EP3644620A1 - Écouteurs intra-auriculaires anc - Google Patents

Écouteurs intra-auriculaires anc Download PDF

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Publication number
EP3644620A1
EP3644620A1 EP18193193.2A EP18193193A EP3644620A1 EP 3644620 A1 EP3644620 A1 EP 3644620A1 EP 18193193 A EP18193193 A EP 18193193A EP 3644620 A1 EP3644620 A1 EP 3644620A1
Authority
EP
European Patent Office
Prior art keywords
volume
ear
anc
loudspeaker
earphone
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.)
Withdrawn
Application number
EP18193193.2A
Other languages
German (de)
English (en)
Other versions
EP3644620A8 (fr
Inventor
Michael Perkmann
Daniel Wöhrer
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.)
Austrian Audio GmbH
Original Assignee
Austrian Audio GmbH
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 Austrian Audio GmbH filed Critical Austrian Audio GmbH
Priority to EP18193193.2A priority Critical patent/EP3644620A1/fr
Priority to ATA50518/2019A priority patent/AT521588A2/de
Priority to US16/535,486 priority patent/US11115749B2/en
Priority to EP19195322.3A priority patent/EP3624112B1/fr
Priority to MA051343A priority patent/MA51343A/fr
Publication of EP3644620A1 publication Critical patent/EP3644620A1/fr
Publication of EP3644620A8 publication Critical patent/EP3644620A8/fr
Withdrawn legal-status Critical Current

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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
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G10K11/17857—Geometric disposition, e.g. placement of microphones
    • 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
    • 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
    • G10K11/17879—General system configurations using both a reference signal and an error signal
    • G10K11/17881—General system configurations using both a reference signal and an error signal the reference signal being an acoustic signal, e.g. recorded with a microphone
    • 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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2811—Enclosures comprising vibrating or resonating arrangements for loudspeaker transducers
    • 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
    • G10K2210/3016—Control strategies, e.g. energy minimization or intensity measurements
    • 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
    • G10K2210/3026—Feedback
    • 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
    • G10K2210/321—Physical
    • G10K2210/3219—Geometry of the configuration
    • 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
    • G10K2210/321—Physical
    • G10K2210/3224—Passive absorbers
    • 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

