fr) 2011-11-22 2013-05-24 Parrot Casque audio a controle actif de bruit de type non-adaptatif, pour l'ecoute d'une source musicale audio et/ou pour des fonctions de telephonie "mains-libres"

Also Published As

Publication number Publication date
JP2015219527A (ja) 2015-12-07
FR3021180A1 (fr) 2015-11-20
US20150332662A1 (en) 2015-11-19
US9466281B2 (en) 2016-10-11
FR3021180B1 (fr) 2016-06-03
CN105100990A (zh) 2015-11-25
EP2945399A1 (de) 2015-11-18

Similar Documents

Publication Publication Date Title
EP2945399B1 (de) Audiokopfhörer mit aktiver anc-geräuschkontrolle mit vorbeugung gegen sättigungseffekte eines feedback-mikrophonsignals
EP2930942A1 (de) Audiokopfhörer mit aktiver anc-geräuschkontrolle mit reduzierung des elektrischen rauschens
EP3171612A1 (de) Audio-headset mit aktiver geräuschkontrolle, anti-okklusionskontrolle und löschung der passiven schalldämpfung je nach vorliegen oder nicht-vorliegen einer stimmaktivität des headset-benutzers
EP2597889B1 (de) Kopfhörer mit nicht-adaptives aktiven geräuschkontrolle
US11710473B2 (en) Method and device for acute sound detection and reproduction
EP2518724B1 (de) Kombinierte Audioeinheit bestehend aus Mikrofon und Kopfhörer, die Mittel zur Geräuschdämpfung eines nahen Wortsignals umfasst, insbesondere für eine telefonische Freisprechanlage
EP3326171B1 (de) Vorrichtung zur aktiven geräuschdämpfung
US11557307B2 (en) User voice control system
WO2016069615A1 (en) Self-voice occlusion mitigation in headsets
EP3977443B1 (de) Mehrzweckmikrofon in akustischen geräten
WO2017207286A1 (fr) Combine audio micro/casque comprenant des moyens de detection d'activite vocale multiples a classifieur supervise
EP3326170B1 (de) Vorrichtung zur aktiven geräuschdämpfung
US20220124443A1 (en) Hearing device with multiple delay paths
FR3136308A1 (fr) Casque audio à réducteur de bruit
FR2921747A1 (fr) Procede de traitement d'un signal audio dans un dispositif portable

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20150506

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RIC1 Information provided on ipc code assigned before grant

Ipc: H04R 1/10 20060101AFI20160422BHEP

Ipc: G10K 11/175 20060101ALI20160422BHEP

Ipc: H04R 5/033 20060101ALI20160422BHEP

INTG Intention to grant announced

Effective date: 20160519

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: PARROT DRONES

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 837418

Country of ref document: AT

Kind code of ref document: T

Effective date: 20161015

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REG Reference to a national code

Ref country code: NL

Ref legal event code: FP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602015000462

Country of ref document: DE

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 837418

Country of ref document: AT

Kind code of ref document: T

Effective date: 20161012

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170112

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170113

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170213

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170212

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602015000462

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20170522

Year of fee payment: 3

Ref country code: FR

Payment date: 20170516

Year of fee payment: 3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170531

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170112

26N No opposition filed

Effective date: 20170713

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170506

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20170531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170506

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170531

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20180531

Year of fee payment: 4

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602015000462

Country of ref document: DE

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: NL

Ref legal event code: MM

Effective date: 20180601

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180531

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180601

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20181201

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20150506

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20190506

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190506

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190506

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161012