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EP0040739A1 - Dispositif pour la reproduction par écouteurs d'un enregistrement sonore - Google Patents

Dispositif pour la reproduction par écouteurs d'un enregistrement sonore Download PDF

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Publication number
EP0040739A1
EP0040739A1 EP81103539A EP81103539A EP0040739A1 EP 0040739 A1 EP0040739 A1 EP 0040739A1 EP 81103539 A EP81103539 A EP 81103539A EP 81103539 A EP81103539 A EP 81103539A EP 0040739 A1 EP0040739 A1 EP 0040739A1
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EP
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Prior art keywords
sound
pulse
reverberation
reflections
individual
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EP81103539A
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German (de)
English (en)
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EP0040739B1 (fr
Inventor
Peter Michael Dipl.-Ing. Pfleiderer
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    • 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
    • H04S1/005—For headphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S5/00—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation 
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/43—Signal processing in hearing aids to enhance the speech intelligibility
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
    • H04S2420/05—Application of the precedence or Haas effect, i.e. the effect of first wavefront, in order to improve sound-source localisation

Definitions

  • the invention relates to a method for the acoustic reproduction of a sound recording, in particular when using a headphone as a reproduction device, the sound recording being fed to the reproduction device via a reverberation generator.
  • a two-channel, stereophonic sound recording in the form of electrical impulses is supplied to stereophonic headphones by a reverberation generator.
  • the sound recording can be taken from a sound carrier such as, for example, a record or a magnetic tape, or can come from a live recording recorded directly by means of microphones, which can be transmitted by radio.
  • This method has the disadvantage that incorrect localizations are achieved in the case of runtime stereophonic recordings in the case of laterally arranged instruments, and in the case of centrally arranged instruments, imprecise localizations are caused by distributing the direct sound signal to the two channels.
  • the latter disadvantage also occurs with intensity stereophonic recordings or with mono recordings.
  • the invention is based on the object of creating a method of the type described in the introduction which achieves sound reproduction that is as clear, understandable and as spatially as possible as natural.
  • the in-head localization is to be avoided when reproducing via headphones and the reproduction is to be generally improved when loudspeakers, such as electrophosphates, which emit highly focused radiation, are used.
  • This object is achieved in that by means of the reverberation generator within a period of about 50 ms, reverberation reflections are generated at such time intervals, preferably over 2 ms, that they are still perceived by the listener as sound-intensive individual reflections, at least some of the individual reflections consisting of two by one Direct sound impulses consist of one channel of the sound carrier, of which the first is emitted via the channel (right) of the playback devices assigned to the corresponding sound carrier channel (eg right) and the second is somewhat weaker and with about 0.2 to ms, preferential travel about 0.63 ms time delay compared to the first pulse is emitted via the other channel (left) of the reproducing devices and the reverberation reflections are attenuated as a function of the audio frequency.
  • This method has the advantage that it is not based on the acoustic conditions of a loudspeaker reproduction, but rather on the acoustic conditions as a listener experiences during the original sound event, e.g. a concert in a room, where space and human head shape play a role.
  • the reverberator feeds the listener some strong individual reflections that are recognizable as such and that, due to their special composition, are perceived as arriving.
  • the relation of a lateral direction of incidence between the left and right ear of the listener must be represented in terms of time and frequency in the correct psychoacoustic context.
  • the first sound-intensive individual reflections which increase the intelligibility and in particular the speech intelligibility and clarity, in conjunction with the subsequent exponentially decaying reverberation, is a high-quality, i.e. clear, transparent and spatial sound image possible.
  • the sound-intensive individual reflections not only consist of any delayed spatial reflections, but are also composed of individual impulses for the left and right ears, which are emitted separately for the left and right channels and take into account the distance between the ears and the shape of the head.
  • the German design specification 26 38 053 and the corresponding German laid-open specification describe in detail the problem of sound reproduction and in particular the importance of an undisturbed transmission of the transient processes for clear reproduction, in particular music reproduction.
  • the individual reflections are attenuated more and more in terms of volume with increasing distance from the direct sound, the heights being able to be slightly more attenuated.
  • the two impulses forming a reverberation reflection it is particularly important not only to attenuate the total volume of the second compared to the first, but also to attenuate it in relation to the first pulse, depending on the tone frequency, with the high tone frequencies and to a lesser extent also the low frequencies, ie the bass frequencies can be damped.
