EP1280377A1 - Lautsprecheranordnung und Signalprozessor zur Stereotonwiedergabe für ein Fahrzeug und ein diese Anordnung enthaltendes Fahrzeug - Google Patents

Lautsprecheranordnung und Signalprozessor zur Stereotonwiedergabe für ein Fahrzeug und ein diese Anordnung enthaltendes Fahrzeug Download PDF

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Publication number
EP1280377A1
EP1280377A1 EP01118369A EP01118369A EP1280377A1 EP 1280377 A1 EP1280377 A1 EP 1280377A1 EP 01118369 A EP01118369 A EP 01118369A EP 01118369 A EP01118369 A EP 01118369A EP 1280377 A1 EP1280377 A1 EP 1280377A1
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EP
European Patent Office
Prior art keywords
speaker
vehicle
frequency
low
stereo sound
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Withdrawn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
EP01118369A
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English (en)
French (fr)
Inventor
Kyung Lak Lee
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.)
A& D Engineering Co Ltd
A&D Engineering Co Ltd
Original Assignee
A& D Engineering Co Ltd
A&D Engineering Co Ltd
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.)
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Publication date
Application filed by A& D Engineering Co Ltd, A&D Engineering Co Ltd filed Critical A& D Engineering Co Ltd
Priority to EP01118369A priority Critical patent/EP1280377A1/de
Publication of EP1280377A1 publication Critical patent/EP1280377A1/de
Withdrawn legal-status Critical Current

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00Stereophonic arrangements
    • H04R5/02Spatial or constructional arrangements of loudspeakers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04SSTEREOPHONIC SYSTEMS 
    • H04S1/00Two-channel systems
    • H04S1/002Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04SSTEREOPHONIC SYSTEMS 
    • H04S7/00Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30Control circuits for electronic adaptation of the sound field
    • H04S7/305Electronic adaptation of stereophonic audio signals to reverberation of the listening space
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2205/00Details of stereophonic arrangements covered by H04R5/00 but not provided for in any of its subgroups
    • H04R2205/024Positioning of loudspeaker enclosures for spatial sound reproduction
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10General applications
    • H04R2499/13Acoustic transducers and sound field adaptation in vehicles
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04SSTEREOPHONIC SYSTEMS 
    • H04S7/00Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30Control circuits for electronic adaptation of the sound field
    • H04S7/307Frequency adjustment, e.g. tone control

Definitions

  • the present invention relates to a speaker configuration and a signal processor for stereo sound reproduction for vehicle and a vehicle having the same, in particular, which can provide all of the passengers with left-right balanced stereo sound in a vehicle.
  • FIG. 1A and 1B show arrangements for stereo sound listening environment using a stereo speaker set.
  • the listener who is in a sweet spot region may feel as if a sound source 13 is positioned at a center point between speakers 11 and 12. If one of the speakers 11 and 12 is closer to a listener's position that is out of sweet spot, the sound source 13 will be felt as biased thereto as shown in FIG 1B. Therefore, a listener positioned at the same distance from the stereo speakers 11 and 12 can feel left-right balanced stereo sound on the line connecting between the speakers.
  • the balanced stereo sound can be heard to only one(s) positioned at a vertex of an isoceles triangle opposed to the base of the triangle or along the line equidistant from the two speakers 11 and 12 (sweet spot region), and other listeners feel the sound biased toward a speaker nearer to them.
  • FIG. 2 shows an arrangement for stereo sound reproduction using a multi-channel speaker set of the prior art in a car.
  • a driver and passengers are not positioned in the center even if a number of speakers (6 to 11) are provided. Therefore, the listeners cannot feel the balanced stereo sound since they are not positioned at the equidistant point from left and right speakers. Also, stereo signals are generated for optimal reproduction through the right and left speakers which are arranged at ⁇ 30° from the front direction of the listener, whereas the current speaker arrangement of the car audio as in FIG. 2 simultaneously reproduces these stereo signals through front and rear speakers in left and right sides which are asymmetrically arranged to all of the listeners so that nobody can feel the balanced stereo sound which can be felt in FIG. 1A. Therefore, there is a problem that no listeners in the car can be provided with the balanced stereo sound since such a speaker arrangement of the car audio of the prior art simultaneously reproduces the stereo sounds from the front and rear sides to all of the listeners who are not in the center position.
