EP1077012B1 - Casque pour passagers d'avions - Google Patents

Casque pour passagers d'avions Download PDF

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Publication number
EP1077012B1
EP1077012B1 EP99907760A EP99907760A EP1077012B1 EP 1077012 B1 EP1077012 B1 EP 1077012B1 EP 99907760 A EP99907760 A EP 99907760A EP 99907760 A EP99907760 A EP 99907760A EP 1077012 B1 EP1077012 B1 EP 1077012B1
Authority
EP
European Patent Office
Prior art keywords
headset
assembly according
headset assembly
drive unit
anr
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.)
Expired - Lifetime
Application number
EP99907760A
Other languages
German (de)
English (en)
Other versions
EP1077012A1 (fr
Inventor
Owen Jones
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.)
NCT Group Inc
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NCT Group Inc
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Filing date
Publication date
Application filed by NCT Group Inc filed Critical NCT Group Inc
Publication of EP1077012A1 publication Critical patent/EP1077012A1/fr
Application granted granted Critical
Publication of EP1077012B1 publication Critical patent/EP1077012B1/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
    • 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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1058—Manufacture or assembly
    • 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

  • This invention relates to headset more especially but not exclusively intended for use by aircraft passengers.
  • the headsets used in aircraft for the in-flight entertainment generally have a short lifetime due to the abuse they receive in handling and cleaning and this means that airlines require the headsets to be low cost in order to keep replacement costs down. This unfortunately means that the performance of the headsets is often relatively poor and this exacerbates the problems of poor intelligibility of the entertainment programmes due to the high levels of background noise present on aircraft.
  • the reasons for the high cost of an active headset are twofold. The first is that a high quality microphone has to be closely associated with each earphone and the cost of this microphone and associated wiring adds appreciably to the costs. The second reason is that electronics have to be added to the system in order to implement the noise cancellation process. It is possible to separate the electronics from the headset (for example as described in patent publication No. PCT/US94/0727), but this means that the seat processor unit (PCU) has to be modified and requires an aircraft re-fit. This is an expensive option. If, however, the electronics are housed within the headset then the headset cost tends to become prohibitive.
  • PCU seat processor unit
  • the purpose of this invention is to describe means whereby these compromises can be avoided, more especially by implementing a modular ANR headset that can be readily altered from normal to active modes by choice of module and in which only the very low cost parts of the headset assembly need be regularly replaced.
  • a headset assembly having active noise reduction (ANR) for environmental noise comprising for each ear a first part including an earphone shell carried by the headband and a second part including at least a circuit board bearing the ANR electronics, the second part being mechanically and electrically separable from the first part, electrical connection and separation being enabled by means of a plug and a socket on the respective parts, which when assembled will include in operative relationship a baffle plate, drive unit and sensing microphone.
  • ANR active noise reduction
  • This construction of headset assembly enables, in particular, its configuration either as a conventional headset or an active headset, and its ready conversion from one to the other.
  • the first part comprises an earphone shell and the second part comprises, in addition to the ANR electronics, a baffle plate and a drive unit and sensing microphone carried by the baffle plate.
  • the first part is adapted to receive an alternative second part comprising a baffle plate and a drive unit for providing conversion to a non-active headset.
  • the second part comprises a baffle plate and the first part includes an earphone shell, and at least a sensing microphone and ANR electronics carried by the shell.
  • the first part also includes the drive unit.
  • the second part comprises the ANR electronics, and may also include a cover part for completing the earphone shell.
  • the baffle plate has an opening in front of the drive unit and a vented space is enclosed on the rear side of the drive unit remote from the baffle plate opening, the size of the vent being adjustable.
  • the module 101 consists of a baffle assembly 102 which holds the sensing microphone 103, earphone drive unit 104, acoustic treatment 105, electronics module 106 and socket 107.
  • This module snaps into place into the headset assembly 108, electrical connection therefor being made between socket 107 and plug 109. All elements of the headphone assembly 108 can be low cost since they are not required to last very long. This is a principal reason for putting the plug in the headset assembly, as it can be made to a lower cost than a socket.
  • the socket 107, plug 109 and cable 110 bring the audio signal and power up from an interface in the aircraft seat.
  • the cancellation module 101 is self contained and can be set up for optimum performance in production.
  • the acoustics will not be significantly altered from the designed-for characteristics when inserted into different headphone assemblies 108 by untrained staff,
  • the headset assembly 108 can be of different styles provided in all cases it has been designed not to interfere with the acoustics of the module.
  • the headset can be converted into a standard non-active version by plugging in module 111, shown in Figure 2.
  • This contains only an earphone and socket 107 and so is still very low cost.
  • the number of connections on the socket can be reduced to two and be of a low quality as it will not be required to last very long.
  • the active module 121 is inserted into the headset assembly 128 in a different way.
