EP1104221A2 - Dispositif de sonorisation - Google Patents

Dispositif de sonorisation Download PDF

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Publication number
EP1104221A2
EP1104221A2 EP00124848A EP00124848A EP1104221A2 EP 1104221 A2 EP1104221 A2 EP 1104221A2 EP 00124848 A EP00124848 A EP 00124848A EP 00124848 A EP00124848 A EP 00124848A EP 1104221 A2 EP1104221 A2 EP 1104221A2
Authority
EP
European Patent Office
Prior art keywords
speakers
public address
phase
loudspeakers
address device
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
EP00124848A
Other languages
German (de)
English (en)
Other versions
EP1104221B1 (fr
EP1104221A3 (fr
Inventor
Gerhard Pfaffinger
Franz Lorenz
Markus Christoph
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.)
Harman Becker Automotive Systems GmbH
Original Assignee
Harman Audio Electronic Systems 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 Harman Audio Electronic Systems GmbH filed Critical Harman Audio Electronic Systems GmbH
Publication of EP1104221A2 publication Critical patent/EP1104221A2/fr
Publication of EP1104221A3 publication Critical patent/EP1104221A3/fr
Application granted granted Critical
Publication of EP1104221B1 publication Critical patent/EP1104221B1/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/02—Spatial or constructional arrangements of loudspeakers

