EP2671219A1 - Casque et écouteur - Google Patents

Casque et écouteur

Info

Publication number
EP2671219A1
EP2671219A1 EP12702497.4A EP12702497A EP2671219A1 EP 2671219 A1 EP2671219 A1 EP 2671219A1 EP 12702497 A EP12702497 A EP 12702497A EP 2671219 A1 EP2671219 A1 EP 2671219A1
Authority
EP
European Patent Office
Prior art keywords
microphone
noise compensation
active noise
converter
analog
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.)
Granted
Application number
EP12702497.4A
Other languages
German (de)
English (en)
Other versions
EP2671219B1 (fr
Inventor
Martin Streitenberger
Hatem Foudhaili
André GRANDT
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.)
Sennheiser Electronic GmbH and Co KG
Original Assignee
Sennheiser Electronic GmbH and Co KG
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 Sennheiser Electronic GmbH and Co KG filed Critical Sennheiser Electronic GmbH and Co KG
Publication of EP2671219A1 publication Critical patent/EP2671219A1/fr
Application granted granted Critical
Publication of EP2671219B1 publication Critical patent/EP2671219B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • G10K11/178—Methods 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
    • G10K11/1787—General system configurations
    • G10K11/17873—General system configurations using a reference signal without an error signal, e.g. pure feedforward
    • 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
    • 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
    • G10K11/178—Methods 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
    • G10K11/1781—Methods 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 characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
    • G10K11/17821—Methods 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 characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
    • G10K11/17823—Reference signals, e.g. ambient acoustic environment
    • 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
    • G10K11/178—Methods 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
    • G10K11/1781—Methods 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 characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
    • G10K11/17821—Methods 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 characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
    • G10K11/17825—Error signals
    • 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
    • G10K11/178—Methods 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
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G10K11/17853—Methods, e.g. algorithms; Devices of the filter
    • G10K11/17854—Methods, e.g. algorithms; Devices of the filter the filter being an adaptive filter
    • 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
    • G10K11/178—Methods 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
    • G10K11/1787—General system configurations
    • G10K11/17875—General system configurations using an error signal without a reference signal, e.g. pure feedback
    • 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
    • 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
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
    • G10K2210/1081—Earphones, e.g. for telephones, ear protectors or headsets
    • 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
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/301—Computational
    • G10K2210/3025—Determination of spectrum characteristics, e.g. FFT
    • 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
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/301—Computational
    • G10K2210/3039—Nonlinear, e.g. clipping, numerical truncation, thresholding or variable input and output gain
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/01—Hearing devices using active noise cancellation
    • 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

Definitions

  • a preferably analog pre-equalized audio signal of digital signal processing of a digital active noise compensation is supplied in order to increase a usable overall dynamics can.
  • the input audio signal is subjected to pre-emphasis processing (analog pre-equalization). Subsequently, an analog / digital conversion takes place.
  • a digital pre-emphasis may be made. Analog and digital pre-emphasis processing has the advantage of increasing the usable dynamics of digital-to-analog conversion and analog-to-digital conversion, and of minimizing any resulting artifacts in the audible range.
  • FIG. 1 shows a schematic block diagram of a receiver or headset according to a first exemplary embodiment
  • FIG. 4 shows a block diagram of a receiver or a headset according to a third exemplary embodiment.
  • the handset or the headset according to the third embodiment. Game can be based on a handset / headset according to the first or second embodiment.
  • the handset or the headset has a microphone 12, an AD converter 30, an active noise compensation filter 40, a DA converter 50 and an electroacoustic reproduction converter 70 and a secondary link 100.
  • the active noise compensation according to the third exemplary embodiment preferably takes place according to the feed forward principle.
  • An audio signal is detected by the microphone 12 and output as an output signal x (t).
  • This output signal x (t) is subjected to AD conversion in the AD converter 30, and a digital output signal x d (n) is output to the filter 40.
  • the output signal of the filter y d (n) is output to the DA converter 50, which in turn outputs an analog output signal y (t).
  • This analog output signal y (t) is supplied to the electroacoustic reproduction converter 70.
  • the transmission path from the loudspeaker 70 and the acoustic path represents the so-called secondary path 100.
  • the output signal y (t) of the DA converter 50 is supplied to the loudspeaker 70, which in turn outputs a counter sound u (t) which transmits the interference sound d (FIG. t) superimposed to compensate for this.
  • the result of this compensation is the superposition signal e (t).
  • the maximum possible level S max x (f) is determined by the external microphone 12 or the internal microphone 12. Alternatively, the maximum level can also be estimated.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Headphones And Earphones (AREA)
EP12702497.4A 2011-02-01 2012-02-01 Casque et écouteur Active EP2671219B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011003470A DE102011003470A1 (de) 2011-02-01 2011-02-01 Headset und Hörer
PCT/EP2012/051622 WO2012104329A1 (fr) 2011-02-01 2012-02-01 Casque et écouteur

