EP0993229A2 - Audiokomminikationssytem - Google Patents

Audiokomminikationssytem Download PDF

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Publication number
EP0993229A2
EP0993229A2 EP19990117740 EP99117740A EP0993229A2 EP 0993229 A2 EP0993229 A2 EP 0993229A2 EP 19990117740 EP19990117740 EP 19990117740 EP 99117740 A EP99117740 A EP 99117740A EP 0993229 A2 EP0993229 A2 EP 0993229A2
Authority
EP
European Patent Office
Prior art keywords
signal
sound
unit
compensation
sound signal
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Withdrawn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
EP19990117740
Other languages
German (de)
English (en)
French (fr)
Inventor
Klaus Höttges
Uwe Hoppe
Volker Petri
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.)
Daimler AG
Original Assignee
DaimlerChrysler AG
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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP0993229A2 publication Critical patent/EP0993229A2/de
Withdrawn legal-status Critical Current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
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • 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
    • H04R5/02—Spatial or constructional arrangements of loudspeakers

Definitions

  • the invention relates to an audio communication system, in particular for a motor vehicle, with a first system part with a first speaker unit that a first sound information signal a first sound signal source can be fed, and one second system part with a second loudspeaker unit, the a second sound information signal from a second sound signal source is feedable.
  • a headphone system is known from EP 0 468 610 B1 which is used for actively suppressing outside noise.
  • This headphone system has two speaker units, close to the right and the left ear.
  • Each speaker unit is a External microphone assigned, its output signal in a control unit inverted and via a mixing unit the speaker units is fed.
  • the headphone system provided a residual microphone that the Sound from the speaker units is exposed and its Output signal is also fed to the mixing unit.
  • Optional is an input for a speech microphone for the headphone system or provided for further signals.
  • DE 36 27 002 A1 discloses a headphone system for the delivery of Sound information signals to a user in which an active Interference with ambient noise is compensated. Is to assigned a reference microphone to the headphone system, which is outside of headphones and ambient noise records to convert it into electrical signals. This electrical Signals are filtered using a noise compensation filter that the transfer function between the reference microphone and Ear simulates, and in inverted form the sound information signals overlaid on a speaker in headphones become.
  • DE 37 33 132 A1 describes a headphone system with active noise suppression described, the function of which largely corresponds to the headphone system from DE 36 27 002 A1, however, a reference microphone is placed within a headphone is. In order to avoid unwanted feedback between microphone and loudspeaker signals, there are in this headphone system at least two interference compensation filters are provided. Another reference microphone outside the headphones is optional arranged.
  • the invention is a technical problem of providing based on an audio communication system of the type mentioned at the beginning, the sound signals of a first e.g. installed in the vehicle Loudspeaker unit for certain listeners who are in the sphere of influence this first and a second speaker unit are able to suppress, so that these listeners the Most of the sound information from the second loudspeaker unit can hear undisturbed.
  • a first e.g. installed in the vehicle Loudspeaker unit for certain listeners who are in the sphere of influence this first and a second speaker unit are able to suppress, so that these listeners the Most of the sound information from the second loudspeaker unit can hear undisturbed.
  • This problem is solved according to the invention in that a Compensation unit is provided, which the sound information signal the first sound signal source in phase opposition to the sound information signal added to the second signal source.
  • audio communication system is at least one of the two speaker units designed as a headphone unit. That way it is in one Motor vehicle possible, regardless of the position of a Motor vehicle occupants in the rear area of the motor vehicle Sound signal from the first loudspeaker unit as far as possible to compensate, with the second speaker unit e.g. the Use of any headphones is possible.
  • the compensation unit has a phase and frequency correction stage and an inverting matching amplifier and mixes the sound information signal from the second sound signal source one from the sound information signal of the first sound signal source derived compensation signal so that at the ear of a listener concerned from the first loudspeaker unit sound signal originating from that originating from the compensation signal Proportion of that emitted by the second loudspeaker unit Sound signal is extinguished. Guaranteed in this way simple signal processing in the compensation unit, that e.g. People listening to signals on headphones want, not by signals from another speaker unit be disturbed.
  • the audio communication system shown in FIG. 1a has a first system part 1 of conventional construction, the one Usual vehicle loudspeaker unit 9 includes the one Sound information signal 22 is fed.
  • This sound information signal 22 represents the output signal of a power amplifier 8, which is preceded by a preamplifier 7 with a tone control network is.
  • Preamplifier 7 and power amplifier 8 are used for amplifying a sound signal 20 which can be selected from a comes from several sound signal sources 4, 5, for example from an AM / FM tuner, a CD drive, a cassette player or be formed on a telephone or represent a television sound can.
  • the sound signal sources 4, 5 can be selected via a changeover switch 6.
  • a second system part 2 forms a rear room communication system and includes a headphone unit 17, a power amplifier 16 and a preamplifier 14 with tone control network that made Sound signal sources 10, 11 are fed to the sound signal sources 4, 5 of the first system part 1 correspond to one AF / FM tuner, CD drive, etc. can include.
  • the first and the second system part 1, 2 are by a compensation unit 3 connected to an inverting matching amplifier 19 with an upstream phase and frequency correction stage 18 has.
  • the compensation unit 3 will Sound signal 22 supplied from the first system part 1, preferably in its reinforced form in which it is the speaker unit 9 is supplied, for which it is then between the associated Power amplifier 8 and the speaker unit 9 tapped becomes.
  • the sound signal 22 supplied to the compensation unit 3 is frequency-selectively subjected to a phase shift and multiplied by a gain factor.
  • the compensation unit 3 the unamplified signal 20th or to supply the preamplified signal 21 only, as in FIG. 1a indicated by dashed lines.
  • a mixing unit 15 which is shown in Fig. 1a is symbolically represented as a two-resistor network.
  • the mixing unit 15 becomes the output signal 23 of the preamplifier 14 superimposed on the output signal 25 of the compensation unit 3.
  • the downstream power amplifier 16 and thus the Headphone unit 17 is thus supplied with a signal that from one of the group of sound signal sources 10, 11 by means of a Switch 13 selectable signal corresponds, but in addition one with respect to the sound signal 22 for the loudspeaker unit 9 of the first system part 1 antiphase signal is superimposed.
  • FIG. 1b compared to that of Fig. 1a are slightly modified audio communication system Components, as far as their function of those from the audio communication system 1a corresponds to the same reference numerals as provided in Fig. 1a.
  • Fig. 1a differs from the audio communication system shown in Fig. 1b only in that now the headphone unit 17 from system part 2 from the same sound signal sources 4, 5, which are provided in the first system part 1 is fed.
  • the outputs of sound signal sources 4, 5 in system part 1 via connecting lines 12a, 12b additionally parallel in the System part 2 laid.
  • the switch 13 in the second system part 2 can thus for the preamplifier 14 in the second part of the system 2 an input signal from the same group of sound signal sources can be selected from which the input signal 20 for the preamplifier 7 comes from the first system part 1.
  • FIG. 2 are for the audio communication systems of Fig. 1a and FIG. 1b schematically the loudspeaker unit 9 of the first system part 1, the headphone unit 17 of the second system part 2 and the ear 26 of a motor vehicle occupant, who the Headphone unit 17 carries.
  • a sound signal A which is connected to the Headphone unit 17 covered ear 26 of the occupant on the value xA, with 0 ⁇ x ⁇ 1, is damped.
  • the sound signal from the headphone unit 17 corresponds to the superimposition of a component B, the sound signal source selected for the second system part goes back, with a regarding the sound signal A opposite phase and with a compensation factor y, with 0 ⁇ y ⁇ 1, provided sound signal component -yA by the first system part 1 originates so that the headphone unit 17 the ear 26 of the occupant applied with a sound signal B-yA + xA.
  • the compensation unit 3 will be the frequency selective phase shift and the gain factor is now set so that over the entire Frequency range at least approximately at the ear 26 of the occupant x ⁇ y applies so that the occupant essentially only that desired sound information signal B hears.
  • the compensation unit 3 instead of the compensation unit 3 with an inverting as shown Matching amplifier 19 and phase and frequency correction stage 18, it is possible to use the compensation unit also to be formed by a signal processor, which either the input signal 20 of the preamplifier 7, the signal 21 between Preamplifier 7 and power amplifier 8 or the output signal 22 of the power amplifier 8 is supplied.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Headphones And Earphones (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
EP19990117740 1998-10-10 1999-09-09 Audiokomminikationssytem Withdrawn EP0993229A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998146821 DE19846821B4 (de) 1998-10-10 1998-10-10 Audiokommunikationssystem
DE19846821 1998-10-10

