EP0847224A1 - Device for detecting sound sources and method for operating the same - Google Patents

Device for detecting sound sources and method for operating the same Download PDF

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Publication number
EP0847224A1
EP0847224A1 EP96810846A EP96810846A EP0847224A1 EP 0847224 A1 EP0847224 A1 EP 0847224A1 EP 96810846 A EP96810846 A EP 96810846A EP 96810846 A EP96810846 A EP 96810846A EP 0847224 A1 EP0847224 A1 EP 0847224A1
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EP
European Patent Office
Prior art keywords
microphones
signals
sound
sound sources
microphone
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Withdrawn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
EP96810846A
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German (de)
French (fr)
Inventor
Cyrill Steinebrunner
Hans Rudolf Dr. Graf
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.)
Sulzer Markets and Technology AG
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Sulzer Innotec AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sulzer Innotec AG filed Critical Sulzer Innotec AG
Priority to EP96810846A priority Critical patent/EP0847224A1/en
Publication of EP0847224A1 publication Critical patent/EP0847224A1/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
    • H04R2201/403—Linear arrays of transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
    • H04R2201/405—Non-uniform arrays of transducers or a plurality of uniform arrays with different transducer spacing

Definitions

  • the invention relates to a device for detection according to the position and sound power of sound sources the preamble of claim 1 and a method for Operation of the device.
  • This device has the disadvantage that the redundancy of the Information occurs in the microphone signals.
  • the invention has for its object a device to determine the position and sound power of Improve sound sources, so that Disadvantage is fixed.
  • a method for operating the device is by Features of claim 7 characterized.
  • the carrying device 1 contains a stand 7 and a support 8 for the Microphones, the carrier being arranged horizontally.
  • the recording device 3 is e.g. one in itself Known multi-track tape recorder, which with the microphones 2nd is connected to all the signals of each microphone to record on one audio track at a time.
  • the Recording device is with the evaluation device connected, e.g. is a personal computer.
  • the Microphones 2 are in a predetermined pattern arranged.
  • Fig. 2 occur in the sound of four Microphones A, B, C, D, in a division with Equidistant distances are arranged at an angle incident sound wave on redundant microphone signals.
  • 3 shows according to the invention a reduced number of microphones, i.e. three microphones A, B, D provided, in which by Public address with angled sound wave none redundant micro signals occur.
  • the microphones A, B, D For scanning the sound power of the sound sources 11, 12 four microphones 2 are provided, the microphones A, B, D with a smaller division for the higher Frequency range and the microphones A ', B', D 'with a greater division for the low frequency range are provided.
  • a first division i.e. the distance is e.g. eight Centimeters assumed for a frequency range.
  • the a is an even multiple of the first division, i.e. of the Distance is e.g. twenty-four centimeters. With this assignment is achieved that only four Microphones are sufficient for two audio frequency ranges generate redundancy-free microphone signals.
  • the microphones are sound sources in a predetermined Distance from the object that the Has sound sources and the microphones with the Multitrack tape recorder connected in such a way that the signals of a each microphone recorded on a sound track becomes. Then the sound waves generated microphone signals recorded.
  • the evaluation is carried out separately from the record.
  • To evaluate the microphone signals is a grid is assigned to the object.
  • For each Raster point is the sound propagation at most existing sound sources for each microphone separately inverted and thereby aligned to the grid point generates first evaluation signals.
  • the first evaluation signals then become with each other and with themselves multiplied where generated by second evaluation signals will. It becomes the time average of the second Evaluation signals determined that the sound power of Represents sound source in the grid point. Before education the time average becomes the second Evaluation signals multiplied by factors from the Arrangement of the microphones depending on the carrying device are.
  • the position sensor is in Positioned to a temporal assignment of the To enable object and the microphone signals.
  • the Grid with the object having sound sources thus moves.
  • the inversion of the Sound propagation performed depending on the time.
  • the device has a number of microphones 2, which are arranged according to a predetermined pattern an essentially redundancy-free storage of Microphone signals in a recording device cause.