Publications (2)

Publication Number Publication Date
EP2671219A1 true EP2671219A1 (fr) 2013-12-11
EP2671219B1 EP2671219B1 (fr) 2015-03-25

Family

ID=45563013

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12702497.4A Active EP2671219B1 (fr) 2011-02-01 2012-02-01 Casque et écouteur

Country Status (4)

Country Link
US (1) US9373317B2 (fr)
EP (1) EP2671219B1 (fr)
DE (1) DE102011003470A1 (fr)
WO (1) WO2012104329A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016089745A1 (fr) * 2014-12-05 2016-06-09 Knowles Electronics, Llc Appareil et procédé de traitement de signal numérique avec des microphones
US9401158B1 (en) 2015-09-14 2016-07-26 Knowles Electronics, Llc Microphone signal fusion
US9830930B2 (en) 2015-12-30 2017-11-28 Knowles Electronics, Llc Voice-enhanced awareness mode
US9779716B2 (en) 2015-12-30 2017-10-03 Knowles Electronics, Llc Occlusion reduction and active noise reduction based on seal quality
US9812149B2 (en) 2016-01-28 2017-11-07 Knowles Electronics, Llc Methods and systems for providing consistency in noise reduction during speech and non-speech periods

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4985925A (en) * 1988-06-24 1991-01-15 Sensor Electronics, Inc. Active noise reduction system
US5278911A (en) * 1989-05-18 1994-01-11 Smiths Industries Public Limited Company Speech recognition using a neural net
DK0643881T3 (da) * 1992-06-05 1999-08-23 Noise Cancellation Tech Aktiv og selektiv hovedtelefon
FR2704348B1 (fr) * 1993-04-23 1995-07-07 Matra Communication Procede de reconnaissance de parole a apprentissage.
CA2198844C (fr) * 1994-08-30 2007-08-07 Knud Erik Baekgaard Stethoscope electronique
US7006638B1 (en) * 1994-08-30 2006-02-28 Bang & Olufsen Technology A/S Electronic stethoscope
JP3325770B2 (ja) * 1996-04-26 2002-09-17 三菱電機株式会社 ノイズ低減回路及びノイズ低減装置及びノイズ低減方法
US6807280B1 (en) * 1998-01-26 2004-10-19 Delphi Technologies, Inc. Audio signal processing circuit for reducing noise in an audio signal
US20110002474A1 (en) * 2009-01-29 2011-01-06 Graeme Colin Fuller Active Noise Reduction System Control
CN102422346B (zh) * 2009-05-11 2014-09-10 皇家飞利浦电子股份有限公司 音频噪声消除
CN102947685B (zh) * 2010-06-17 2014-09-17 杜比实验室特许公司 用于减少环境噪声对收听者的影响的方法和装置
US20120155667A1 (en) * 2010-12-16 2012-06-21 Nair Vijayakumaran V Adaptive noise cancellation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012104329A1 *

Also Published As

Publication number Publication date
EP2671219B1 (fr) 2015-03-25
WO2012104329A1 (fr) 2012-08-09
US9373317B2 (en) 2016-06-21
US20130322642A1 (en) 2013-12-05
DE102011003470A1 (de) 2012-08-02

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