Definitions

  • the invention relates to a sound system with four Speakers.
  • Each speaker has an essentially unchangeable one Radiation pattern.
  • loudspeakers in public address systems can only be characterized by their radiation characteristics a suitable arrangement of the speakers in the room and / or through additional mechanical aids such as acoustic reflectors or acoustic lenses to a small extent to be influenced.
  • additional mechanical aids such as acoustic reflectors or acoustic lenses to a small extent to be influenced.
  • a special challenge PA systems in motor vehicles since usually the locations for attaching the speakers are not freely selectable and secondly the space available not sufficient for additional mechanical aids.
  • the room to be sounded is usually relative small, so that for example in stereophonic sound adequate channel separation, especially with multiple listeners is often not sufficient.
  • JP 07-046 698 A shows a circuit arrangement with a left and a right audio signal channel, from each of which has a summation level in which the original Sound channel signal one phase shifted and in the amplitude of the proportion of the audio signal from the opposite channel is mixed in (cross coupling).
  • JP 06-315 198 A shows a similar circuit in which additionally a control device for setting the amplifier and the phase shifter in the cross coupling branches is provided. There are also loudspeakers at the outputs the circuit shown. JP 06-315 198 A thus shows a device in which sums of amplitude and Phase different input signals formed become.
  • JP 04-337 999 A discloses an arrangement with several Loudspeakers, which are controlled by phase shifters, by means of which the direction of radiation of the loudspeakers is changed can be.
  • FIG. 4 (2) is a Circuit shown with cross-coupling branches in which Attenuators and phase shifters are included. This Circuit part is in an overall circuit for expanding and Control of sound images ("sound fields") included.
  • the object of WO 97 30 466 A1 also aims to map virtual sound sources at predetermined locations. At the same time, the beam angle (e.g. 10 degrees) included by the speakers is taken into account.
  • filter circuits H 1 (z) and H 2 (z) are provided both in the main branches and in the cross-coupling branches, which cause phase shifts.
  • JP 02-241 296 A is an arrangement with four speakers known in the front of a car Driver and the front passenger are arranged and operated that both perceive a usable stereo sound image can.
  • the object of the invention is therefore a public address system specify their radiation characteristics without changing their position the speaker and without additional mechanical aids is changeable.
  • the advantage of the invention is that the radiation characteristic is based on is electronically changeable and therefore the necessary Device has a relatively small space requirement, must not be placed near the speakers and is easy to manufacture in large series.
  • a sound system with four speakers and at least one two Upstream speakers, controlled by two input signals
  • Signal processing device for generating Control signals for the respective two speakers, where the control signals are equal to the sum of the amplitude and phase of input signals evaluated differently are such that the radiation characteristics of each two speakers from the evaluation of the input signals depends.
  • the signal processing device can be in analog and / or equally in digital circuit technology will be realized. By changing the phases and / or Damping / reinforcements can thus be the desired Radiation pattern can be set.
  • the signal processing device preferably has two adders on which each with the interposition of a first Phase shifter and a first coefficient element each one of the input signals and with interposition a second phase shifter and a second coefficient element the other input signal is fed. This makes it easy to set everyone separately Phases and amplitudes.
  • the first and second phase shifters are the same in each case Phase shifts and the first and second coefficient terms same damping / reinforcement.
  • phase shifters used that generate frequency-independent phase shifts So-called in particular come as phase shifters Hilbert transformers are used, which are frequency-independent Generate a 90 degree phase shift. Prefers however, the phase shifts can be changed. That around 90 Degrees phase-shifted signal can do this with the original Sig-nal be mixed appropriately to form a sig-nal of any phase shift with constant amplitude to obtain. This makes it easy to set the Phase shift reached without the frequency response of the individual loudspeaker changed by the control signal itself becomes.
  • phase shifters can also be used be at least only in a certain frequency range cause a frequency-independent phase shift, where tolerates the frequency shift in the other frequency ranges becomes. That being said, in certain cases also a certain frequency dependence of the control signal be desirable if, for example, deficits in the frequency response of the speaker can be compensated.
  • a phase shifter come analogue designed accordingly and / or digital filters are used.
  • the two are Speakers placed between the other two speakers, the main emission directions of the two a speaker at a certain angle to the perpendicular from each other are set away towards the other speakers.
  • the main emission directions of the others are preferably located Speakers at a certain angle to the vertical towards the one speaker.
  • an optimal one for two listeners Get adjustment In order to can be, for example, an optimal one for two listeners Get adjustment.
  • the other speakers can also be one (further) signal processing device are connected upstream, to make it easy to set the other speakers too to allow the radiation pattern.
  • two loudspeakers 1 and 2 are each controlled by one of two stereophonic input signals E1, E2 with the interposition of a power amplifier 3, 4 in each case.
  • a signal conditioning device 5 is connected upstream of the power amplifiers 3, 4, to which the input signals E 1 and E2 are supplied.
  • the input signal E 1 is fed to an adder 8 via a phase shifter 6 with a frequency-independent phase shift ⁇ 1 and via a coefficient element 7 with a coefficient K 1 representing a damping or amplification.
  • the adder 8 receives the input signal E 2 with the interposition of a phase shifter 9 with a frequency-independent phase shift ⁇ 2 and a coefficient element 10 with a coefficient K 2 representing a damping or amplification.
  • the adder 8 uses this to generate a drive signal A 1 for the power amplifier 3.
  • the input signal E 2 is fed to an adder 13 via a phase shifter 11 with the frequency-independent phase shift ⁇ 1 and via a coefficient element 12 with the coefficient K 1 .
  • the adder 13 also receives the input signal E 1 with the interposition of a phase shifter 14 with the frequency-independent phase shift ⁇ 2 and a coefficient element 10 with the coefficient K 2 and generates a drive signal A 2 for the power amplifier 4.
  • the input signals E 1 and E 2 are each fed to two phase shifters 6, 9 and 11, 14, respectively, which generate the phase shifts ⁇ 1 and ⁇ 2 .
  • the phase-shifted input signals E 1 and E 2 are then evaluated with the coefficients K 1 and K 2 , which act as weight factors, and then added "crosswise" - resulting in the control signals A 1 and A 2 .
  • the control signals A 1 and A 2 are supplied to the speakers 1 and 2.
  • a 1 and A 2 behave as follows depending on E 1 and E 2 , K 1 and K 2 , ⁇ 1 and ⁇ 2 :
  • a 1 K 1 ⁇ E 1 ( ⁇ 1 ) + K 2 ⁇ E 2 ( ⁇ 2 )
  • a 2 K 1 ⁇ E 2 ( ⁇ 1 ) + K 2 ⁇ E 1 ( ⁇ 2 )
  • phase shifts ⁇ 1 and ⁇ 2 are the preferred points for setting the azimuth of the main emission directions.
  • two further loudspeakers 18 and 19 are provided in addition to the loudspeakers 1 and 2 in connection with the signal conditioning device 5 from FIG. These are driven directly by the input signals E 1 and E 2 , the input signal E 1 forming the left channel L and the input signal E 2 forming the right channel R of a stereophonic signal.
  • the other loudspeakers 18 and 19 are arranged on the left and right of the loudspeakers 1 and 2 in such a way that the lobes 20, 21 of the main emission directions are directed inwards towards the loudspeakers 1 and 2.
  • the lobes 16 and 17 of the loudspeakers 1 and 2 are directed more towards the outside and away from each other.
  • speakers 18 and 19 can be installed in a suitable manner to produce the desired radiation pattern.
  • Figure 2 can be modified as shown in Figure 3.
  • the speakers 18 and 19 becomes a signal processing device 24, for example, like the signal processing device 5 is built upstream and the radiation characteristics adjusted so that the clubs 20 and 21 are directed more inwards are.
  • the arrangement can ultimately be able to adapt individually according to FIG. 3 in accordance with FIG. 4, that speakers 1 and 2 or 18 and 19 in pairs be arranged side by side.
  • speakers 1 and 2 or 18 and 19 in pairs be arranged side by side.
  • the lobes 20 and 21 and 16 and 17 are inclined towards each other.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Stereophonic System (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Surgical Instruments (AREA)
  • Recrystallisation Techniques (AREA)
  • Drying Of Semiconductors (AREA)
EP00124848A 1999-11-25 2000-11-14 Dispositif de sonorisation Expired - Lifetime EP1104221B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19956690A DE19956690A1 (de) 1999-11-25 1999-11-25 Beschallungseinrichtung
DE19956690 1999-11-25

Publications (3)