  • FIG. 3A and FIG. 3B are conceptual views of signal delay for providing a stereo sound to one person in a deluxe car of the prior art.
  • the concept of signal delay is implemented to provide the stereo sound to only one person such as a driver or an honored passenger.
  • all speakers are required to be equally distanced from the listener. Therefore, a circle is drawn with the listener as the center and the distance to the farthest speaker as the radius, and then input signals from all speakers nearer to the listeners than the farthest speaker are delayed so that the input signals can be recognized as generated from virtual positions on the circumference of the circle.
  • this technology is restricted for only one listener since delay values cannot be determined for more than one listener.
  • the indoor sound listening environment of the vehicle is very inferior in the aspects of reverberation time and frequency characteristics since sound absorption materials such as a sheet, reflecting materials such as a window and various accessories are arranged in a limited space different from a general auditorium. Therefore, a reverberation signal processing is essential to improve such an environment.
  • the sounds from front speakers are necessarily added with early reflections generated from the nearby walls of stage and the sounds from rear speakers are necessarily added with a later reverberations generated from the rearward walls of the hall.
  • the current sound reproduction system of the car audio of the prior art is added with the same reverberation signal for all speaker channels.
  • the present invention has been proposed to solve the foregoing problems of the prior art and it is therefore an object of the present invention to provide a left-right balanced stereo sound to all passengers in a vehicle.
  • a speaker configuration for stereo sound reproduction in a vehicle which has a plurality of speakers installed therein, the speaker configuration comprising: a first speaker provided in the left of a front central part of the vehicle for feeding a right channel output; and a second speaker provided in the right of the front central part of the vehicle for feeding a left channel output.
  • the first speaker and the speaker are arranged at the height within ⁇ 50cm from the hight of the speakers previously installed in the vehicle.
  • each of the first and second speakers is a full-range speaker for reproducing both of low-frequency and high-frequency sounds.
  • each of the first and second speakers is a two-way speaker that is separated into a low-frequency speaker and a high-frequency speaker.
  • each of the first and second speakers is a coaxial speaker that is separated into a low-frequency speaker and a high-frequency speaker, which are coaxially bound.
  • each of the first and second speakers is a high-frequency speaker (tweeter).
  • the first speaker is oriented toward a left side of front seat in the vehicle
  • the second speaker is oriented toward a right side of front seat in the vehicle.
  • a signal processor for stereo sound reproduction in a vehicle which has a plurality of speakers and a head unit with built-in amplifiers (hereinafter will be referred to as powered head unit) installed therein, in use for a speaker configuration including a first speaker provided in the left of a front central part of the vehicle for feeding a right channel output and a second speaker provided in the right of the front central part of the vehicle for feeding a left channel output
  • the signal processor comprising: an equalizer for compensating the frequency characteristics of a front left channel output and a front right channel output supplied from the powered head unit according to the front speaker configuration in the vehicle and the vehicle type; and a terminal for distributing the left channel outputs as many as the front speakers for the left side and distributing the right channel outputs as many as the front speakers for the right.
  • the signal processor for stereo sound reproduction according to the ninth aspect of the invention further comprises a low-frequency pass filter for passing low-frequency components of a rear left channel output and a rear right channel output supplied from the powered head unit while performing a heavy damping in frequency bands beyond the range of the low-frequency components and outputting the left channel sound via the rear speaker for the left side and outputting the right channel sound via the rear speaker for the right side.
  • the low-frequency pass filter passes low-frequency components in the range of 80 to 1000Hz while performing a heavy damping in frequency bands beyond the low-frequency range.