  • the baffle plate 122 is part of the headphone assembly 128 and the active module 121 is slid in from the top. This option means that virtually all external surfaces of the headphone are replaced when the headset is changed and so there is not build up of scuff marks to detract from the appearance of the headset.
  • the illustrated components of the module are the earphone shell carrying the ANR electronics 126 and socket 127, as well as the sensing microphone 123.
  • the baffle plate 122 carries the drive unit 124 and plug 129.
  • a modification shown in Figure 4 and using the same reference numerals as Figure 3 with the suffix A makes it possible also to replace the drive unit each time the rest of the headset assembly is replaced. This requirement may arise if, for example, the cleaning process is one that might subject the drive unit to potential damage. In this situation the drive unit can be a part of the earphone shell module, with the baffle plate 122A carrying only the plug 129A. The active module can be plugged or slotted into the headset in either of the ways shown in Figures 1 and 2 or Figure 3.
  • the drive unit is either selected to the desired tolerance, or else the sensitivity adjusted on the production line by means, for example, of a variable resistor in series with the drive unit.
  • variable resistor can be mounted on the same PCB that is commonly used to terminate the drive unit voice coil wires.
  • a third embodiment shown in Figure 5 makes it possible to replace the microphone regularly.
  • the ANR electronics 142 are incorporated into the plug-in module.
  • the microphone requires a sensitivity adjustment pot but the drive unit pot may be dispensed with, or vice versa, one adjustment being adequate for the two transducers.
  • the ANR electronics 142 can slot in as shown in Figure 5, together with a cover plate 141 which completes the earpiece shell, or else it can be completely inserted into the headset behind an integral cover 143, as shown in Figure 6.
  • the headset assembly can also be configured as a conventional passive headset by omitting the electronics.
  • a fourth embodiment shown in Figure 7 and using the same reference numerals as Figure 1 with the suffix A allows the acoustic properties of the replaceable module to be tuned to match the characteristics of different earpads, eg leatherette or foam.
  • the module 101A still fits into headset assembly 108A, but in this embodiment the module diameter is smaller than the rear shell 113A.
  • the module 101A incorporates a rear housing that encloses the rear of the drive unit 104A in baffle 102A, apart from a vent formed by aperture 114A and shutter 115A.
  • the aperture 114A may comprise a series of small holes or a number of slots.
  • the shutter is arranged such that it can partially or completely cover the aperture thereby altering the acoustic loading on the drive unit and changing its response. The shutter can be adjusted in production to compensate either for different drive unit characteristics or for a variety of styles of earpad and the materials used for its construction.
  • the shutter can in its simplest form be a tube of diameter slightly larger than the rear housing, that is slid into the correct position and secured in place by screwing or gluing, or a thread may be formed in manufacture allowing the shutter to be positioned by rotating it, or else a ratchet mechanism may be employed in order to dispense with any other form of fixing. Any gap between the shutter and housing may be closed by having a layer of felt between the housing and shutter.
  • the rear housing may be designed to enclose the circuit board, or else the circuit board could form the end of the housing. In either instance, the housing can be designed to allow the circuit board to be positioned at a variety of distances from the drive unit thereby allowing the volume of the cavity behind the drive unit to be adjusted.
  • the microphone may also be made removable so that one headset moulding can suit all purposes. In the field the headset can then quickly be re-configured from passive to active mode just by plugging in a microphone and electronics module from a spares bin. It is preferable in this case to include sensitivity adjustments on both the microphone and the drive unit.
  • Batteries may be used in the active module, but these would require replacement by the cabin crew at irregular intervals dependent upon the actual use of the headset and would require a stock of batteries to be held on board the aircraft. The cost and impracticability of such a scheme would be detrimental to the acceptance of the headset.
  • the batteries may be zinc-air types. These have a very high energy density and so are small and lightweight, but at the expense of needing to be used continually until exhaustion to obtain the maximum capacity. This would not necessarily be a problem with use of the headset in commercial airlines, as the aircraft has to be kept in almost perpetual use due to the cost of downtime.
  • the power drain of the electronics requires to be kept as low as possible. Only so much can be accomplished by careful design. For applications where the use may be more intermittent it would be desirable to be able to turn the headset on and off. This could easily be accomplished with a manually operated switch but the likelihood is that this would be forgotten by the cabin crew as the headsets are collected. Because the headband has only a limited life, an ON/OFF switch may be constructed into the headband as a very cheap mechanism that turns the headset on when the headband is stretched open to be worn, as it will not have to last for long. It may even be made part of the battery contact mechanism.
  • the control signal could be an inaudible infrasonic or ultrasonic tone that is mixed into the entertainment signal path.
  • the headset would incorporate a very low power detection system that would only bring the rest of the electronics to life on receipt of the tone.
  • a DC offset could be added to the entertainment signal that the headset could recognise.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Headphones And Earphones (AREA)
  • Window Of Vehicle (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Stereophonic Arrangements (AREA)