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  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • General Health & Medical Sciences (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

Abstract

The device has a carrier (1) with a number of microphones (2) mounted according to a scale with equal intervals, a recording device (3) connected to the microphone so as to transfer signals and tuned to record all signals from a microphone separately and an evaluation device for determining the position and acoustic power of the sound sources. A reduced number of microphones is arranged on the carrier according to a defined pattern whilst maintaining the scale separations to effect an essentially redundancy free storage of microphone signals in the recording device.

Description

Die Erfindung betrifft eine Vorrichtung zum Feststellen der Position und Schallleistung von Schallquellen gemäss dem Oberbegriff des Anspruches 1 und ein Verfahren zum Betrieb der Vorrichtung.The invention relates to a device for detection according to the position and sound power of sound sources the preamble of claim 1 and a method for Operation of the device.

Es ist bekannt, dass mit einer Anordnung von Mikrofonen Schallquellen an ortsfesten und bewegten Einrichtung feststellbar sind. Hierzu sind eine Mehrzahl von Mikrofone entlang einer Geraden angeordnet, die sich vertikal und/oder horizontal erstrecken. Die Mikrofone sind in äquidistanten Abständen angeordnet und mit einer Aufzeichnungseinrichtung signalübertragend verbunden.It is known that with an arrangement of microphones Sound sources on stationary and moving equipment are noticeable. There are a number of Microphones arranged along a straight line that extends extend vertically and / or horizontally. The microphones are arranged at equidistant intervals and with a Recording device connected to transmit signals.

Diese Vorrichtung hat den Nachteil, dass Redundanz der Informationen in den Mikrofonsignalen auftritt.This device has the disadvantage that the redundancy of the Information occurs in the microphone signals.

Der Erfindung liegt die Aufgabe zugrunde eine Vorrichtung zum Feststellen der Position und Schallleistung von Schallquellen zu verbessern, so dass der genannte Nachteil behoben ist.The invention has for its object a device to determine the position and sound power of Improve sound sources, so that Disadvantage is fixed.

Diese Aufgabe wird mit den kennzeichnenden Merkmalen des Anspruches 1 gelöst. This task is carried out with the characteristic features of the Claim 1 solved.

Ein Verfahren zum Betrieb der Vorrichtung ist durch die Merkmale des Anspruches 7 gekennzeichnet.A method for operating the device is by Features of claim 7 characterized.

Die mit der Erfindung erzielbaren Vorteile sind darin zu sehen, dass einerseits der Aufwand, insbesondere an Mikrofonen geringer ist und andererseits das Ergebnis der Feststellung mindestens gleich oder besser als bei bekannten Ausführungsformen ist.The advantages that can be achieved with the invention are included therein see that on the one hand the effort, in particular Microphones is lower and on the other hand the result of Find at least equal to or better than at known embodiments.

Nachfolgend wird die Erfindung anhand der beiliegenden Zeichnungen erläutert.The invention is described below with reference to the enclosed Drawings explained.

Es zeigen:

Fig. 1
Eine Ausführungsform einer erfindungsgemässen Vorrichtung in schematischer Darstellung;
Fig. 2
eine Anordnung von Mikrofonen und die erzeugten Mikrofonsignale;
Fig. 3
eine Ausführungsform einer erfindungsgemässen Anordnung von Mikrofonen und die erzeugten Mikrofonsignale und
Fig. 4
eine zweite Ausführungsform einer Anordnung von Mikrofonsignalen.
Show it:
Fig. 1
An embodiment of a device according to the invention in a schematic representation;
Fig. 2
an arrangement of microphones and the generated microphone signals;
Fig. 3
an embodiment of an inventive arrangement of microphones and the generated microphone signals and
Fig. 4
a second embodiment of an arrangement of microphone signals.