  • a signal processor for stereo sound reproduction in a vehicle which has a plurality of speakers and a head unit without power amplifier (hereinafter will be referred to as non-powered head unit) installed therein, for a speaker configuration including a first speaker provided in the left of a front central part of the vehicle for feeding a right channel signal; and a second speaker provided in the right of the front central part of the vehicle for feeding a left channel signal
  • the signal processor comprising: an early reflection sound processing unit for adding early reflections on a front left channel signal and a front right channel signal inputted from the non-powered head unit; an equalizer for compensating the tone of output signals from the early reflection sound processing unit according to the front speaker configuration in the vehicle and the vehicle type; and a first volume controller for controlling the volume of output signals from the equalizer, and distributing the left channel signal as many as the front speakers for the left side and distributing the right channel signal as many as the front speakers for the right side to feed the respective signals to amplifiers
  • the early reflection processing unit adds 0 to 20 number of early reflections.
  • the signal processor for stereo sound reproduction further comprises a first delay unit for delaying the left channel signal and the right channel signal inputted from the non-powered head unit for a certain period of time to remove the localization of a rear sound image; a later reverberation processing unit for adding later reflections to the output signals of the first delay unit; a first low-frequency pass filter for passing low frequency components of the signals reverberated from the later reverberation processing unit while performing a heavy damping in frequency bands beyond the range of the low-frequency components; and a second volume controller for controlling the volume of the output signals from the first low-frequency pass filter to feed the respective signals to amplifiers for rear speakers.
  • the first delay unit delays the signals for a time period of 0 to 10 milliseconds.
  • the later reverberation processing unit adds the later reverberations for 0 to 3 seconds.
  • the first low-frequency pass filter passes the low-frequency components in the range of 80 to 1000Hz while performing a heavy damping in frequency bands beyond the low-frequency range.
  • the signal processor for stereo sound reproduction further comprises a second delay unit for delaying a combined signal of the left channel signal and the right channel signal from the non-powered head unit to remove the localization of the rear sound image; a second low-frequency pass filter for passing low-frequency components of an output signal from the second delay unit while performing a heavy damping in frequency bands beyond the range of the low-frequency components; and a third volume controller for controlling the volume of an output signal from the second low-frequency pass filter to feed the signal to a sub-woofer amplifier.
  • the second delay unit delays the combined signal for a time period of 0 to 10 milliseconds.
  • the second low-frequency pass filter passes low-frequency components in the range the same as or lower than 80Hz while performing a heavy damping in frequency bands beyond the low-frequency range.
  • a vehicle having a dashboard installed with a plurality of speakers comprising: a first speaker installed in a central left part of the dashboard of the vehicle for feeding a right channel output; and a second speaker installed in a central right part of the dashboard of the vehicle for feeding a left channel output.
  • FIG. 4A is a conceptual view for showing the indoor sound reproduction
  • FIG. 4B illustrates earlier reflections and later reverberations.
  • front speakers in a front part of a vehicle are to be applied with the early reflections which are actually generated from the nearby walls of stage and rear speakers in a rear part of the vehicle are to be applied with the later reverberations which are actually generated from the rearward wall of the hall. Then passengers in the vehicle can feel the sound as if they are listening in a hall.
  • FIG. 5 shows a speaker configuration for vehicle according to the first embodiment of the invention.
  • the first left speaker 21 is installed in a front left part of a vehicle
  • the second right speaker 24 is installed in a front right part of the vehicle.
  • the first left speaker 21 and the second right speaker 24 are previously arranged in a vehicle.
  • the first right speaker 22 and the second left speaker 23 are additionally installed in a front central part of the vehicle at the same height as the previously arranged speakers such as the first left speaker 21 and the second right speaker 24.
  • the first right speaker 22 and the second left speaker 23 are full-range speakers.
  • each of the speakers 21, 22, 23 and 24 is installed with a predetermined orientation, in which the first left speaker 21 and the first right speaker 22 are oriented toward the left side of rear seat and the second left speaker 23 and the second right speaker 24 are oriented toward the right side of rear seat.
  • the first left speaker 21 and the second left speaker 23 receive a left channel output L which is added with the earlier reflections
  • the first right speaker 22 and the second right speaker 24 receive a right channel output R added with the earlier reflections. Therefore, each of the passengers receives the right and left stereo sounds at the same time since a set of the first right speaker 22 and the second left speaker 23 are installed in the front central part.