  • Devices can be provided on a device for carrying out the method described above, which allow the damping of the second pulse to be set in a frequency-dependent manner in such a way that the reproduction sounds the most natural. This makes it possible to take into account differences in the shape of the head and the shape of the ear, which have shaped the individual sense of hearing of the listener. It would be conceivable to assign a device or a device for carrying out the method described above to a plurality of manually adjustable damping elements, which are either permanently installed and are designed to be switchable or detachable by means of a plug connection, in order to make the device usable for several users without the need for a new individual adaptation each time. It is then simply switched to the damping device already set for the specific user.
  • At least the first individual reflections emitted by the reverberation generator can be at least 1.5 ms apart, preferably 4 ms apart, corresponding to one channel of the sound carrier, so that the listener can actually perceive them as individual reflections.
  • the first pulse emitted by the reverberation generator is emitted at least 10 ms, preferably 10 to 25 ms and in particular approximately 15 to 20 ms after the triggering pulse from the sound carrier (direct sound pulse).
  • the individual reflections emitted in the first 50 ms can be generated in terms of chronological order and volume, as well as the apparent direction caused by the time interval between the individual pulses of the reflections, in such a way that they simulate a specifically measured reproduction space by reproducing its reverberation behavior.
  • a statistical reverberation can then be generated by the reverberation generator. It is a dense sequence of sound impulses, which are no longer perceptible as individual impulses, but as a cluster simulate the exponential decay of an oscillation excited in a room.
  • the sound-intensive individual reflections generated in the 50 ms range can each consist of two separate sound signals or pulses, which are emitted at different volumes and additional frequency-dependent attenuation via the two channels of the playback device.
  • the two sound signals have a time interval from one another which is in the range of the time delay which lies between the arrival of sound at one ear of the listener and subsequent arrival at the other ear. This time is so short that the sound signals are still perceived as a single reflection, but this reflection is perceived as directed depending on the time interval between the sound signals forming it.
  • the sound source e.g. an orchestra
  • the sound event is projected in front of the listener in terms of perceptual physiology.
  • reflections can be interspersed which come from one channel of the sound carrier, are equally strong, but are relatively quietly emitted via both channels of the playback device, that is to say mono, and appear to come from behind or above for the listener due to their low volume.
  • the reverberation generator is preferably set up in such a way that the sound-intensive individual reflections generated by it within the first 50 ms in time interval and volume resemble the reflections occurring in a specific room. The reverberation decreases approximately exponentially after the direct sound is emitted.
  • the reproduction method described above and the reverberation devices set up to carry out this method have the great advantage that not only when using completely without reflections of the recording space, as described in the main patent application P 30 17 854.2, for example only with pickups directly on the musical instrument bodies dry recorded sound recordings a spatial sound reproduction perceived as natural is achieved, but that this method can also be used to reproduce all sound recordings recorded with more or less reverberation without any disadvantages occurring. Rather, playback is optimized in every case.
  • Figure la shows the head 2 of a listener with the right ear 4 and the left ear 6 and the arrows 8, the different angles of incidence at which the direct sound is heard when playing with headphones, not shown.
  • FIG. 1b shows acoustically desirable angles of incidence of the first, individually perceived sound reflections, which are inclined at approximately 45 degrees to the viewing direction.
  • Rr and Rl represent a wave front that appears to come from the front right, with Rr directly entering the right ear and Rl representing the left ear after bending the head. Accordingly, Lr and Ll represent a wave front arriving from the left at an angle of 45 °. Another wave front of a single reflection seems to come from behind or above.
  • FIG. 1c again shows the head 2 in connection with statistical reverberation that apparently arrives from all sides, which is indicated by arrows 10.
  • FIG. 2 shows a method that specifies how a reverberant generator should be used to produce high-sounding individual reflections that the listener perceives as directed towards him.
  • an apparatus for carrying out the method is shown in highly schematic form in FIG. 2, which schematically shows the structure of a suitable reverberation generator.
  • a reverberation generator working in accordance with this method is required in order to produce as natural a reverberation as possible when playing back sound carriers with unhallowed recordings via headphones or loudspeakers with strong directional radiation.
  • a magnetic tape 204 running fast from top to bottom in the direction of arrow 202 is shown with a left audio track 206 and a right audio track 208 which forms part of a reverberator as a high-speed magnetic tape loop.
  • two recording heads 212 and 214 are arranged behind two erase heads, of which the left 212 plays the signal coming from the left sound track of the sound carrier onto the tape 204, while the right one plays the signal coming from the right sound track of the sound carrier onto the tape.