Claims (17)

  1. Ensemble de casque à écouteurs présentant une réduction active du bruit ("active noise reduction" - ANR) pour les bruits de l'environnement, comprenant pour chaque oreille une première partie contenant une coquille d'écouteur portée par le serre-tête et une deuxième partie contenant au moins une carte de circuit portant l'électronique de l'ANR, la deuxième partie pouvant être séparée mécaniquement et électriquement de la première partie, la connexion et la séparation électriques étant activées au moyen d'une fiche et d'une douille prévues sur les parties respectives qui, lorsqu'elles sont reliées, contiennent également une plaque de haut-parleur, une unité d'entraínement et un microphone de détection placés en relation fonctionnelle.
  2. Ensemble de casque à écouteurs selon la revendication 1, dans lequel la deuxième partie contient la plaque de haut-parleur, l'unité d'entraínement et le microphone de détection, la plaque de haut-parleur présentant une ouverture face à l'unité d'entraínement, un espace ventilé étant enfermé à l'arrière de l'unité d'entraínement, à distance de l'ouverture de la plaque de haut-parleur, la taille de l'évent pouvant être ajustée.
  3. Ensemble de casque à écouteurs selon la revendication 2, dans lequel le volume de l'espace ventilé peut être ajusté.
  4. Ensemble de casque à écouteurs selon la revendication 2 ou la revendication 3, dans lequel la plaque de haut-parleur présente un prolongement arrière, tubulaire perforé, fermé à ou vers l'arrière par la carte de circuit.
  5. Ensemble de casque à écouteurs selon la revendication 4, comprenant un obturateur mobile qui coopère avec la région perforée du prolongement.
  6. Ensemble de casque à écouteurs selon la revendication 4 ou la revendication 5 dans la mesure où elle dépend de la revendication 3, dans lequel la position de la carte de circuit peut être ajustée dans le sens axial dans le prolongement tubulaire.
  7. Ensemble de casque à écouteurs selon l'une quelconque des revendications 1 à 6, dans lequel la première partie est adaptée pour recevoir une variante de deuxième partie qui comprend une plaque de haut-parleur et une unité d'entraínement pour permettre la conversion en un casque à écouteurs non actif.
  8. Ensemble de casque à écouteurs selon l'une quelconque des revendications 1 à 7, dans lequel, pour établir la connexion et la séparation électrique entre les deux parties, la première partie porte la fiche électrique et la deuxième parie porte la douille électrique.
  9. Ensemble de casque à écouteurs selon la revendication 1, dans lequel la première partie comprend également un microphone de détection et l'électronique de l'ANR, la deuxième partie pouvant être engagée par coulissement sur la première partie.
  10. Ensemble de casque à écouteurs selon les revendications 1 à 9, dans lequel une résistance variable est associée à l'unité d'entraínement pour l'ajustement de la sensibilité.
  11. Ensemble de casque à écouteurs selon l'une quelconque des revendications 1 à 10, comprenant un potentiomètre associé au microphone de détection pour l'ajustement de la sensibilité.
  12. Ensemble de casque à écouteurs selon l'une quelconque des revendications 1 à 11, dans lequel la deuxième partie contient un couvercle qui complète la coquille de l'écouteur.
  13. Ensemble de casque à écouteurs selon l'une quelconque des revendications 1 à 12, dans lequel le microphone de détection constitue également une pièce séparée.
  14. Ensemble de casque à écouteurs selon l'une quelconque des revendications 1 à 13, destiné à être utilisé dans un avion et adapté pour recevoir un signal d'entraínement par l'intermédiaire d'un câble qui peut être relié au siège d'un passager.
  15. Ensemble de casque à écouteurs selon la revendication 14, également adapté pour recevoir un signal d'alimentation en énergie sur le câble qui peut être relié au siège.
  16. Ensemble de casque à écouteurs selon la revendication 14, alimenté par batterie.
  17. Ensemble de casque à écouteurs présentant une réduction active du bruit ("active noise reduction" - ANR) pour les bruits de l'environnement, comprenant pour chaque oreille une première partie contenant une coquille d'écouteur portée par le serre-tête et une deuxième partie comprenant une plaque de haut-parleur et une unité d'entraínement pour un casque à écouteurs non ANR, la deuxième partie pouvant être séparée mécaniquement et électriquement de la première partie par des moyens à fiche et à douille prévus sur les parties respectives, pour ainsi permettre la conversion de l'ensemble de casque à écouteurs en un casque à écouteurs avec ANR en remplaçant une deuxième partie dotée d'une carte de circuit ANR.
EP99907760A 1998-03-18 1999-03-10 Casque pour passagers d'avions Expired - Lifetime EP1077012B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9805618 1998-03-18
GBGB9805618.7A GB9805618D0 (en) 1998-03-18 1998-03-18 Headset for aircraft
PCT/GB1999/000720 WO1999048324A1 (fr) 1998-03-18 1999-03-10 Casque pour passagers d'avions