  • the first rear speaker 25 and the second rear speaker 26 are previously arranged in the vehicle, and adapted to enhance front stereo stage effect.
  • the first rear speaker 25 and the second rear speaker 26 are used as woofers.
  • the first rear speaker 25 is installed behind the left rear seat, and the second rear speaker 26 is installed behind the right rear seat.
  • Delay units are used to delay sound signals before being inputted into the first rear speaker 25 and the second rear speaker 26 so that the first and second rear speakers 25 and 26 output the delayed left and right stereo signals to prevent side effect that a rear sound image is localized.
  • the later reverberations are added and a low-pass filtering and a reverberation processing are carried out for the output via the first and second rear speakers 25 and 26. Then, dynamic bass sound is reproduced to provide the surround feelings as that can be felt in the theater.
  • the first embodiment provides a left-right balanced stereo sound to all of the passengers, i.e, the first embodiment can overcome the problem about stereo sound reproduction according to the speaker arrangement for vehicle of the prior art as in FIG. 2 and fundamentally solve lack of the stage-like stereophonic feeling due to the speaker arrangement and signal processing for vehicle of the prior art.
  • FIG. 6 shows a speaker configuration for vehicle according to the second embodiment of the invention.
  • the second embodiment is the same as the first embodiment in the basic concept except for using a two-way type speaker separated into a high-frequency speaker and a low-frequency speaker or a coaxial speaker separated into a high-frequency speaker and a low-frequency speaker which are manufactured as coaxially bound.
  • the first low-frequency speaker 31a and the first left high-frequency speaker 31b are installed in a front left part of a vehicle, and the second right low-frequency speaker 34a and the second right high-frequency speaker 34b are installed in a front right part of the vehicle.
  • the first left low-frequency speaker 31a, the first left high-frequency speaker 31b, the second right low-frequency speaker 34a and the second right high-frequency speaker 34b are previously arranged in the vehicle.
  • first right low-frequency speaker 32a, the first right high-frequency speaker 32b, the second left low-frequency speaker 33a and the second left high-frequency speaker 33b are additionally installed in a front central part of the vehicle.
  • the first right low-frequency speaker 32a and the second left low-frequency speaker 33a are respectively installed at the same height as some of the previously arranged speakers such as the first low-frequency speaker 31a and the second right frequency speaker 34a
  • the first right high-frequency speaker 32b and the second left high-frequency speaker 33b are respectively installed at the same height as the other previously arranged speakers such as the first left high-frequency speaker 31b and the and the second right high-frequency speaker 34b.
  • the first right low-frequency speaker 32a and the first right high-frequency speaker 32b constitute a two-way type speaker separated into a low-frequency speaker and a high-frequency speaker or a coaxial speaker separated into the high-frequency speaker and the lower frequency speaker manufactured as bound.
  • the second left low-frequency speaker 33a and the second left high-frequency speaker 33b compose the two-way type speaker separated into the low-frequency speaker and the high-frequency speaker or the coaxial speaker separated into the high-frequency speaker and the lower frequency speaker manufactured as bound.
  • Each of the speakers 31a, 31b, 32a, 32b, 33a, 33b, 34a and 34b is adopted to have a predetermined orientation, in which the first left low-frequency speaker 31a, the first left high-frequency speaker 31b, the first right low-frequency speaker 32a and the first right high-frequency speaker 32b are oriented toward the left side of rear seat, and the second left low-frequency speaker 33a, the second left high-frequency speaker 33b, the second right low-frequency speaker 34a and the second right high-frequency speaker 34b are oriented toward the right side of rear seat.
  • the first left low-frequency speaker 31a, the first left high-frequency speaker 31b, the second left low-frequency speaker 33a and the second left high-frequency speaker 33b receive a left channel output L added with the earlier reflections
  • the first right low-frequency speaker 32a, the first right high-frequency speaker 32b, the second right low-frequency speaker 34a and the second right high-frequency speaker 34b receive a right channel output R added with the earlier reflections. Since a set of the first right low-frequency speaker 32a, the first right high-frequency speaker 32b, the second left low-frequency speaker 33a and the second left high-frequency speaker 33b are installed in the front central part, each of the passengers receives the left-right balanced stereo sound at the same time.