Wie die Fig. 1 zeigt, weist die hier in Rede stehende Vorrichtung eine Trageinrichtung 1, vier Mikrofone 2, eine Aufzeichnungseinrichtung 3, eine Auswerteinrichtung 4 und einen Positionssensor 5 auf. Die Tragvorrichtung 1 enthält einen Ständer 7 und einen Träger 8 für die Mikrofone, wobei der Träger horizontal angeordnet ist. Die Aufzeichnungseinrichtung 3 ist z.B. ein an sich bekanntes Mehrspurtonbandgerät, das mit den Mikrofonen 2 verbunden ist, um sämtliche Signale eines jeden Mikrofons auf jeweils einer Tonspur aufzuzeichnen. Die Aufzeichnungseinrichtung ist mit der Auswerteinrichtung verbunden, die z.B. ein Personalcomputer ist. Die Mikrofone 2 sind nach einem vorbestimmten Muster angeordnet.1 shows, the one in question here Device a carrying device 1, four microphones 2, a recording device 3, an evaluation device 4 and a position sensor 5. The carrying device 1 contains a stand 7 and a support 8 for the Microphones, the carrier being arranged horizontally. The recording device 3 is e.g. one in itself Known multi-track tape recorder, which with the microphones 2nd is connected to all the signals of each microphone to record on one audio track at a time. The Recording device is with the evaluation device connected, e.g. is a personal computer. The Microphones 2 are in a predetermined pattern arranged.

Wie die Fig. 2 zeigt treten bei der Beschallung von vier Mikrofonen A, B, C, D, die in einer Teilung mit äquidistanten Abständen angeordnet sind mit schräg einfallender Schallwelle redundante Mikrofonsignale auf.As shown in Fig. 2 occur in the sound of four Microphones A, B, C, D, in a division with Equidistant distances are arranged at an angle incident sound wave on redundant microphone signals.

Nachfolgend wird die Funktion der Vorrichtung anhand der Fig. 3 und 4 erläutert. Wie die Fig. 3 zeigt, werden erfindungsgemäss eine reduzierte Anzahl von Mikrofone, d.h. drei Mikrofone A, B, D vorgesehen, bei welchen durch Beschallung mit schräg einfallender Schallwelle keine redundanten Mikrosignale auftreten.The function of the device is described below with reference to 3 and 4 explained. 3 shows according to the invention a reduced number of microphones, i.e. three microphones A, B, D provided, in which by Public address with angled sound wave none redundant micro signals occur.

Wie die Fig. 4 zeigt, werden die Position und Schallleistung von zwei punktförmigen Schallquellen 11 und 12 festgestellt, wobei sich die Frequenzen der Schallquelle 11, 12 über zwei Tonfrequenzbereichen erstrecken.As shown in Fig. 4, the position and Sound power from two point sound sources 11 and 12 found, the frequencies of the Sound source 11, 12 over two tone frequency ranges extend.

Zur Abtastung der Schallleistung der Schallquellen 11, 12 werden vier Mikrofone 2 vorgesehen, wobei die Mikrofone A, B, D mit einer kleineren Teilung für den höheren Frequenzbereich und die Mikrofone A', B', D' mit einer grösseren Teilung für den niedrigen Frequenzbereich vorgesehen sind. Bei der Zuordnung der Mikrofone wird von einer ersten Teilung, d.h. der Abstand beträgt z.B. acht Zentimeter für einen Frequenzbereich ausgegangen. Für einen anderen Frequenzbereich werden die Mikrofone mit einer zweiten Teilung einander zugeordnet, die ein geradzahliges Vielfaches der ersten Teilung ist, d.h. der Abstand beträgt z.B. vierundzwanzig Zentimeter. Mit dieser Zuordnung wird erreicht, dass lediglich vier Mikrofone ausreichen, um für zwei Tonfrequenzbereiche jeweils redundanzfreie Mikrofonsignale zu generieren.For scanning the sound power of the sound sources 11, 12 four microphones 2 are provided, the microphones A, B, D with a smaller division for the higher Frequency range and the microphones A ', B', D 'with a greater division for the low frequency range are provided. When assigning the microphones, a first division, i.e. the distance is e.g. eight Centimeters assumed for a frequency range. For the microphones use a different frequency range a second division assigned to each other, the a is an even multiple of the first division, i.e. of the Distance is e.g. twenty-four centimeters. With this assignment is achieved that only four Microphones are sufficient for two audio frequency ranges generate redundancy-free microphone signals.