  • the diagrams 216 and 218 shown immediately to the left and to the left of the tape 204 show the volume of the impulses coming from the sound carrier over time, the signal of the left channel being shown in solid lines and the signal of the right channel in broken lines. The same representation is used for all pulses originating from the right or left sound carrier or magnetic tape channel 212 or 214. In the example shown, two equally strong pulses 220 occurring in both channels in the left channel and 222 in the right channel are assumed, for the purpose of illustration only. In addition to the diagrams 216 and 218, corresponding diagrams are shown to the outside in which the reflection pulses generated by the reverberation generator based on the input pulses described are shown.
  • the diagram for the left channel of the reproducing devices is labeled 224 and the diagram for the right channel of the reproducing devices is labeled 226.
  • a pick-up head 228 is arranged above the left sound track, which generates a signal 230 in the left output channel 232, the volume of which is somewhat in accordance with the natural reverberation is quieter than the direct playback pulse 220.
  • a second pick-up head 232 is arranged which, when passing through the recording of the direct pulse 220 into the right output channel 234, emits a pulse 236 which is somewhat weaker than that previously into the left channel forma given pulse is 230.
  • the listener first hears the stronger impulse 230 in the left ear via headphones and 0.63 ms later in the right ear the weaker impulse 236, which gives him the impression that a sound wave coming from the front left has reached him, his left ear first reached and a short time later arrived at his right ear weakened by the "head shadow".
  • a pickup head 242 is arranged above the right sound track 208, which emits a pulse 244 into the left output channel 232, the intensity of which corresponds approximately to that of the pulse 236.
  • the impulses 240 and 244 are combined in the perception of the listener to an individual reflection that apparently falls from the right front.
  • a pick-up head 246 is arranged above the right sound track and a pick-up head 248 is arranged above the left sound track, which are short-circuited and connected to the left output channel 232 and the right output channel 234 and each continuous recording in one or both tracks to pulses 250 of equal strength delivered into the two channels and 252 which are somewhat weaker in volume than all of the reverberation pulses described above. Due to their simultaneous arrival at the listener and their lower sound intensity, the listener perceives them as individual reflections coming from behind or from above.
  • a pick-up head 254 is arranged above the right sound track 208, which emits a pulse 256 into the left output channel 232 when the recording of the direct pulse 222 passes, this pulse 256 again somewhat louder or as an electrical signal somewhat stronger than the preceding pulses 250 and 252, but is quieter or weaker than the first reverberation pulse 230 in accordance with the natural drop in sound intensity.
  • a pick-up head 258 is also arranged behind the pick-up head 254 above the right-hand sound track 208, which emits a pulse 260 into the right-hand output channel 234, which is weaker than the just-coming pulse 256 is in the left channel and thus as described together with this is perceived by the listener as a strong single reflection coming from the left or left front.
  • a sound baffle head 262 is arranged above the left sound track 206 and emits a pulse 264 corresponding in intensity to the pulse 256 to the right output channel 234.
  • a pick-up head 266 is arranged behind this sound head 262, which emits a pulse 268 corresponding in intensity to the pulse 260 in the left output channel 232.
  • the latter two impulses 264 and 268 are again perceived by the listener as a single reflection, which apparently comes from the right or front right.
  • the last pulse 268 is followed at 4 ms intervals by a usual statistical reverberation, as is also produced by known reverberation devices, and that from a dense sequence of There are sound impulses that are no longer perceptible as individual reflections, but as a cluster simulates the exponential decay of an oscillation excited in a room.
  • This statistical reverberation not shown in the diagram in FIG. 2, follows line 270 in the diagrams and can be generated, for example, by a larger number of further sound heads, but also by other known time delay devices such as, for example, capacitor chains.
  • the individual reflections described with reference to FIG. 2 can of course also be generated by means of other known devices in analog or digital technology instead of by a tape 204 and tape heads.
  • the time intervals between the individual reflections generated and their intensity should reflect the reverberation conditions in a specific room E! nt Schemeen, “for which purpose the reverberation behavior in this specific room must be measured and the reverberation generator designed accordingly.
  • An average living space should preferably be used as the room to be reproduced.
  • the reverberation generator can also be designed in such a way that it can produce the reverberation corresponding to two or more different concrete rooms, as a result of which the listener can switch to the desired reproduction room, preferably choosing a room that corresponds to the room in which the listener is listening.
  • the reverberation generator should be designed in such a way that the first reverberant single reverberation reflection is emitted not less than 12 ms but preferably about 18 ms after the direct sound, so that it does not interfere with the perception of the sound generator's transients, such as musical instruments, in the direct sound.
  • the respective second pulses 236 and 244 of the individual reflections composed of two individual pulses at intervals are not only attenuated in terms of volume overall compared to the first pulse, but additionally to take into account the diffraction at the head (see FIG. 1b), especially dampened in the highs and a little bit in the bass too.