  • the first rear speaker 35, the second rear speaker 36 and a sub-woofer 37 are previously arranged in the vehicle, and adapted to enhance front stereo stage effect.
  • the first rear speaker 35 and the second rear speaker 36 are used as woofers and the rear speaker 37 are used as the sub-woofer.
  • the first rear speaker 35 is installed behind the left rear seat in the vehicle.
  • the second rear speaker 36 is installed behind the right rear seat in the vehicle.
  • the sub-woofer 37 is installed behind the middle rear seat in the vehicle.
  • sound signals are delayed via delay unit before being inputted into the first rear speaker 35, the second rear speaker 36 and the sub-woofer 37 so that the first rear speaker 35, the second rear speaker 36 and the sub-woofer 37 output the delayed left and right stereo sound signals to prevent side effect that a rear sound image is localized.
  • the later reverberations are added and a low-pass filtering and a reverberation signal processing are carried out for the outputs to the first and second rear speakers 35 and 36 and a low-pass filtering carried out for the output to the sub-woofer 37. Then, dynamic bass sound is reproduced to provide the surround feelings as can be felt in the theater.
  • the second embodiment provides a left-right balanced stereo sound to all of the passengers, i.e, the second embodiment can overcome the problem about stereo sound reproduction according to the speaker arrangement for vehicle of the prior art as in FIG. 2 and fundamentally solve lack of the stage-like stereophonic feeling due to the speaker arrangement and signal processing for vehicle of the prior art.
  • FIG. 7 shows a speaker arrangement for vehicle according to the third embodiment of the invention.
  • the third embodiment is the same as the second embodiment in the basic concept except for that only high-frequency speakers or tweeters 42 and 43 are used in a front central part of a vehicle on the basis that the human being uses a high-frequency band for finding an direction of sound.
  • the first low-frequency speaker 41a and the first high-frequency speaker 41b are installed in a front left part of the vehicle, and the second right low-frequency speaker 44a and the second right high-frequency speaker 44b are installed in a front right part of the vehicle.
  • the first left low-frequency speaker 41a, the first left high-frequency speaker 41b, the second right low-frequency speaker 44a and the second right high-frequency speaker 44b are previously arranged in the vehicle.
  • the first right tweeter 42 and the second left tweeter 43 are additionally installed in the front central part, and at the same height as the previously arranged speakers such as the first left high-frequency speaker 41b and the second right high-frequency speaker 44b. Both of the first right tweeter 42 and the second left tweeter 43 are high-frequency speakers for enhancing the orientation.
  • Each of the speakers 41a, 41b, 42, 43, 44a and 44b is installed to have a predetermined orientation, in which the first left low-frequency speaker 41a and the first left high-frequency speaker 41b are oriented toward the left side of rear seat, and the first right tweeter 42 is oriented toward the left side of front seat, and the second left tweeter 43 is oriented toward the right side of front seat, and the second low-frequency speaker 44a and the second right high-frequency speaker 44b are oriented toward the right side of rear seat.
  • the first left low-frequency speaker 41a, the first left high-frequency speaker 41b and the second left tweeter 43 receive a left channel output added with the earlier reflections
  • the first right tweeter 42, the second right low-frequency speaker 44a and the second right high-frequency speaker 44b receive a right channel output R added with the earlier reflections. Since a set of the first right tweeter 42 and the second left tweeter 43 are installed in the front central part, each of the passengers receives the left-right balanced stereo sound at the same time.
  • the first rear speaker 45 and the second rear speaker 46 are previously arranged in the vehicle, and adopted to enhance front stereo stage effect.
  • the first rear speaker 45 and the second rear speaker 46 are used as woofers.
  • the first rear speaker 45 is installed behind the left rear seat in the vehicle.
  • the second rear speaker 46 is installed behind the right rear seat in the vehicle. Sound signals are delayed via delay unit before being inputted into the first rear speaker 45 and the second rear speaker 46 so that the first and second rear speakers 45 and 46 output the delayed left and right stereo signals to prevent side effect that a rear sound image is localized.