Definitions

  • the invention relates to an in-ear ANC earphone that is worn at least partially in the external auditory canal, according to the preamble of claim 1
  • in-ear ANC earphones have to be designed for different cases, in particular: If the earphone leaks from the ear canal when wearing it, causing a leak, the result is a bass drop to the limit frequency of the leak opening.
  • the different geometries of the ear canals and thus the different coupled ear volumes lead to different loads on the transducer, as a result of which the limit frequency of the pressure chamber changes.
  • the earphone is removed from the ear when it is still in use and is therefore operated in the open sound field. Since it is not designed for such operation, but is designed for operation with a closed volume, the secondary line frequency response (corresponds to the transfer function between loudspeaker and microphone) is characterized by a strong bass drop. Only for higher frequencies, at which the earphone pronunciation begins to have an inductive effect, does the situation again approach that of the secondary section in the closed volume.
  • the acoustic channel of the loudspeaker possibly also this one, and an acoustic connecting channel (tube) are present side by side in the plug part to be inserted into the ear, the side of the loudspeaker facing away from the ear is connected to the surroundings by means of a connecting opening; the acoustic connecting channel does not lead to the outside, but to an additional volume which is arranged at a distance from the pronunciation, preferably in the vicinity of the loudspeaker and possibly around it.
  • the additional channel is to be routed next to one another as soundproof as possible, both in the earphone and in the plug part.
  • the task of the plug part is to connect both channels to the earphone in as sealed a manner as possible.
  • the measures according to the invention de facto lead to a linearization of the secondary path with regard to the wearing situation; Furthermore, the measures according to the invention with the second channel, the connecting channel, the acoustic friction which can be provided therein and the additional volume have created a stabilization for high frequencies above approximately 1 kHz, since frequency components above one kHz generally impair the stability in the secondary path, which is caused by the acoustic low-pass effect is suppressed.
  • the second tube can be designed in such a way that the feedback circuit is interrupted in the event of such blocking, so that instability does not occur even in this extreme case.
  • the Fig. 1 represents, in purely schematic form, an in-ear earphone according to the invention, often referred to below simply as earphone.
  • a tube 7 connects the pre-volume 2 in the tip area 6 together with the loudspeaker channel 10 with an additional volume 3, which occupies a noticeable to large part of the listener.
  • a horizontal orientation of the tube is assumed as the intended orientation Fig. 1 Part shown in dashed lines on the outside points downwards.
  • the ear volume of the user is not shown, corresponding to the coupling volume 12 Fig. 2 and 4th ).
  • the tube 7 is as soundproof as possible from the speaker channel.
  • the microphone 11 of the ANC circuit is usually arranged in the area of the ear tip 5 in a tip area 6 or in the standard pre-volume 2. In one embodiment of the invention, this microphone 11 is now arranged in the additional volume 3 in the inner region 8, which leads to surprisingly favorable results.
  • the Fig. 3 shows the situation of the Fig. 2 with the difference that here the microphone 11 is positioned schematically in the additional volume 3 at an inner position 8.
  • the description of the lines is the same as that of the Fig. 2 .
  • the Fig. 4 represents the equivalent circuit diagram, the drawn reference numerals correspond to those of Fig. 1 .
  • the Fig. 5 finally shows the frequency response for the following situations:
  • This representation shows the secondary path differences between setup with / without connection of the microphone 11 to the inner position 8 through the tube 7.
  • the solid line shows the secondary path WITHOUT channel / tube for the position inner area 8 of the microphone 11, but a direct connection to the side volume in which the ANC microphone 11 sits, for the blocked case (earphone is blocked by its pronunciation).
  • the dashed line shows the secondary distance in the wearing situation in the ear for this situation (WITHOUT channel / tube).
  • the dash-dotted line shows the secondary path WITHOUT channel / tube for the position inner area 8 of the microphone 11, but the direct connection to the side volume in which the ANC microphone 11 is located.
  • the listener plays "open", i.e. is not worn and also not blocked.
  • the dotted line shows the situation analogous to the dash-dotted line, but with the significant difference that the coupling according to the invention of the microphone 11 seated in the additional volume 3 (position inner region 8) is implemented using the tube 7.
  • the position of the microphone shifts virtually to the end of the tube 7 on the ear side (depending on the design, generally corresponds to the tip area 6), of course with an upstream acoustic low-pass filter which is of a mechano-acoustic nature.
  • This virtual position in tip area 6 has the great advantage that additional level spacing is generated for the ANC system in the open case.
  • the additional level difference is e.g. 16dB in the range 300-2000Hz.
  • the loudspeaker is provided in an outer part of the earpiece, the progressive miniaturization already allows it to be brought into the area of the outer auditory canal. Also in this case, the features according to the invention are to be used advantageously, and with knowledge of the invention the person skilled in the art can easily do this.
  • Pre-volume 2 is the volume in front of him in the sound propagation of the loudspeaker (standard pre-volume 2 and speaker channel 10), with the respective ear volume of the user (coupling volume 12) and, depending on the design of the listener, with or without additional volume 3 and the tube 7 for coupling the additional volume 3.
  • Tip area 6 is, quite generally, the area at the ear-side end of the earpiece (earphone housing including ear tip 5), which also includes 25% of the distance from the physical end (pronunciation) of the earpiece to the membrane of the loudspeaker 1.
  • the position of the inner region 8 is in the Fig. 1 only indicated in principle, it can be anywhere in the additional volume 3, which begins at the end of the tube 7 remote from the tip.
  • "In the interior” or “in the additional volume” means, of course, a wall of or a wall in the additional volume in or on which the microphone 11 is attached.
  • the additional volume 3 provided according to the invention can occupy any region of the receiver without any particular restriction, insofar as the components accommodated therein permit this; it can also extend around the vent 4.
  • the tube 7 provided according to the invention is sufficient, as in Fig. 1 indicated, from the ear-side end of the handset, for the reasons mentioned above, depending on the design, also at a short distance of a few millimeters from it, up to the additional volume. It can have a cross-sectional shape adapted to the interior of the receiver, which need not be constant in shape or in area over its length.
  • the desired acoustic insulation with respect to the directly adjacent pre-volume 2, speaker channel 10 and to the loudspeaker 1 is achieved, for example, by airtight and, in the best case, sound-hard separation by suitable material thicknesses and high material densities.
  • the ear tip 5 itself can also consist of two separate channel guides, which have the two-channel structure (tube 7 and loudspeaker channel 10) of the earphone under the aforementioned conditions Receives part of the housing and continues / extended to the tip area 6.
  • the tube 7 therefore does not only consist of a continuous part, but is structured by two or more segments, in this special case earphone housing and sound guides (tubes or channels) in or as part of the ear tip 5.
  • the loudspeaker ventilation 4 is also generally acoustically isolated from the additional volume 3 and, in addition, in most cases has an acoustic friction inside, which the person skilled in the art can easily determine with knowledge of the invention and the design of the receiver.
  • a possible embodiment in which a high-inductive, i.e. only effective for very low-frequency signals ( ⁇ 20 Hz) connection between loudspeaker ventilation 4 and additional volume 3 is made is useful in some cases to ensure isobaric pressure compensation between the pre-volume and the outside area.
  • the electronics for the operation of the loudspeaker and the microphone are as in the prior art and, like the power supply and the wiring, require no explanation, and the same applies to the materials that can be used.
  • the terms "front”, “rear”, “top”, “bottom” and so on are used in the common form and with reference to the object in its usual position of use. This means that with a weapon the muzzle of the barrel is “in front”, that the bolt or slide is moved “backwards” by the explosion gases, etc.
  • the direction of the barrel refers to the hanger and not the the running rail (s) goes in this direction on the hanger, transverse to it essentially means a direction rotated 90 ° to it and essentially horizontal.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Headphones And Earphones (AREA)
EP18193193.2A 2018-09-07 2018-09-07 Écouteurs intra-auriculaires anc Withdrawn EP3644620A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP18193193.2A EP3644620A1 (fr) 2018-09-07 2018-09-07 Écouteurs intra-auriculaires anc
ATA50518/2019A AT521588A2 (de) 2018-09-07 2019-06-07 In-Ear-ANC-Ohrhörer
US16/535,486 US11115749B2 (en) 2018-09-07 2019-08-08 In-ear active noise-cancelling earphone
EP19195322.3A EP3624112B1 (fr) 2018-09-07 2019-09-04 Écouteurs intra-auriculaires anc
MA051343A MA51343A (fr) 2018-09-07 2019-09-04 Écouteurs intra-auriculaires anc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18193193.2A EP3644620A1 (fr) 2018-09-07 2018-09-07 Écouteurs intra-auriculaires anc