  • the coordination of the levels and the frequency-dependent damping of the direct sound, the first sound-intensive individual reflections and the reverberation to one another and the damping of the second pulse of the composite individual reflections, to take into account the human head shape ensure easy recognition of stimulus patterns stored in the human brain and determine the directional and spatial Definition of the sound event according to the real acoustic conditions.
  • two simultaneous reverberation pulses taken from the magnetic tape with a pickup head can also be emitted via the right and left output channels of the reverberation device, whereby the impression of the directional arrival of the sound is also achieved if these impulses - as described for the separate impulses - are damped differently and with different frequencies.
  • FIG. 3 shows a possible structural embodiment of the reverberation generator 203, which is already shown schematically in the middle in FIG. 2, in which in a housing 304 with a cover 306 via two rollers 308 and 310, of which one is driven by an electric motor, not shown, a magnetic tape 312 is guided with two audio tracks.
  • a pickup block 314 is fastened to the cover, at which the erase heads 210, the recording heads 212 and 214 and the removal heads 228, 232, 238, 242, 246, 248, 254, 258, 262 and 266 are successively arranged at the intervals described with reference to FIG are attached.
  • a pickup block 316 Attached to the lower housing part 304 is a pickup block 316 which interacts with the underside of the tape loop 311 and has closely spaced pickup heads which produce the statistical reverberation. In order to bring this block closer to the last removal head 266 for receiving a single reflection, the roller 310 can also be significantly smaller or a deflection edge can take its place.
  • a spring-loaded pressing mechanism 320 for pressing the tape onto the tape heads is held between the tape heads and within the tape loop 311. The electrical switching of the heads is shown in Figure 2.
  • FIG. 4 shows a modified reverberation device 402 enclosed by a broken line with a right input 404 and a left input 406 which are connected to a preamplifier (not shown) and a right output 408 and a left output 410 which are connected to an amplifier 412. to which a stereophonic headphone 418 is connected via lines 414 and 416.
  • the signals arrive at the input terminals 404 and 406 as they are picked up by the sound carrier.
  • a line R O goes from the input terminal 404 directly to the output terminal 408, with only damping elements H for the highs, B for the low and V for the volume overall in this line, which are used for adjustment in the manufacture of the device.
  • damping elements like all other similar damping devices provided in the device, can be used directions are replaced by non-adjustable damping elements each adapted to the individual lines.
  • the input 406 is connected directly to the output 410 by a line L O , which, like the output 408, is designed as a node amplifier and allows the signal to pass only in the direction of the arrow on the incoming lines. Damping devices for the volume, the treble and the bass are interposed in the line L O again.
  • a line 420 also leads from the input terminal 404 to a delay element 422 in the form of a delay line, which delays the incoming signal by 15 ms in order to generate the first individual reflection consisting of the two pulses Rr and Rl.
  • a line Rr with interposed damping elements H, B and V leads directly to the right output 408. Furthermore, the output of the timing element 422 is connected via a line 424 to a timing element 426, which causes a time delay of 0.5 ms and over the line R1 with interposed adjustment damping elements H, B and V and a hand controller 428 leads the second pulse R1 of the first individual reflection to the output 410.
  • the hand controller 428 has a manually adjustable height controller 430 and a manually adjustable bass controller 432, with which the attenuation of the treble and bass can be adjusted a little in order to adapt them to the different hearing sensations, corresponding to different head shapes of the listener.
  • the adjustment dampers H, B and V interposed in the line R1 are already set during manufacture such that the second pulse R1 is damped in the heights and somewhat in the bass compared to the first pulse Rr.
  • an adjustable comb filter can be provided, which allows a more precise adaptation to the damping that occurs when the head is bent and thus further increases the naturalness.
  • the hand controller 428 can also have several setting options for several frequency ranges.
  • a line 434 leads from the left input to a timer 436, in which the signal is delayed by 25 ms and is then output in a line L 1, which leads via damping elements to the left output 410 and supplies it with the first pulse of the second individual reflection.
  • a line 438 leads from the output of the timer 436 to a timer 440, which causes a delay of 0.5 ms.
  • a line Lr leads from its output via adjustment dampers H, B and V and a manual damping controller 442 to the right output 408.
  • the manual controller 442 has a height adjuster 442 and a depth adjuster 444, which is indicated by broken lines with the corresponding adjusting elements 430 and 432 of the manual damping regulator are connected in line R1 in order to be actuated together, since generally symmetrical head shapes can be assumed.
  • the delay of 0.5 ms causes the individual reflections to be perceived as being measured at an angle of 45 ° to the line of sight. Smaller time delays result in smaller angles of incidence and larger time delays, larger apparent angles of incidence.
  • the lines 420, 434 branching off from the outputs 404 and 406 also lead to a node amplifier 450 which is connected to a timing element 452 which has a time delay of 15 ms.