  • the later reverberations are added and a low-pass filtering and a reverberation signal processing are carried out for the outputs to the first and second rear speakers 45 and 46, and a low-pass filtering carried out for the output to the sub-woofer 37. Then, dynamic bass sound is reproduced to provide the surround feelings as can be felt in the theater.
  • the third embodiment provides a left-right balanced stereo sound to all of the passengers, i.e, the third embodiment can overcome the problem about stereo sound reproduction according to the speaker arrangement for vehicle of the prior art as in FIG. 2 and fundamentally solve lack of the stage-like stereophonic feeling due to the speaker arrangement and signal processing for vehicle of the prior art.
  • FIG. 8 shows a block diagram of a signal processor for vehicle according to the fourth embodiment of the invention.
  • the fourth embodiment is about the signal processor for providing a balanced stereo sound to all of the passengers.
  • the signal processor is made of a passive device which receives, as an input, a large output signal amplified in an amplifier of a powered head unit.
  • An equalizer 51 respectively receives a front left channel output LF and a front right channel output RF of the powered head unit to compensate the frequency characteristics according to the configuration of front speakers and vehicle type.
  • the compensated outputs are fed to the front speakers after being separated into a left channel output LL of left side passenger, a right channel output LR of left side passenger, a left channel output RL of right side passenger and a right channel output RR of right side passenger.
  • the left channel output LL of left side passenger and the left channel output RL of right side passenger are the same ones
  • the right channel output LR of left side passenger and the right channel output RR of right side passenger are the same ones.
  • a low-frequency pass filter 53 respectively receives a rear left output LB and a rear right output RB of the powered head unit, and then passes low-frequency components in the range of 80 to 1000Hz while performing a heavy damping in frequency bands beyond the low-frequency range to reproduce dynamic bass sound.
  • the outputs compensated like this are volume controlled in the second volume controller 54, and fed to rear speakers respectively.
  • FIG. 9 shows a block diagram of a signal processor for vehicle according to the fifth embodiment of the invention.
  • the fifth embodiment is about the signal processor for vehicle for providing a left-right balanced stereo sound to all of the passengers.
  • the signal processor is made of an active device for receiving a signal of a non-powered head unit.
  • an earlier reflection processing unit 61 receives a left channel signal L and a right channel signal R and processes the signals to add 0 to 20 number of earlier reflections. Description about the earlier reflections and the later reverberation will be omitted in this embodiment since they were explained in reference to FIG. 4A and Fig 4B.
  • the equalizer 62 respectively receives the left channel signal and the right channel signal, which are processed with the earlier reflections, and compensates the tone according to the configuration of front speakers and the vehicle type.
  • the signals compensated like this are volume controlled, and fed to a front amplifier 71 after being separated into a left channel signal LL of left side passenger, a right channel signal LR of left side passenger, a left channel signal RL of right side passenger and a right channel signal RR of right side passenger.
  • the left channel signal LL of left side passenger and the left channel signal RL of right side passenger are the same signals
  • the left channel signal RL of right side passenger and the right channel signal RR of right side passenger are the same signals.
  • the first delay unit 64 respectively receives the left channel signal L and the right channel signal R, and delays the signals for 0 to 10milliseconds to remove the localization of the rear sound image.
  • a later reverberation processing unit 65 receives the delayed signals, and reverberates by adding later reverberations for 0 to 3 seconds to provide the surround sound which can be felt in the theater.
  • the first low-frequency pass filter 66 respectively receives the reverberated left and right signals, and passes low-frequency components in the range of 80 to 1000Hz while performing a heavy damping in frequency bands beyond the low-frequency range to reproduce dynamic bass sound.
  • the signals compensated like this are volume controlled in the second volume controller 67 and fed to a rear amplifier 72 after being separated into a rear left channel signal BL and a rear right channel signal BR.
  • the second delay unit 68 receives a mono signal which is a combined signal of the left channel signal L and the right channel signal R, and delays the signal for a certain period of time ranging 0 to 10milliseconds to remove the localization of the rear sound image.