Zur Feststellung der Position und Schallleistung von Schallquellen werden die Mikrofone in einem vorbestimmten Abstand von dem Gegenstand aufgestellt, welcher die Schallquellen aufweist und die Mikrofone mit dem Mehrspurtonbandgerät so verbunden, dass die Signale eines jeden Mikrofons auf jeweils einer Tonspur aufgezeichnet wird. Anschliessend werden die durch die Schallwellen generierten Mikrofonsignale aufgezeichnet.To determine the position and sound power of The microphones are sound sources in a predetermined Distance from the object that the Has sound sources and the microphones with the Multitrack tape recorder connected in such a way that the signals of a each microphone recorded on a sound track becomes. Then the sound waves generated microphone signals recorded.

Im Regelfall erfolgt die Auswertung örtlich getrennt von der Aufzeichnung. Zur Auswertung der Mikrofonsignale wird dem Gegenstand ein Raster zugeordnet. Für jeden Rasterpunkt wird die Schallausbreitung der allenfalls vorhandenen Schallquellen für jedes Mikrofon getrennt invertiert und dadurch auf den Rasterpunkt ausgerichtete erste Auswertsignale erzeugt. Die ersten Auswertsignale werden dann miteinander und mit sich selber multipliziert, wo durch zweite Auswertsignale erzeugt werden. Es wird der zeitliche Mittelwert der zweiten Auswertsignale ermittelt, der die Schallleistung der Schallquelle im Rasterpunkt darstellt. Vor der Bildung des zeitlichen Mittelwertes werden die zweiten Auswertsignale mit Faktoren multipliziert, die von der Anordnung der Mikrofone an der Tragvorrichtung abhängig sind.As a rule, the evaluation is carried out separately from the record. To evaluate the microphone signals is a grid is assigned to the object. For each Raster point is the sound propagation at most existing sound sources for each microphone separately inverted and thereby aligned to the grid point generates first evaluation signals. The first evaluation signals then become with each other and with themselves multiplied where generated by second evaluation signals will. It becomes the time average of the second Evaluation signals determined that the sound power of Represents sound source in the grid point. Before education the time average becomes the second Evaluation signals multiplied by factors from the Arrangement of the microphones depending on the carrying device are.

Für bewegte Gegenstände wird der Positionssensor in Stellung gebracht, um eine zeitliche Zuordnung des Gegenstandes und der Mikrofonsignale zu ermöglichen. Das Raster mit dem Schallquellen aufweisenden Gegenstand bewegt sich somit. In diesem Fall wird die Inversion der Schallausbreitung in Abhängigkeit der Zeit durchgeführt.For moving objects, the position sensor is in Positioned to a temporal assignment of the To enable object and the microphone signals. The Grid with the object having sound sources thus moves. In this case, the inversion of the Sound propagation performed depending on the time.

Die Vorrichtung weist eine Anzahl von Mikrofonen 2 auf, die nach einem vorbestimmten Muster angeordnet sind, um eine im wesentlichen redundanzfreie Speicherung von Mikrofonsignalen in einer Aufzeichnungseinrichtung zu bewirken.The device has a number of microphones 2, which are arranged according to a predetermined pattern an essentially redundancy-free storage of Microphone signals in a recording device cause.

Mit der reduzierten Anzahl von Mikrofonen wird das Ergebnis der Feststellung mindestens gleich oder besser als mit einer Anordnung, die an sämtlichen Punkten der Teilung mit einem Mikrofon versehen ist.With the reduced number of microphones, that becomes Result of the determination at least equal or better than with an arrangement that at all points of the Division is provided with a microphone.

