EP0737022A2 - Dispositif de réduction du bruit - Google Patents

Dispositif de réduction du bruit Download PDF

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Publication number
EP0737022A2
EP0737022A2 EP96104496A EP96104496A EP0737022A2 EP 0737022 A2 EP0737022 A2 EP 0737022A2 EP 96104496 A EP96104496 A EP 96104496A EP 96104496 A EP96104496 A EP 96104496A EP 0737022 A2 EP0737022 A2 EP 0737022A2
Authority
EP
European Patent Office
Prior art keywords
microphone
headphones
noise
ear
compensating element
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
EP96104496A
Other languages
German (de)
English (en)
Other versions
EP0737022B1 (fr
EP0737022A3 (fr
Inventor
Wolfgang Zum Berge
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 EP0737022A2 publication Critical patent/EP0737022A2/fr
Publication of EP0737022A3 publication Critical patent/EP0737022A3/fr
Application granted granted Critical
Publication of EP0737022B1 publication Critical patent/EP0737022B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones

Definitions

  • the invention relates to a device for reducing noise at the human ear, with a microphone picking up the noise and a reproduction transducer, to which a signal for noise compensation is fed via a compensation circuit connected to the microphone.
  • Such a device is known from DE-42 00 811-C2.
  • the known device has headphones with acoustically closed ear-enclosing shells.
  • the microphone for recording the noise is arranged in front of the playback transducer offset from the main central axis of the playback transducer.
  • the disturbing sound picked up by the microphone is first fed to an amplifier, then filtered and then again fed to the reproduction transducer, which excites a disturbing sound signal which is in phase opposition to the disturbing sound.
  • the known device does not always work satisfactorily under certain conditions.
  • the circumferential shape of the headphones thus results in poor ventilation of the ear, as a result of which the formation of sweat in the area covered by the headphones is supported, especially since the headphones lie on with relatively high pressure. This leads to the fact that the known device is reluctantly worn for comfort reasons and its use is uncomfortable.
  • each human ear and in particular the area of the auricle, like the human fingerprint, is individually shaped. This results in different conditions of sound reflection and different sound volumes for each human ear.
  • the result of this is that a compensation control circuit which has been tuned once and which is matched to average ear reflection behavior and sound volume often works in a suboptimal state when used.
  • the object is achieved with a device for reducing noise in the human ear, which has a microphone which picks up the noise and a playback transducer which is supplied with signals compensating for the noise via a compensation circuit connected to the microphone and in which the microphone has a compensating element, which is arranged in front of the sound inlet opening of the microphone.
  • Such a compensation element compensates for the individually different auricle reflections, thus defining a quasi-constant sound reflection and thereby reducing the individual reflection effects in the compensation circuit and improving the use of the entire device and increasing the effectiveness of the overall noise compensation.
  • the circuit gain of the compensation circuit increases less than in the case of a device without a reflector and The stability of the control loop is ensured even when the headphones are pressed down.
  • the microphone and the compensation transducer are also aligned with the ear and preferably centered on an axis of symmetry, e.g. the axis of rotational symmetry, as shown in FIG. 1.
  • the compensating element is formed by a circular plate which has projections directed towards the transducer for receiving the microphone. This allows the microphone to be fixed with respect to the compensating element.
  • the headphones are not fitted around the ear, but rather on the ear, so that a smaller size and a considerably lower weight of the headphones result and despite less pressure on the headphones than in the known one Device that noise reduction is sufficiently good compared to the known device and is even improved.
  • the wearing comfort of headphones / hearing protection designed in this way is greatly improved compared to the known device, especially since the weight of the headphones can be reduced by approximately 50% compared to the known headphones.
  • Fig. 1 shows part of an on-ear headphone 1 with an acoustically closed ear pad 2 and shell 3.
  • the noise 4 coming to the ear is picked up by a microphone 5, which transmits the recording signal to a compensation circuit 6, which in turn transmits a signal to one for noise compensation Playback converter 7 outputs, which excites the noise-compensating signal.
  • the microphone 5 has a sound inlet opening 8, which is covered by a compensating element 9. Both the playback transducer 7 and the microphone 5 are aligned in the direction of the human ear 10, so that the compensating element 9, the microphone 5 and the playback transducer 7 have a common axis of symmetry, which is preferably the axis of rotation.
  • the compensating element 9, as shown in FIGS. 1b and 1c, consists of a plate 10 which has projections 11 directed towards the playback transducer.
  • the distance between the plate 10 of the compensating element and the sound inlet opening of the microphone is approximately 1 to 3 mm.
  • the plate 10 is circular and has a diameter of about 0.5 to 3 cm, preferably about 1.5 cm and is made of plastic.
  • the microphone is received by a sleeve with a circumferential bead and the sleeve fits with its front part in the area between the projections 11 of the compensating element 9 until the circumferential bead rests on the projections. The position of the microphone with respect to the compensating element 9 is thus completely defined.
  • the compensating element Through the compensating element, reflections from the human auricle, which are different for each person due to the individually designed human auricle shape, reach the microphone in a defined size by converting them into a corresponding electrical signal. Due to the sound reflection defined by the compensating element, the loop gain of the compensation circuit shown in FIG. 3 increases less than without the reflector when the pressure is increased. By means of the compensating element, the stability of the control loop of the compensation circuit is ensured even when the headphones are pressed on.
  • the same components as in Fig. 1 are designated by the same reference number.
  • the microphone 5 is arranged in the known device offset by 90 ° to the main axis of the playback converter in front of the playback converter.
  • the sound inlet opening is not covered in the microphone shown in FIG. 2.
  • the headphone shown in FIG. 2 is a headphone that surrounds the ear, whose contact pressure must be about 10 Newtons and thus about 3 times that of the headphones according to the invention shown in FIG. 1.
  • the headphone shown in FIG. 2 is about twice as heavy as the headphone shown in FIG. 1, which weighs about 180 g.
  • the compensation circuit for the device according to the invention has the structure shown in FIG. 3, which is essentially known from DE-4200811.
  • the output signal 17 generated by the microphone 5 is preamplified by a first amplifier 14, evaluated in a filter 16 and amplified in a further amplifier 18 in such a way that excitation of the reproduction transducer 7 in opposite phase results.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Headphones And Earphones (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
EP96104496A 1995-04-07 1996-03-21 Dispositif de réduction du bruit Expired - Lifetime EP0737022B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19513111 1995-04-07
DE19513111A DE19513111A1 (de) 1995-04-07 1995-04-07 Einrichtung zur Verminderung von Störschall