  • the second low-frequency pass filter 69 receives an output signal of the second delay unit 68, and passes low-frequency components in the range of the same as or lower than 80Hz while performing a heavy damping in frequency bands beyond this range. Then, low-frequency is passed and high-frequency is damped for dynamic sub-woofer reproduction.
  • the signal which is low-frequency processed like this is volume controlled in the third volume controller 70, and then fed to a sub-woofer amplifier 73.
  • FIG. 10 shows a general view in which a varied example of the first embodiment and the fifth embodiment of the invention are combined.
  • the varied first embodiment with a woofer being installed thereto is combined with the fifth embodiment. Description of each block has already made above, so explanation thereof will be omitted.
  • one of the first embodiment, the second embodiment, the third embodiment and a preferable variation thereof can be arbitrarily combined with one of the fourth embodiment, the fifth embodiment and a preferable variation thereof to constitute a stereo sound reproduction system for the whole vehicle.
  • the front speakers in the first, second and third embodiments can be provided as integrally mounted to a dashboard which will be installed in the vehicle later.
  • the first speaker is installed in a central left part of the dashboard to receive a right channel output
  • the second speaker is installed in a central right part of the dashboard to receive a left channel output.
  • the present invention can provide all of the passengers with the balanced stereo sound which has not been able to be obtained in the vehicle of the prior art, in which the set of additional speakers are mounted while making the best of the previously arranged speakers to enable easy installation with low cost.
  • the fourth embodiment utilizes the head unit and the previously arranged speakers so that the embodiment can be performed with minimum cost and effort.
  • the signal processor of the fourth or fifth embodiment can be installed into the head unit if designed as a single chip or module. If the speaker configuration proposed in the invention is applied at a designing stage of vehicle, a vehicle can be manufactured which provides the left-right balanced stereo sound for all passengers. According to the invention, the left and right speakers are placed at the same distance from each of the passengers to provide a correct stereo sound stage.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Stereophonic System (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
EP01118369A 2001-07-27 2001-07-27 Lautsprecheranordnung und Signalprozessor zur Stereotonwiedergabe für ein Fahrzeug und ein diese Anordnung enthaltendes Fahrzeug Withdrawn EP1280377A1 (de)

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EP01118369A EP1280377A1 (de) 2001-07-27 2001-07-27 Lautsprecheranordnung und Signalprozessor zur Stereotonwiedergabe für ein Fahrzeug und ein diese Anordnung enthaltendes Fahrzeug

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EP01118369A EP1280377A1 (de) 2001-07-27 2001-07-27 Lautsprecheranordnung und Signalprozessor zur Stereotonwiedergabe für ein Fahrzeug und ein diese Anordnung enthaltendes Fahrzeug

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1509064A2 (de) * 2003-08-18 2005-02-23 Pioneer Corporation Verfahren zur Montage und zum Antrieb der Lautsprechern
EP1558060A2 (de) * 2004-01-13 2005-07-27 Bose Corporation Raumklangbetriebsarten in einem Fahrzeug-Audiosystem
US8483413B2 (en) 2007-05-04 2013-07-09 Bose Corporation System and method for directionally radiating sound
CN107743713A (zh) * 2015-03-27 2018-02-27 弗劳恩霍夫应用研究促进协会 处理用于在汽车中再现的立体声信号以通过前置扬声器实现单独的三维声音的装置和方法