Claims (8)

Vorrichtung zum Feststellen der Position und Schallleistung von Schallquellen, mit einer Trageinrichtung, mit einer Anzahl von Mikrofonen, die basierend auf einer Teilung mit gleichen Abständen an der Trageinrichtung angeordnet sind, mit einer Aufzeichnungseinrichtung, die mit den Mikrofonen signalübertragend verbunden und dazu bestimmt ist, sämtliche Signale von jedem Mikrofon separat aufzuzeichnen und mit einer Auswerteinrichtung, um die Position und Schallleistung der Schallquellen zu bestimmen, dadurch gekennzeichnet, dass eine reduzierte Anzahl von Mikrofonen (2) unter Beibehaltung der Teilung nach einem vorbestimmten Muster an der Trageinrichtung (1) angeordnet sind, um eine im wesentlichen redundanzfreie Speicherung von Mikrofonsignalen in der Aufzeichnungseinrichtung (3) zu bewirken.Device for determining the position and Sound power from sound sources, with a Support device, with a number of microphones that based on an equally spaced division the support device are arranged with a Recording device using the microphones is connected to transmit signals and is intended all signals from each microphone separately record and with an evaluation device to the position and sound power of the sound sources determine, characterized in that a reduced number of microphones (2) under Maintaining the division after a predetermined one Patterns are arranged on the support device (1) an essentially redundancy-free storage of Microphone signals in the recording device (3) to effect. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Mikrofone (2) in einer ersten und/oder zweiten Teilung an der Trageinrichtung (1) angeordnet sind, um Schallquellen mit unterschiedlichem Tonfrequenzbereich zu ermitteln.Device according to claim 1, characterized in that the microphones (2) in a first and / or second division arranged on the support device (1) are to sound sources with different To determine the audio frequency range. Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Mikrofone (2) jeweils auf einer Linie angeordnet sind, die horizontal und/oder vertikal verläuft um ortsfeste oder bewegliche Schallquellen festzustellen. Device according to one of claims 1 or 2, characterized in that the microphones (2) are each arranged on a line that runs horizontally and / or vertically around stationary or detect movable sound sources. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Mikrofone (2) in einer Fläche liegend angeordnet sind.Device according to one of claims 1 to 3, characterized characterized in that the microphones (2) in a Are arranged horizontally. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Tragvorrichtung (1) lagestabil oder schwenkbar ist.Device according to one of claims 1 to 4, characterized characterized in that the carrying device (1) is stable or pivotable. Vorrichtung nach einem der Ansprüche 1 bis 5, gekennzeichnet durch einen Positionssensor (5), der mit der Aufzeichnungseinrichtung (3) verbunden ist.Device according to one of claims 1 to 5, characterized by a position sensor (5) which is connected to the recording device (3). Verfahren zum Betrieb der Vorrichtung nach einem der Ansprüche 1 bis 6, gekennzeichnet durch die Schritte Aufstellen der Mikrofone in einem vorbestimmten Abstand von einem Schallquellen aufweisenden Gegenstand; Aufzeichnen sämtlicher Signale von jedem Mikrofon; Auswerten der Mikrofonsignale, wobei ein Raster dem Gegenstand zugeordnet wird, wobei für jeden Rasterpunkt die Schallausbreitung der allenfalls vorhandenen Schallquellen für jedes Mikrofon getrennt invertiert wird, so dass auf den Rasterpunkt ausgerichtete erste Auswertsignale erzeugt werden, wobei die ersten Auswertsignale miteinander und mit sich selbst multipliziert werden, so dass zweite Auswertsignale erzeugt werden, wobei der zeitliche Mittelwert der zweiten Auswertsignale ermittelt wird, welcher die Schallleistung der Schallquelle im Rasterpunkt darstellt und wobei die zweiten Auswertsignale vor Bildung des zeitlichen Mittelwertes mit vom Mittelwertes mit vom vorbestimmten Muster abhängigen Faktoren multipliziert werden. Method for operating the device according to one of claims 1 to 6, characterized by the steps Placing the microphones at a predetermined distance from an object having sound sources; Record all signals from each microphone; Evaluation of the microphone signals, a grid being assigned to the object, the sound propagation of any sound sources for each microphone being inverted separately for each grid point, so that first evaluation signals aligned with the grid point are generated, the first evaluation signals multiplying with one another and with themselves are so that second evaluation signals are generated, the temporal average of the second evaluation signals being determined, which represents the sound power of the sound source in the raster point, and wherein the second evaluation signals are multiplied by factors dependent on the predetermined pattern before the formation of the temporal mean. Verfahren nach Anspruch 7, wobei sich das Raster mit dem Schallquellen aufweisenden Gegenstand bewegt, dadurch gekennzeichnet, dass die Inversion der Schallausbreitung in Abhängigkeit der Zeit vorgenommen wird.The method of claim 7, wherein the grid with moved the object containing sound sources, characterized in that the inversion of the Sound propagation as a function of time is made.
EP96810846A 1996-12-04 1996-12-04 Device for detecting sound sources and method for operating the same Withdrawn EP0847224A1 (en)

