WO2017144774A1 - Système de reproduction sonore - Google Patents

Système de reproduction sonore Download PDF

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Publication number
WO2017144774A1
WO2017144774A1 PCT/FI2017/050105 FI2017050105W WO2017144774A1 WO 2017144774 A1 WO2017144774 A1 WO 2017144774A1 FI 2017050105 W FI2017050105 W FI 2017050105W WO 2017144774 A1 WO2017144774 A1 WO 2017144774A1
Authority
WO
WIPO (PCT)
Prior art keywords
audio signal
playing area
difference
center
right audio
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/FI2017/050105
Other languages
English (en)
Inventor
Joni ONNIA
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.)
Panphonics Oy
Original Assignee
Panphonics Oy
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 Panphonics Oy filed Critical Panphonics Oy
Publication of WO2017144774A1 publication Critical patent/WO2017144774A1/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
    • H04R5/00—Stereophonic arrangements
    • H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems
    • H04S1/002—Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution

Definitions

  • the invention relates to a sound reproducing system in which the audio input signal to the system is converted into a stereo sound image.
  • the stereo sound image is traditionally so produced that the sum R+L of the input left and right channels is fed to the center speaker, the difference L-R of the left and right channel is fed to the left side speaker, and the difference R-L of the right and left channel is fed to the right side speaker.
  • the outermost speakers are placed at an angle in relation to the center speaker. In order to work, such a system requires around it room reflections, in which case the system does not work very well in a free field or asymmetric space.
  • the speakers are placed parallel, side by side, but far from each other.
  • the invention is based on a sound reproducing system which comprises a converter for modifying the input audio signals, at least two amplifiers for amplifying the audio signals, and a panel sound element for receiving said modified audio signals to form a stereo sound image.
  • a panel sound element which enables the forming of a wide, directional stereo sound image extending outside of the physical borders of the element.
  • the panel sound element comprises three playing areas positioned adequately close to each other, whereby the passive area left at the junctions of the areas is formed as small as possible due to the minor frame structure and mounting requirements.
  • the width of the playing areas matches the distance between the ears, whereby the stereo sound image will not be distorted.
  • the sound can also be made to reproduce uniform on the entire surface of the panel sound element, so on the line of the junctions the frequency response and phase are favourable to form the right kind of wavefront.
  • Figure 1 shows a schematic diagram of a sound reproducing system
  • Figure 2 shows a panel sound element seen from the front
  • FIG. 3 shows the panel sound element from the above
  • Figure 4 shows schematically a method for converting the signals into a stereo sound image.
  • Figure 1 shows a schematic diagram of a sound reproducing system, in which the left audio signal L and the right audio signal R input to the system may be converted into a stereo sound image.
  • the sound reproducing system comprises a converter 3, at least two amplifiers 1, 2 and a panel sound element 4 (Figure 2), which may comprise a left playing area A, a center playing area B, and a right playing area C.
  • the left audio signal L and the right audio signal R may be modified with a matrix into a sum L+R of the left and right audio signal.
  • the converter 3 allows the modification of the input left and right audio signals L, R into a difference L-R of the left and right audio signal, and into the difference R-L of the right and left audio signal.
  • the converter 3 is advantageously an MS matrix.
  • the amplifiers 1, 2 of the sound reproducing system may be adapted to amplify the sum L+R of the right and left audio signal, the difference L-R of the left and right audio signal, and the difference R-L of the right and left audio signal.
  • the center playing area B of the panel sound element 4 in the sound reproducing system may be adapted to receive the sum L+R of the left and right audio signal
  • the left playing area A may be adapted to receive the difference L-R of the left and right audio signal
  • the right playing area C may be adapted to receive the difference R-L of the right and left channel to form a stereo sound image.
  • the input of the first amplifier 1 may be connected to the first output of the converter 3
  • the input of the second amplifier 2 may be connected to the second output of the converter 3.