CN114286276A (zh) * 2021-12-22 2022-04-05 北京罗克维尔斯科技有限公司 车辆声场控制方法和装置、电子设备及电动车辆
WO2023052555A3 (de) * 2021-09-30 2023-05-25 Kaetel Systems Gmbh Lautsprechersystem, ansteuerschaltung für ein lautsprechersystem mit einem hochtöner und zwei mittel- oder tieftönern und enstprechende verfahren

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4897877A (en) * 1987-05-18 1990-01-30 Oxford Speaker Company Sub-woofer driver combination with dual voice coil arrangement
US4953219A (en) * 1987-06-26 1990-08-28 Nissan Motor Company Limited Stereo signal reproducing system using reverb unit
JPH02241296A (ja) * 1989-03-15 1990-09-25 Matsushita Electric Ind Co Ltd カーオーディオ装置
US5119420A (en) * 1989-11-29 1992-06-02 Pioneer Electronic Corporation Device for correcting a sound field in a narrow space
US5305386A (en) * 1990-10-15 1994-04-19 Fujitsu Ten Limited Apparatus for expanding and controlling sound fields
EP0756437A2 (de) * 1995-07-28 1997-01-29 Srs Labs, Inc. Gerät zur akustischen Korrektur
EP1056310A2 (de) * 1999-05-27 2000-11-29 Fujitsu Ten Limited Audiosystem in einem Kraftfahrzeug
EP1104221A2 (de) * 1999-11-25 2001-05-30 Harman Audio Electronic Systems GmbH Beschallungseinrichtung

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4897877A (en) * 1987-05-18 1990-01-30 Oxford Speaker Company Sub-woofer driver combination with dual voice coil arrangement
US4953219A (en) * 1987-06-26 1990-08-28 Nissan Motor Company Limited Stereo signal reproducing system using reverb unit
JPH02241296A (ja) * 1989-03-15 1990-09-25 Matsushita Electric Ind Co Ltd カーオーディオ装置
US5119420A (en) * 1989-11-29 1992-06-02 Pioneer Electronic Corporation Device for correcting a sound field in a narrow space
US5305386A (en) * 1990-10-15 1994-04-19 Fujitsu Ten Limited Apparatus for expanding and controlling sound fields
EP0756437A2 (de) * 1995-07-28 1997-01-29 Srs Labs, Inc. Gerät zur akustischen Korrektur
EP1056310A2 (de) * 1999-05-27 2000-11-29 Fujitsu Ten Limited Audiosystem in einem Kraftfahrzeug
EP1104221A2 (de) * 1999-11-25 2001-05-30 Harman Audio Electronic Systems GmbH Beschallungseinrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 560 (E - 1012) 13 December 1990 (1990-12-13) *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1509064A2 (de) * 2003-08-18 2005-02-23 Pioneer Corporation Verfahren zur Montage und zum Antrieb der Lautsprechern
EP1509064A3 (de) * 2003-08-18 2006-12-27 Pioneer Corporation Verfahren zur Montage und zum Antrieb der Lautsprechern
EP1558060A2 (de) * 2004-01-13 2005-07-27 Bose Corporation Raumklangbetriebsarten in einem Fahrzeug-Audiosystem
EP1558060A3 (de) * 2004-01-13 2006-09-20 Bose Corporation Raumklangbetriebsarten in einem Fahrzeug-Audiosystem
US7653203B2 (en) 2004-01-13 2010-01-26 Bose Corporation Vehicle audio system surround modes
US8031880B2 (en) 2004-01-13 2011-10-04 Bose Corporation Vehicle audio system surround modes
US8483413B2 (en) 2007-05-04 2013-07-09 Bose Corporation System and method for directionally radiating sound
CN107743713A (zh) * 2015-03-27 2018-02-27 弗劳恩霍夫应用研究促进协会 处理用于在汽车中再现的立体声信号以通过前置扬声器实现单独的三维声音的装置和方法
US10257634B2 (en) 2015-03-27 2019-04-09 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Apparatus and method for processing stereo signals for reproduction in cars to achieve individual three-dimensional sound by frontal loudspeakers
CN107743713B (zh) * 2015-03-27 2019-11-26 弗劳恩霍夫应用研究促进协会 处理用于在汽车中再现的立体声信号以通过前置扬声器实现单独的三维声音的装置和方法
WO2023052555A3 (de) * 2021-09-30 2023-05-25 Kaetel Systems Gmbh Lautsprechersystem, ansteuerschaltung für ein lautsprechersystem mit einem hochtöner und zwei mittel- oder tieftönern und enstprechende verfahren
CN114286276A (zh) * 2021-12-22 2022-04-05 北京罗克维尔斯科技有限公司 车辆声场控制方法和装置、电子设备及电动车辆
CN114286276B (zh) * 2021-12-22 2023-08-01 北京罗克维尔斯科技有限公司 车辆声场控制方法和装置、电子设备及电动车辆

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