Publications (3)

Publication Number Publication Date
EP0737022A2 true EP0737022A2 (fr) 1996-10-09
EP0737022A3 EP0737022A3 (fr) 1997-07-30
EP0737022B1 EP0737022B1 (fr) 2000-05-31

Family

ID=7759081

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96104496A Expired - Lifetime EP0737022B1 (fr) 1995-04-07 1996-03-21 Dispositif de réduction du bruit

Country Status (3)

Country Link
US (1) US6122383A (fr)
EP (1) EP0737022B1 (fr)
DE (2) DE19513111A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005052548A1 (de) * 2005-11-02 2007-05-03 Sennheiser Electronic Gmbh & Co. Kg Wandlersystem für eine aktive Lärmkompensationsvorrichtung
EP2161717A1 (fr) 2008-09-08 2010-03-10 Deutsche Thomson OHG Procédé d'atténuation ou suppression d'un signal de bruit pour un auditeur portant un type spécifique de casque ou d'oreillette, casque ou oreillette correspondants et système de haut-parleur correspondant
US8391530B2 (en) 2009-01-16 2013-03-05 Sennheiser Electronic Gmbh & Co. Kg Helmet and apparatus for active noise suppression

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1201101A2 (fr) * 1999-12-24 2002-05-02 Koninklijke Philips Electronics N.V. Casque avec microphones integres
US6741718B1 (en) * 2000-08-28 2004-05-25 Gn Jabra Corporation Near-field speaker/microphone acoustic/seismic dampening communication device
DE10112305B4 (de) * 2001-03-14 2004-01-08 Siemens Ag Gehörschutz und Verfahren zum Betrieb einer geräuschemittierenden Einrichtung
DE10117705C2 (de) * 2001-04-09 2003-02-27 Hoergeraete Kind Gmbh U Co Kg Kaskadiertes Kapsel-Gehörschutzsystem
WO2003030145A1 (fr) * 2001-10-03 2003-04-10 Koninklijke Philips Electronics N.V. Procede de reproduction de signaux sonores et systeme de reproduction sonore
US6639987B2 (en) * 2001-12-11 2003-10-28 Motorola, Inc. Communication device with active equalization and method therefor
US20040086141A1 (en) * 2002-08-26 2004-05-06 Robinson Arthur E. Wearable buddy audio system
DE102007001980A1 (de) * 2007-01-08 2008-07-10 Sennheiser Electronic Gmbh & Co. Kg Kopfhörer
DE202007018429U1 (de) 2007-01-08 2008-06-26 Sennheiser Electronic Gmbh & Co. Kg Kopfhörer
US9558732B2 (en) * 2007-08-15 2017-01-31 Iowa State University Research Foundation, Inc. Active noise control system
DE102008030007B4 (de) * 2008-06-24 2012-01-19 Zöllner GmbH Kopfhörer und Rottenwarngerät mit einem Kopfhörer
SG11201407474VA (en) * 2012-07-13 2014-12-30 Razer Asia Pacific Pte Ltd An audio signal output device and method of processing an audio signal
US11601744B2 (en) * 2020-06-23 2023-03-07 Synaptics Incorporated Headphone alignment systems and methods