  • the first amplifier 1 may in this case amplify the sum L+R of the left and right audio signal output from the first output of the converter 3.
  • the second amplifier 2 may amplify the difference L-R of the left and right audio signal and the difference R-L of the right and left audio signal output from the second output of the converter 3.
  • the panel sound element 4 may be connected to the amplifiers 1, 2 so that the input of the center playing area B may be connected to the output of the first amplifier 1.
  • the inputs of the left and right playing areas A, C may be connected to the output of the second amplifier 2.
  • the center playing area B may be adapted to produce the sum L+R of the left and right audio signal from the audio signal of the output of the first amplifier 1.
  • the left playing area A may be adapted to produce the difference L-R of the left and right audio signal from the audio signal of the output of the first amplifier 2.
  • the right playing area C may be adapted to produce the difference R-L of the right and left audio signal from the audio signal of the output of the first amplifier 2.
  • the sound reproducing system comprises the converter 3, at least two amplifiers 1, 2. and panel sound element 4 of Figure 1.
  • the converter 3 for producing the sum or difference of the left and right audio signal L, R may be placed after the amplifiers 1, 2.
  • the first amplifier 1 may be adapted to amplify the left audio signal L
  • the second amplifier 2 may be adapted to amplify the right audio signal R.
  • the first input of the converter 3 may be connected to the output of the first amplifier 1 and the second input of the converter 3 may be connected to the output of the second amplifier 2. Both outputs of the converter 3 may for their part be connected to the panel sound element 4.
  • phasing may take place before or after the amplifiers 1, 2.
  • the summing, differencing and phasing of the left and right audio signals L, R may be carried out analogically or digitally.
  • FIG. 2 shows a panel sound element 4 seen from the front;
  • the panel sound element 4 may comprise a left playing area A, a center playing area B, and a right playing area C.
  • the playing areas A, B, C may be positioned in parallel very close to each other in the same plane.
  • the playing areas A, B, C are located less than 1 cm from each other, or in contact with each other.
  • the junctions D, E of the playing areas A, B, C may be positioned close to the average distance between human ears, so the width t of the center area is advantageously 10 to 25 cm.
  • the proportions of the left and right playing area A, C, such as width and height, are advantageously the same as those of the center playing area B.
  • Figure 3 shows a panel sound element 4 seen from the above.
  • the sounds positioned at the center may be reproduced from the center playing area B, only, whereby the sound signal R+L passes freely to the observer's 7 both ears.
  • the center playing area B and the left playing area A may be adapted to play in the same phase, and the right playing area C to play in the anti-phase, whereby an acoustic center point 5 may be formed on the line of the junction D of the center and left playing area A, B.
  • the center playing area B and the right playing area C are adapted to play in the same phase, and the left playing area A to play in the anti-phase to form an acoustic center point 6 on the line of the junction E of the center and right playing area B, C.
  • the stereo sound image may be detected on the line of the junctions D, E.
  • Figure 4 shows an example of converting a left audio signal L and a right audio signal R input to a sound reproducing system into a stereo sound image.
  • the sound reproducing system comprises a converter 3, at least two amplifiers 1, 2 and a panel sound element 4 , which panel sound element 4 comprises a left playing area A, a center playing area B, and a right playing area C.
  • the left audio signal L and the right audio signal R are modified 41 in the converter 3 by means of a matrix into the sum L+R of the left and right audio signal, the difference L-R of the left and right audio signal, and the difference R-L of the left and right audio signal.
  • at least two amplifiers 1, 2 are adapted 42 to amplify the left audio signal L and the right audio signal R; or the sum L+R of the left and right audio signal, the difference L-R of the left and right audio signal, and the difference R-L of the left and right audio signal.
  • the center playing area B is adapted 43 to receive the sum L+R of the left and right audio signal.
  • the left playing area A is adapted to receive the difference L-R of the left and right audio signal
  • the right playing area C is adapted to receive the difference R-L of the right and left audio signal to form a stereo sound image.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Stereophonic System (AREA)

