WO1999048324A1 - Casque pour passagers d'avions - Google Patents

Casque pour passagers d'avions Download PDF

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Publication number
WO1999048324A1
WO1999048324A1 PCT/GB1999/000720 GB9900720W WO9948324A1 WO 1999048324 A1 WO1999048324 A1 WO 1999048324A1 GB 9900720 W GB9900720 W GB 9900720W WO 9948324 A1 WO9948324 A1 WO 9948324A1
Authority
WO
WIPO (PCT)
Prior art keywords
assembly according
headset
headset assembly
anr
drive unit
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.)
Ceased
Application number
PCT/GB1999/000720
Other languages
English (en)
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
Original Assignee
NCT Group Inc
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 NCT Group Inc filed Critical NCT Group Inc
Priority to EP99907760A priority Critical patent/EP1077012B1/fr
Priority to CA002323798A priority patent/CA2323798C/fr
Priority to DE69901706T priority patent/DE69901706T2/de
Priority to DK99907760T priority patent/DK1077012T3/da
Priority to AU27390/99A priority patent/AU2739099A/en
Priority to AT99907760T priority patent/ATE218787T1/de
Publication of WO1999048324A1 publication Critical patent/WO1999048324A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/033—Headphones for stereophonic communication

Definitions

  • This invention relates to a 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 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 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.
  • 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 ea ⁇ hone 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 drive unit for providing conversion to a non-active headset.
  • the first part comprises a baffle plate and the second part includes an ea ⁇ hone shell, and at least a sensing microphone and ANR electronics carried by the shell.
  • the second part also includes the drive unit.
  • the second part comprises the ANR electronics, and may also include a cover part for completing the ea ⁇ hone 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.
  • Figure 1 illustrates one embodiment of headset
  • Figure 2 shows a substitute module
  • Figure 3 illustrates a second embodiment of headset
  • Figure 5 illustrates a third embodiment of headset
  • Figure 6 shows a modification
  • Figure 7 shows a fourth embodiment of headset.
  • the module 101 consists of a baffle assembly 102 which holds the sensing microphone 103, ea ⁇ hone 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 ea ⁇ hone 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 -5- 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 no build up of scuff marks to detract from the appearance of the headset.
  • the illustrated components of the module are the ea ⁇ hone 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.
  • the drive unit can be a part of the ea ⁇ hone shell module, with the baffle plate 122 A 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 inco ⁇ orated 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 ea ⁇ iece 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 ea ⁇ ads, e.g. 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 101 A inco ⁇ orates 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 ea ⁇ ad 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. -7-
  • 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 pu ⁇ oses. 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 pe ⁇ etual 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 inco ⁇ orate 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)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Stereophonic Arrangements (AREA)
  • Window Of Vehicle (AREA)

Abstract

L'invention concerne un casque réducteur de bruit, en particulier, un casque prévu pour des passagers d'avions, selon lequel chaque écouteur comprend au moins deux parties, à savoir, une partie supportée par le ruban serre-tête (108), et une autre partie (101) reliée, tant du point de vue mécanique que électrique, à la première partie. Le composant ou les composants nécessitant d'être souvent remplacés sont supportés par une partie, tandis que la deuxième partie peut être réutilisée.
PCT/GB1999/000720 1998-03-18 1999-03-10 Casque pour passagers d'avions Ceased WO1999048324A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP99907760A EP1077012B1 (fr) 1998-03-18 1999-03-10 Casque pour passagers d'avions
CA002323798A CA2323798C (fr) 1998-03-18 1999-03-10 Casque pour passagers d'avions
DE69901706T DE69901706T2 (de) 1998-03-18 1999-03-10 Kopfhörer für flugzeug
DK99907760T DK1077012T3 (da) 1998-03-18 1999-03-10 Hovedtelefon til Luftfartøj
AU27390/99A AU2739099A (en) 1998-03-18 1999-03-10 Headset for aircraft
AT99907760T ATE218787T1 (de) 1998-03-18 1999-03-10 Kopfhörer für flugzeug

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9805618.7 1998-03-18
GBGB9805618.7A GB9805618D0 (en) 1998-03-18 1998-03-18 Headset for aircraft

Publications (1)

Publication Number Publication Date
WO1999048324A1 true WO1999048324A1 (fr) 1999-09-23

Family

ID=10828674

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1999/000720 Ceased WO1999048324A1 (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 (4)

* 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
US7519196B2 (en) 2002-06-20 2009-04-14 Gn Netcom A/S Headset
DE102004039066B4 (de) * 2003-09-16 2015-03-12 Volkswagen Ag Audiosystem für ein Kraftfahrzeug
US9779714B2 (en) 2008-10-31 2017-10-03 Ams Ag Active noise control arrangement, active noise control headphone and calibration method

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW200803584A (en) * 2006-06-29 2008-01-01 Cotron Corp In-ear type earphone with adjustable area of sound hole on housing behind speaker
TWI312259B (en) * 2006-06-29 2009-07-11 Cotron Corporatio In-ear type earphone with adjustable volume of front chamber between speaker and housing
TWI308844B (en) * 2006-06-29 2009-04-11 Cotron Corp In-ear type earphone with adjustable volume of rear chamber between speaker and housing
DE102009005302B4 (de) 2009-01-16 2022-01-05 Sennheiser Electronic Gmbh & Co. Kg Schutzhelm und Vorrichtung zur aktiven Störschallunterdrückung
DE102022103596B4 (de) 2021-10-04 2023-09-21 ODM GmbH Hörmuschel
CN117479073A (zh) * 2023-12-07 2024-01-30 河源源丰电子有限公司 一种模组化头戴式耳机

Citations (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
GB2176672A (en) * 1985-06-14 1986-12-31 Houng Huang Kiang Adjustable radio headset
GB2279202A (en) * 1993-06-09 1994-12-21 Michael John Fogarty Electronic conversion kit for passive ear muffs

Patent Citations (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
GB2176672A (en) * 1985-06-14 1986-12-31 Houng Huang Kiang Adjustable radio headset
GB2279202A (en) * 1993-06-09 1994-12-21 Michael John Fogarty Electronic conversion kit for passive ear muffs

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7519196B2 (en) 2002-06-20 2009-04-14 Gn Netcom A/S Headset
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
US9779714B2 (en) 2008-10-31 2017-10-03 Ams Ag Active noise control arrangement, active noise control headphone and calibration method

Also Published As

Publication number Publication date
GB9805618D0 (en) 1998-05-13
CA2323798C (fr) 2006-01-24
DE69901706D1 (de) 2002-07-11
AU2739099A (en) 1999-10-11
EP1077012A1 (fr) 2001-02-21
DK1077012T3 (da) 2002-07-08
CA2323798A1 (fr) 1999-09-23
ATE218787T1 (de) 2002-06-15
DE69901706T2 (de) 2003-01-09
EP1077012B1 (fr) 2002-06-05

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