Publication Number Publication Date
EP1104221A2 true EP1104221A2 (fr) 2001-05-30
EP1104221A3 EP1104221A3 (fr) 2005-06-08
EP1104221B1 EP1104221B1 (fr) 2011-04-06

Family

ID=7930272

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00124848A Expired - Lifetime EP1104221B1 (fr) 1999-11-25 2000-11-14 Dispositif de sonorisation

Country Status (4)

Country Link
US (1) US7123724B1 (fr)
EP (1) EP1104221B1 (fr)
AT (1) ATE505035T1 (fr)
DE (2) DE19956690A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1280377A1 (fr) * 2001-07-27 2003-01-29 A&D Engineering Co., Ltd. Configuration de haut-parleurs et processeur de signal pour la reproduction sonore stéréo pour un véhicule et véhicule avec la configuration
WO2003041448A1 (fr) * 2001-11-08 2003-05-15 Harmann/Becker Automotive Systems (Straubing Division) Gmbh Ensemble de haut-parleurs plats
WO2003078204A3 (fr) * 2002-03-18 2003-12-04 Dieter Burmester Installation de haut-parleurs pour reception stereo dans des vehicules, notamment dans des voitures de tourisme

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10001410C2 (de) * 2000-01-14 2001-12-06 Harman Audio Electronic Sys Flachlautsprecheranordnung
US7728576B1 (en) * 2004-01-07 2010-06-01 The United States Of America As Represented By The Secretary Of The Air Force Programmable multi-channel amplitude and phase shifting circuit
US7420337B2 (en) * 2006-05-31 2008-09-02 Monolithic Power Systems, Inc. System and method for open lamp protection
JP7065414B2 (ja) * 2017-08-29 2022-05-12 パナソニックＩｐマネジメント株式会社 仮想音像制御システム、照明器具、厨房装置、天井部材、及びテーブル
FR3087608B1 (fr) * 2018-10-17 2021-11-19 Akoustic Arts Enceinte acoustique et procede de modulation pour une enceinte acoustique

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3757046A (en) * 1970-07-23 1973-09-04 T Williams Control signal generating device moving sound speaker systems including a plurality of speakers and a
JPS5585200A (en) * 1978-12-22 1980-06-26 Hitachi Ltd Reproducing unit of virtual stereo sound
JPH01151399A (ja) * 1987-12-08 1989-06-14 Mitsubishi Electric Corp 音響再生装置
EP0357034A3 (fr) * 1988-08-30 1991-08-07 Nec Corporation Système de traitement de signal audio réalisant la commande d'équilibrage en amplitude et en phase du signal audio
JPH02241296A (ja) 1989-03-15 1990-09-25 Matsushita Electric Ind Co Ltd カーオーディオ装置
US5305386A (en) * 1990-10-15 1994-04-19 Fujitsu Ten Limited Apparatus for expanding and controlling sound fields
JPH04337999A (ja) 1991-05-15 1992-11-25 Matsushita Electric Ind Co Ltd 超指向性音響再生装置
US5325435A (en) * 1991-06-12 1994-06-28 Matsushita Electric Industrial Co., Ltd. Sound field offset device
JPH06315198A (ja) * 1993-04-28 1994-11-08 Sharp Corp 音声出力回路
JP3500615B2 (ja) 1993-07-30 2004-02-23 オンキヨー株式会社 音場処理装置及び音場再生装置
JP3276528B2 (ja) * 1994-08-24 2002-04-22 シャープ株式会社 音像拡大装置
FR2736499B1 (fr) * 1995-07-03 1997-09-12 France Telecom Procede de diffusion d'un son avec une directivite donnee
GB9603236D0 (en) * 1996-02-16 1996-04-17 Adaptive Audio Ltd Sound recording and reproduction systems
US5889867A (en) * 1996-09-18 1999-03-30 Bauck; Jerald L. Stereophonic Reformatter
WO1998054926A1 (fr) * 1997-05-28 1998-12-03 Bauck Jerald L Enceinte acoustique permettant d'amplifier le point ideal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1280377A1 (fr) * 2001-07-27 2003-01-29 A&D Engineering Co., Ltd. Configuration de haut-parleurs et processeur de signal pour la reproduction sonore stéréo pour un véhicule et véhicule avec la configuration
WO2003041448A1 (fr) * 2001-11-08 2003-05-15 Harmann/Becker Automotive Systems (Straubing Division) Gmbh Ensemble de haut-parleurs plats
WO2003078204A3 (fr) * 2002-03-18 2003-12-04 Dieter Burmester Installation de haut-parleurs pour reception stereo dans des vehicules, notamment dans des voitures de tourisme

Also Published As

Publication number Publication date
EP1104221B1 (fr) 2011-04-06
DE19956690A1 (de) 2001-07-19
EP1104221A3 (fr) 2005-06-08
ATE505035T1 (de) 2011-04-15
US7123724B1 (en) 2006-10-17
DE50016090D1 (de) 2011-05-19

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