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Application Number Priority Date Filing Date Title
EP96810846A EP0847224A1 (en) 1996-12-04 1996-12-04 Device for detecting sound sources and method for operating the same

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Application Number Priority Date Filing Date Title
EP96810846A EP0847224A1 (en) 1996-12-04 1996-12-04 Device for detecting sound sources and method for operating the same

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0996310A1 (en) * 1998-10-19 2000-04-26 Sulzer Innotec Ag Method for determining the position and the intensity of sound sources

Citations (5)

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Publication number Priority date Publication date Assignee Title
JPS61256269A (en) * 1985-05-10 1986-11-13 Oki Electric Ind Co Ltd Underwater signal detector
DE3420545A1 (en) * 1984-06-01 1990-12-06 Krupp Atlas Elektronik Gmbh Sound source bearing determination appts. - uses passive sonar device with small receiver
EP0414264A2 (en) * 1989-08-25 1991-02-27 Sony Corporation Virtual microphone apparatus and method
WO1994026075A1 (en) * 1993-05-03 1994-11-10 The University Of British Columbia Tracking platform system
EP0684485A1 (en) * 1994-05-27 1995-11-29 METRAVIB R.D.S. Société Anonyme Method and system to localize a firearm using an acoustic detection

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3420545A1 (en) * 1984-06-01 1990-12-06 Krupp Atlas Elektronik Gmbh Sound source bearing determination appts. - uses passive sonar device with small receiver
JPS61256269A (en) * 1985-05-10 1986-11-13 Oki Electric Ind Co Ltd Underwater signal detector
EP0414264A2 (en) * 1989-08-25 1991-02-27 Sony Corporation Virtual microphone apparatus and method
WO1994026075A1 (en) * 1993-05-03 1994-11-10 The University Of British Columbia Tracking platform system
EP0684485A1 (en) * 1994-05-27 1995-11-29 METRAVIB R.D.S. Société Anonyme Method and system to localize a firearm using an acoustic detection

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
H.F.SILVERMAN & S.E.KIRTMAN: "A TWO STAGE ALGORITHM FOR DETERMINING,TALKER LOCATION FROM LINEAR MICROPHONE ARRAY DATA.", COMPUTER SPEECH & LANGUAGE, vol. 6, no. 2, April 1992 (1992-04-01), LONDON GB, pages 129 - 152, XP000266326 *
PATENT ABSTRACTS OF JAPAN vol. 11, no. 107 (P - 563) 4 April 1987 (1987-04-04) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0996310A1 (en) * 1998-10-19 2000-04-26 Sulzer Innotec Ag Method for determining the position and the intensity of sound sources

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