Publications (1)

Publication Number Publication Date
EP0993229A2 true EP0993229A2 (de) 2000-04-12

Family

ID=7884101

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990117740 Withdrawn EP0993229A2 (de) 1998-10-10 1999-09-09 Audiokomminikationssytem

Country Status (3)

Country Link
EP (1) EP0993229A2 (ja)
JP (1) JP2000125398A (ja)
DE (1) DE19846821B4 (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005004533A1 (en) * 2003-07-01 2005-01-13 University Of Southampton Sound reproduction systems for use by adjacent users
WO2007127842A2 (en) * 2006-04-26 2007-11-08 Bose Corporation Communicating with active noise reducing headset
US8189803B2 (en) 2004-06-15 2012-05-29 Bose Corporation Noise reduction headset
US8995679B2 (en) 2011-12-13 2015-03-31 Bose Corporation Power supply voltage-based headset function control
US9049513B2 (en) 2012-09-18 2015-06-02 Bose Corporation Headset power source managing

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010109614A1 (ja) * 2009-03-25 2010-09-30 パイオニア株式会社 音声信号処理装置及び音声信号処理方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3627002A1 (de) * 1986-08-08 1988-02-18 Philips Patentverwaltung Verfahren und schaltungsanordnung zur akustischen kompensation des umgebungsgeraeusches bei kopfhoererempfang
DE3733132A1 (de) * 1987-10-01 1989-04-13 Philips Patentverwaltung Schaltungsanordnung zur akustischen kompensation des umgebungsgeraeusches bei kopfhoererempfang
US5134659A (en) * 1990-07-10 1992-07-28 Mnc, Inc. Method and apparatus for performing noise cancelling and headphoning

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005004533A1 (en) * 2003-07-01 2005-01-13 University Of Southampton Sound reproduction systems for use by adjacent users
GB2418562A (en) * 2003-07-01 2006-03-29 Univ Southampton Sound reproduction systems for use by adjacent users
GB2418562B (en) * 2003-07-01 2006-10-18 Univ Southampton Sound reproduction systems for use by adjacent users
US8189803B2 (en) 2004-06-15 2012-05-29 Bose Corporation Noise reduction headset
WO2007127842A2 (en) * 2006-04-26 2007-11-08 Bose Corporation Communicating with active noise reducing headset
WO2007127842A3 (en) * 2006-04-26 2008-08-07 Bose Corp Communicating with active noise reducing headset
US8995679B2 (en) 2011-12-13 2015-03-31 Bose Corporation Power supply voltage-based headset function control
US9049513B2 (en) 2012-09-18 2015-06-02 Bose Corporation Headset power source managing

Also Published As

Publication number Publication date
JP2000125398A (ja) 2000-04-28
DE19846821B4 (de) 2004-04-15
DE19846821A1 (de) 2000-04-27

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