  • timing element 456 which has a time delay of 25 ms and, with the interposition of damping elements H, B and V, is connected via a line 458 to a branch point 460, from which a line 462 to the right Lead output 408 and line 464 to left output 410.
  • a line 466 branches off from the line 458 between the damping elements B and V and leads via a damping element V for the volume level overall to the node amplifiers 454 and 450 in front of and behind the timer 452.
  • This circuit consisting of the two timing elements 452 and 456 and the feedback line 466 effects that 40 ms after the arrival of the direct sound, a mono single reflection is emitted, which is perceived as coming from behind or above. Then, due to the effect of the return line 466, a further mono reflection is emitted 25 ms later and then mono reflections are emitted at ever shorter intervals, which together form the statistical reverberation.
  • the strength of the damping of the damping element V in the line 466 and the gain of the node amplifiers 450 and 454 must be coordinated with one another in such a way that the exponential decay of the reflections is brought about. Overall, all damping elements H, B and V are set so that the reverberation caused by the direct sound results in an exponential decay consisting of the individual reflections and the statistical reverberation.
  • the statistical reverberation is dampened in the treble and basses compared to the direct sound and the individual reflections, the damping increasing with increasing distance from the direct sound.
  • the attenuations occurring at the diffraction at a head in the different frequencies of e.g. from the desired direction Wavefronts incident laterally at 45 ° relative to the viewing direction can be measured in the anechoic chamber. They determine the basic setting of the damping elements in the lines Rr, Rl, Ll and Lr and the relations of the damping of the lines for the first and the second pulse of a single reflection to each other.
  • the reproduction can paradoxically sound more natural if, with the temporal sequence of the individual reflections and the onset of statistical reverberation and / or the damping relationships between the direct sound, the individual reflection and the statistical reverberation are not reproduced relationships of a given space.
  • the first reflection according to the Haas effect can be louder than the direct sound and is still not perceived or felt as direct sound, ie this first reflection does not interfere with the location of the sound event.
  • German Auslegeschrift 26 38 053 and the corresponding German Offenlegungsschrift 2638 053 describe in detail the problem of sound reproduction and in particular the importance of transient processes for clear music reproduction and form part of the disclosure of the present application.
  • the signal input to the reverberation generators described above in accordance with FIGS. 3 and 4 can be obtained from a sound carrier, e.g. a record or a magnetic tape or recorded directly in a concert using a microphone and Life e.g. be broadcast by radio.
  • a sound carrier e.g. a record or a magnetic tape or recorded directly in a concert using a microphone and Life e.g. be broadcast by radio.
  • the clarity and intelligibility, especially of speech, is improved. Since many hearing-impaired people, for example hearing-impaired people, have great communication problems with the known hearing aids or hearing aids, the method described can also be used with particular advantage with hearing aids and a corresponding reverberation generator can be interposed between the microphone and a pair of preferably two-ear headphones.
  • the circuit according to FIG. 4 can be simplified for this application in that the setting elements H, B, V, 428 and 442 are omitted or are designed with fixed values.
  • the reverberation loop 466 can also be omitted, which eliminates the statistical reverberation. It is not so much a matter of natural reproduction as opti Male understandability of the reproduction.
  • the intelligibility is, however, also connected with the fact that the ear or the speech center in the brain is given a familiar, ie largely natural sound impression, which corresponds to the listening experience gained in the course of life.
  • the circuit, including the delay elements, can be accommodated very small on a semiconductor chip and therefore hardly enlarges the hearing aid.
  • Speech intelligibility is increased if, in contrast to the examples described above, a smaller hall is simulated by the delays in components 422, 436, 452 and 456 being approximately 10 ms shorter and approximately 5. up to 8 ms or 15 to 20 ms.
  • Hearing aids also improve the intelligibility by using the above-described method if only one earpiece is used on one ear, although the sound-intensive individual reflections can then no longer be perceived as directional and part of the room simulation is therefore lost.
  • the reverberation generators described above can be used, the mono-recorded signal being fed to both inputs and the signals from the two outputs being combined and being fed to the one playback device on or in the ear. In this case, the individual reflections still consist of two individual pulses with a short time interval.
  • the method and the corresponding device i.e. the reverberation generator, can be simplified so that each individual reflection consists of only one pulse. This also improves the intelligibility compared to conventional hearing aids.
  • the device for generating the statistical reverberation can also be omitted entirely.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)
EP81103539A 1980-05-09 1981-05-08 Dispositif pour la reproduction par écouteurs d'un enregistrement sonore Expired EP0040739B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3017854 1980-05-09
DE3017854 1980-05-09
DE3112874A DE3112874C2 (de) 1980-05-09 1981-03-31 Verfahren zur Signalaufbereitung für die Wiedergabe einer Tonaufnahme über Kopfhörer und Vorrichtung zur Durchführung des Verfahrens
DE3112874 1981-03-31