Abstract

L'invention concerne un système de reproduction sonore et un procédé servant à convertir un signal audio d'entrée gauche (L) et un signal audio d'entrée droit (R) en une image sonore stéréo. Le système de reproduction sonore selon l'invention comprend un convertisseur (3), au moins deux amplificateurs (1, 2) et un élément sonore de panneau (4), ce dernier (4) comprenant une zone de lecture gauche (A), une zone de lecture centrale (B) et une zone de lecture droite (C). Dans le système de reproduction sonore selon l'invention, le convertisseur (3) peut être adapté pour modifier le signal audio gauche (L) et le signal audio droit (R), au moyen d'une matrice, en somme (L+R) du signal audio gauche et droit, en différence (L-R) du signal audio gauche et droit et en différence (R-L) du signal audio droit et gauche ; au moins deux amplificateurs (1, 2) peuvent être adaptés pour amplifier les signaux audio gauche et droit (L et R) ou leur somme (L+R) et différences (L-R) et (R-L) ; et la zone de lecture centrale (B) de l'élément sonore de panneau (4) peut être adaptée pour recevoir la somme (L+R), la zone de lecture gauche (A) peut être adaptée pour recevoir la différence (L-R) et la zone de lecture droite (C) peut être adaptée pour recevoir la différence (R-L) pour former une image sonore stéréo.
PCT/FI2017/050105 2016-02-24 2017-02-17 Système de reproduction sonore Ceased WO2017144774A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20165142A FI20165142A (fi) 2016-02-24 2016-02-24 Äänentoistojärjestelmä
FI20165142 2016-02-24

Publications (1)

Publication Number Publication Date
WO2017144774A1 true WO2017144774A1 (fr) 2017-08-31

Family

ID=59685890

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2017/050105 Ceased WO2017144774A1 (fr) 2016-02-24 2017-02-17 Système de reproduction sonore

Country Status (2)

Country Link
FI (1) FI20165142A (fr)
WO (1) WO2017144774A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI35014A (fi) * 1962-12-13 1965-05-10 Äänentoistojärjestelmä
US3849600A (en) * 1972-10-13 1974-11-19 Sony Corp Stereophonic signal reproducing apparatus
US4998283A (en) * 1987-12-21 1991-03-05 Matsushita Electric Industrial Co., Ltd. Screen device
JPH0334391U (fr) * 1989-08-08 1991-04-04
WO1997009853A2 (fr) * 1995-09-02 1997-03-13 New Transducers Limited Of Stonehill Ecrans de presentation comprenant des haut-parleurs
US5796854A (en) * 1997-03-04 1998-08-18 Compaq Computer Corp. Thin film speaker apparatus for use in a thin film video monitor device
JP2000236595A (ja) * 1999-02-12 2000-08-29 Oosenteikku:Kk パネル型スピーカ
JP2003125475A (ja) * 2001-10-16 2003-04-25 Jamco Corp フラットスピーカー
KR20060034414A (ko) * 2004-10-19 2006-04-24 삼성전자주식회사 오디오출력패널 및 그 오디오출력패널을 갖는디스플레이장치

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI35014A (fi) * 1962-12-13 1965-05-10 Äänentoistojärjestelmä
US3849600A (en) * 1972-10-13 1974-11-19 Sony Corp Stereophonic signal reproducing apparatus
US4998283A (en) * 1987-12-21 1991-03-05 Matsushita Electric Industrial Co., Ltd. Screen device
JPH0334391U (fr) * 1989-08-08 1991-04-04
WO1997009853A2 (fr) * 1995-09-02 1997-03-13 New Transducers Limited Of Stonehill Ecrans de presentation comprenant des haut-parleurs
US5796854A (en) * 1997-03-04 1998-08-18 Compaq Computer Corp. Thin film speaker apparatus for use in a thin film video monitor device
JP2000236595A (ja) * 1999-02-12 2000-08-29 Oosenteikku:Kk パネル型スピーカ
JP2003125475A (ja) * 2001-10-16 2003-04-25 Jamco Corp フラットスピーカー
KR20060034414A (ko) * 2004-10-19 2006-04-24 삼성전자주식회사 오디오출력패널 및 그 오디오출력패널을 갖는디스플레이장치

Also Published As

Publication number Publication date
FI20165142A7 (fi) 2017-08-25
FI20165142A (fi) 2017-08-25

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