Publications (2)

Publication Number Publication Date
EP1077012A1 EP1077012A1 (fr) 2001-02-21
EP1077012B1 true EP1077012B1 (fr) 2002-06-05

Family

ID=10828674

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99907760A Expired - Lifetime EP1077012B1 (fr) 1998-03-18 1999-03-10 Casque pour passagers d'avions

Country Status (8)

Country Link
EP (1) EP1077012B1 (fr)
AT (1) ATE218787T1 (fr)
AU (1) AU2739099A (fr)
CA (1) CA2323798C (fr)
DE (1) DE69901706T2 (fr)
DK (1) DK1077012T3 (fr)
GB (1) GB9805618D0 (fr)
WO (1) WO1999048324A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1659924B (zh) * 2002-06-20 2010-12-29 Gn奈康有限公司 耳机
US8391530B2 (en) 2009-01-16 2013-03-05 Sennheiser Electronic Gmbh & Co. Kg Helmet and apparatus for active noise suppression
DE102022103596A1 (de) 2021-10-04 2023-04-06 ODM GmbH Hörmuschel

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10327053A1 (de) * 2003-06-16 2005-01-05 Volkswagen Ag Audiosystem zum parallelen Hören unterschiedlicher Audioquellen
DE102004039066B4 (de) * 2003-09-16 2015-03-12 Volkswagen Ag Audiosystem für ein Kraftfahrzeug
TWI312259B (en) * 2006-06-29 2009-07-11 Cotron Corporatio In-ear type earphone with adjustable volume of front chamber between speaker and housing
TW200803584A (en) * 2006-06-29 2008-01-01 Cotron Corp In-ear type earphone with adjustable area of sound hole on housing behind speaker
TWI308844B (en) * 2006-06-29 2009-04-11 Cotron Corp In-ear type earphone with adjustable volume of rear chamber between speaker and housing
ATE548725T1 (de) 2008-10-31 2012-03-15 Austriamicrosystems Ag Aktive rauschsteueranordnung, aktiver rauschsteuerungskopfhörer und kalibrierungsverfahren

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4517418A (en) * 1983-11-07 1985-05-14 Koss Corporation Portable stereophone
GB2176672B (en) * 1985-06-14 1989-07-05 Houng Huang Kiang Adjustable radio headset
GB2279202B (en) * 1993-06-09 1997-05-21 Michael John Fogarty Electronic conversion for passive ear muffs

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1659924B (zh) * 2002-06-20 2010-12-29 Gn奈康有限公司 耳机
US8391530B2 (en) 2009-01-16 2013-03-05 Sennheiser Electronic Gmbh & Co. Kg Helmet and apparatus for active noise suppression
DE102022103596A1 (de) 2021-10-04 2023-04-06 ODM GmbH Hörmuschel
DE102022103596B4 (de) 2021-10-04 2023-09-21 ODM GmbH Hörmuschel

Also Published As

Publication number Publication date
ATE218787T1 (de) 2002-06-15
DE69901706D1 (de) 2002-07-11
WO1999048324A1 (fr) 1999-09-23
DK1077012T3 (da) 2002-07-08
DE69901706T2 (de) 2003-01-09
GB9805618D0 (en) 1998-05-13
CA2323798A1 (fr) 1999-09-23
AU2739099A (en) 1999-10-11
CA2323798C (fr) 2006-01-24
EP1077012A1 (fr) 2001-02-21

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