Publications (2)

Publication Number Publication Date
EP3644620A1 true EP3644620A1 (fr) 2020-04-29
EP3644620A8 EP3644620A8 (fr) 2021-03-10

Family

ID=63556145

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18193193.2A Withdrawn EP3644620A1 (fr) 2018-09-07 2018-09-07 Écouteurs intra-auriculaires anc

Country Status (3)

Country Link
EP (1) EP3644620A1 (fr)
AT (1) AT521588A2 (fr)
MA (1) MA51343A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2584535B (en) * 2019-04-02 2021-12-01 Tymphany Acoustic Tech Huizhou Co Ltd In-ear headphone device with active noise control

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1398991A2 (fr) 1997-04-17 2004-03-17 Bose Corporation Réduction du bruit acoustique
US20090080670A1 (en) * 2007-09-24 2009-03-26 Sound Innovations Inc. In-Ear Digital Electronic Noise Cancelling and Communication Device
US7995782B2 (en) 2007-01-29 2011-08-09 Siemens Hearing Instruments, Inc. Combined receiver and ear-canal microphone assembly for a hearing instrument
EP2768239A1 (fr) * 2013-02-13 2014-08-20 Funai Electric Co., Ltd. Ecouteur microphone
US20140294182A1 (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
EP2856771A1 (fr) 2012-05-25 2015-04-08 Bose Corporation Écouteur à réduction de bruit active dans l'oreille
GB2526945A (en) * 2014-06-06 2015-12-09 Cirrus Logic Inc Noise cancellation microphones with shared back volume

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1398991A2 (fr) 1997-04-17 2004-03-17 Bose Corporation Réduction du bruit acoustique
US7995782B2 (en) 2007-01-29 2011-08-09 Siemens Hearing Instruments, Inc. Combined receiver and ear-canal microphone assembly for a hearing instrument
US20090080670A1 (en) * 2007-09-24 2009-03-26 Sound Innovations Inc. In-Ear Digital Electronic Noise Cancelling and Communication Device
EP2856771A1 (fr) 2012-05-25 2015-04-08 Bose Corporation Écouteur à réduction de bruit active dans l'oreille
US9082388B2 (en) 2012-05-25 2015-07-14 Bose Corporation In-ear active noise reduction earphone
EP2768239A1 (fr) * 2013-02-13 2014-08-20 Funai Electric Co., Ltd. Ecouteur microphone
US20140294182A1 (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
GB2526945A (en) * 2014-06-06 2015-12-09 Cirrus Logic Inc Noise cancellation microphones with shared back volume

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2584535B (en) * 2019-04-02 2021-12-01 Tymphany Acoustic Tech Huizhou Co Ltd In-ear headphone device with active noise control

Also Published As

Publication number Publication date
AT521588A2 (de) 2020-03-15
MA51343A (fr) 2020-10-28
EP3644620A8 (fr) 2021-03-10

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