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Publication Number Publication Date
EP0040739A1 true EP0040739A1 (fr) 1981-12-02
EP0040739B1 EP0040739B1 (fr) 1987-08-26

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EP (1) EP0040739B1 (fr)
DE (2) DE3112874C2 (fr)

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WO1991001616A3 (fr) * 1989-07-25 1991-03-21 Florian Meinhard Koenig Systeme pour la localisation en avant de phases auditives generees par un casque stereo
EP1976332A3 (fr) * 2007-03-29 2015-02-25 Siemens Audiologische Technik GmbH Procédé et dispositif pour la reproduction de signaux synthétiques générés par un système auditif binaural

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EP0349599B2 (fr) * 1987-05-11 1995-12-06 Jay Management Trust Prothese auditive paradoxale
AT394650B (de) * 1988-10-24 1992-05-25 Akg Akustische Kino Geraete Elektroakustische anordnung zur wiedergabe stereophoner binauraler audiosignale ueber kopfhoerer
DE69533973T2 (de) * 1994-02-04 2005-06-09 Matsushita Electric Industrial Co., Ltd., Kadoma Schallfeldkontrollegerät und Kontrolleverfahren
US5638343A (en) * 1995-07-13 1997-06-10 Sony Corporation Method and apparatus for re-recording multi-track sound recordings for dual-channel playbacK
JP2731751B2 (ja) * 1995-07-17 1998-03-25 有限会社井藤電機鉄工所 ヘッドホン装置
US5619582A (en) * 1996-01-16 1997-04-08 Oltman; Randy Enhanced concert audio process utilizing a synchronized headgear system
US6009179A (en) * 1997-01-24 1999-12-28 Sony Corporation Method and apparatus for electronically embedding directional cues in two channels of sound
US5798922A (en) * 1997-01-24 1998-08-25 Sony Corporation Method and apparatus for electronically embedding directional cues in two channels of sound for interactive applications
US6067361A (en) * 1997-07-16 2000-05-23 Sony Corporation Method and apparatus for two channels of sound having directional cues
JP3657120B2 (ja) * 1998-07-30 2005-06-08 株式会社アーニス・サウンド・テクノロジーズ 左，右両耳用のオーディオ信号を音像定位させるための処理方法
JP2022524103A (ja) 2019-03-08 2022-04-27 メビオン・メディカル・システムズ・インコーポレーテッド カラム別の放射線の照射およびそのための治療計画の生成

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FR2316826A1 (fr) * 1975-07-01 1977-01-28 Matsushita Electric Industrial Co Ltd Adaptateur de casque pour l'ecoute d'appareils electro-acoustiques
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WO1991001616A3 (fr) * 1989-07-25 1991-03-21 Florian Meinhard Koenig Systeme pour la localisation en avant de phases auditives generees par un casque stereo
EP1976332A3 (fr) * 2007-03-29 2015-02-25 Siemens Audiologische Technik GmbH Procédé et dispositif pour la reproduction de signaux synthétiques générés par un système auditif binaural
US10104480B2 (en) 2007-03-29 2018-10-16 Sivantos Gmbh Method and facility for reproducing synthetically generated signals by means of a binaural hearing system

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US4589128A (en) 1986-05-13
EP0040739B1 (fr) 1987-08-26
DE3112874A1 (de) 1982-02-18
DE3176396D1 (en) 1987-10-01
DE3112874C2 (de) 1983-12-15

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