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4494074A (en) * 1982-04-28 1985-01-15 Bose Corporation Feedback control
EP0412902A2 (fr) * 1989-08-10 1991-02-13 Mnc, Inc. Dispositif électro-acoustique pour des moyens auditifs avec suppression du bruit
US5182774A (en) * 1990-07-20 1993-01-26 Telex Communications, Inc. Noise cancellation headset
EP0590869A1 (fr) * 1992-09-30 1994-04-06 AT&T Corp. Combiné téléphonique avec suppression de bruit
US5375174A (en) * 1993-07-28 1994-12-20 Noise Cancellation Technologies, Inc. Remote siren headset

Family Cites Families (12)

* 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
US4887693A (en) * 1987-06-24 1989-12-19 Shure Brothers, Inc. Wind and breath noise protector for microphones
US4922542A (en) * 1987-12-28 1990-05-01 Roman Sapiejewski Headphone comfort
US5138664A (en) * 1989-03-25 1992-08-11 Sony Corporation Noise reducing device
US4975966A (en) * 1989-08-24 1990-12-04 Bose Corporation Reducing microphone puff noise
US5349140A (en) * 1992-08-07 1994-09-20 Valenzin Lawrence R Microphone windscreen
US5381485A (en) * 1992-08-29 1995-01-10 Adaptive Control Limited Active sound control systems and sound reproduction systems
US5410608A (en) * 1992-09-29 1995-04-25 Unex Corporation Microphone
US5365595A (en) * 1993-02-19 1994-11-15 Motorola, Inc. Sealed microphone assembly
US5329593A (en) * 1993-05-10 1994-07-12 Lazzeroni John J Noise cancelling microphone
US5452361A (en) * 1993-06-22 1995-09-19 Noise Cancellation Technologies, Inc. Reduced VLF overload susceptibility active noise cancellation headset
US5673330A (en) * 1995-11-08 1997-09-30 Chang; Ching-Lu Microphone transducer with noise reducing member

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4494074A (en) * 1982-04-28 1985-01-15 Bose Corporation Feedback control
EP0412902A2 (fr) * 1989-08-10 1991-02-13 Mnc, Inc. Dispositif électro-acoustique pour des moyens auditifs avec suppression du bruit
US5182774A (en) * 1990-07-20 1993-01-26 Telex Communications, Inc. Noise cancellation headset
EP0590869A1 (fr) * 1992-09-30 1994-04-06 AT&T Corp. Combiné téléphonique avec suppression de bruit
US5375174A (en) * 1993-07-28 1994-12-20 Noise Cancellation Technologies, Inc. Remote siren headset

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005052548A1 (de) * 2005-11-02 2007-05-03 Sennheiser Electronic Gmbh & Co. Kg Wandlersystem für eine aktive Lärmkompensationsvorrichtung
US8180092B2 (en) 2005-11-02 2012-05-15 Sennheiser Electronic Gmbh & Co. Kg Converter system for an active noise compensation apparatus
EP2161717A1 (fr) 2008-09-08 2010-03-10 Deutsche Thomson OHG Procédé d'atténuation ou suppression d'un signal de bruit pour un auditeur portant un type spécifique de casque ou d'oreillette, casque ou oreillette correspondants et système de haut-parleur correspondant
US8391530B2 (en) 2009-01-16 2013-03-05 Sennheiser Electronic Gmbh & Co. Kg Helmet and apparatus for active noise suppression

Also Published As

Publication number Publication date
US6122383A (en) 2000-09-19
EP0737022B1 (fr) 2000-05-31
DE59605337D1 (de) 2000-07-06
DE19513111A1 (de) 1996-10-10
EP0737022A3 (fr) 1997-07-30

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