EP2138997A2 - Procédé et système de réduction de perturbations acoustiques - Google Patents

Procédé et système de réduction de perturbations acoustiques Download PDF

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Publication number
EP2138997A2
EP2138997A2 EP09163696A EP09163696A EP2138997A2 EP 2138997 A2 EP2138997 A2 EP 2138997A2 EP 09163696 A EP09163696 A EP 09163696A EP 09163696 A EP09163696 A EP 09163696A EP 2138997 A2 EP2138997 A2 EP 2138997A2
Authority
EP
European Patent Office
Prior art keywords
signal
masking signal
acoustic
masking
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Withdrawn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
EP09163696A
Other languages
German (de)
English (en)
Other versions
EP2138997A3 (fr
Inventor
Sandra Beecken
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.)
Zumtobel Lighting GmbH Austria
Original Assignee
Zumtobel Lighting GmbH Austria
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 Zumtobel Lighting GmbH Austria filed Critical Zumtobel Lighting GmbH Austria
Publication of EP2138997A2 publication Critical patent/EP2138997A2/fr
Publication of EP2138997A3 publication Critical patent/EP2138997A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/80—Jamming or countermeasure characterized by its function
    • H04K3/82—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection
    • H04K3/825—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection by jamming
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/1752—Masking
    • G10K11/1754—Speech masking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/41—Jamming having variable characteristics characterized by the control of the jamming activation or deactivation time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/45—Jamming having variable characteristics characterized by including monitoring of the target or target signal, e.g. in reactive jammers or follower jammers for example by means of an alternation of jamming phases and monitoring phases, called "look-through mode"
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/78—Detection of presence or absence of voice signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K2203/00—Jamming of communication; Countermeasures
    • H04K2203/10—Jamming or countermeasure used for a particular application
    • H04K2203/12—Jamming or countermeasure used for a particular application for acoustic communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/028—Casings; Cabinets ; Supports therefor; Mountings therein associated with devices performing functions other than acoustics, e.g. electric candles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R27/00—Public address systems

Definitions

  • the present invention relates to a method for reducing acoustic interference, especially in larger rooms or open-plan offices. Furthermore, the present invention relates to a system for carrying out a corresponding method.
  • the present invention is therefore based on the object to provide an improved solution, with the help of an acoustic interference within a room be reduced more effectively and accordingly the attention for work can be increased.
  • the solution according to the invention is based on the idea of analyzing the incoming sound which is to be masked and finally of selectively masking only those frequency sub-ranges which affect the intelligibility of human speech. If it is determined in the analysis that the sound signals originating from the environment contain speech, a masking signal is output to reduce or mask the sound signals so as to prevent a user of the system from being distracted by understanding speech. On the other hand, in the case that the sound signals originating from the environment are not due to speech, the output of the masking signal is suppressed so as not to increase the noise load additionally.
  • a system for the selective reduction of acoustic interference which comprises means for acoustically detecting a sound signal present in a target area, means for emitting an acoustic masking signal in the target area and a control unit for controlling the means for emitting the acoustic masking signal, that with the aid of the masking signal within the target area an acoustic interference is reduced or masked, wherein according to the invention the control unit is adapted to analyze the detected sound signal for the presence of speech signals, and wherein the masking signal is emitted only when by the control unit the presence of speech signals has been detected.
  • the invention proposes a method for reducing acoustic interference, comprising the following steps: detecting a sound signal present in a target area and emitting an acoustic masking signal into the target area such that an acoustic interference is reduced or masked within the target area, wherein according to the invention the detected Sound signal is analyzed for the presence of speech signals and wherein the masking signal is emitted only when the presence of speech signals has been detected.
  • the means for outputting the masking signal comprise, in particular, a loudspeaker, preferably a directional loudspeaker, which is then aligned in such a way that it directs the masking signal used for masking exclusively to the user of the system so that surrounding people and conversations are not disturbed.
  • control unit can be designed to recognize different languages, wherein the masking signal is emitted only upon detection of one or more predetermined languages.
  • an acoustic signal has a disruptive effect, in particular, if it is a language that is understood by the user of the system.
  • the system may be adjustable in this manner by the user and may also be calibratable in order to make it possible to choose the deflection threshold differently from person to person.
  • the system can be switched on and off individually depending on requirements and current activity.
  • the masking system is integrated in the lighting.
  • provision can be made, in particular, for the delivery of the masking signal to be dependent on the operating state of an associated luminaire or associated illumination device. So it would be conceivable to control the lighting depending on the acoustics via the control of the system. For example. it would be conceivable to integrate the system according to the invention in recessed, pendant, floor or table lamps.
  • Fig. 1 In general, the situation is presented in a large office, in which several workstations 50 1 , 50 2 and 50 3 are provided, on which people work. In this case, act on a person located at a workplace a variety of sound signals, which negatively affect the concentration and thus the ability to work.
  • the acoustic signals may, for example, come from devices that are located within the room and are used. This may, for example, be PC's, printers or copying machines.
  • other acoustic disturbances may also include speech signals as shown. This is, for example, the case when talking on a neighboring workstation or talking to several people. In particular, these speech signals - if they are understood - to the fact that the ability to concentrate drops sharply.
  • the system represented generally by reference numeral 1 serves to reduce or mask the acoustic stress.
  • the burden for a person located at the second workstation 50 2 is to be reduced.
  • Sound signals S originating from the environment are first detected and analyzed by the system 1 according to the invention.
  • an acoustic masking signal G is emitted then directed to the workstation 50 2 , with the help of which originating from the environment sound signals S are masked.
  • the particular feature of this active system 1 for sound masking consists in the fact that it is specially designed for suppressing or masking disturbing sound signals which are based on speech. This will be explained in more detail below with reference to Fig. 2 which illustrates the individual components of the system 1 according to the invention.
  • the individual components can in this case, for example, be arranged compactly within a housing 2.
  • microphones 3 are initially provided, with the aid of which incoming sound signals S are detected from the surroundings. Since the masking of interfering sound signals is to take place independently of which direction they originate, it is preferably provided that a plurality of microphones 3 are arranged distributed over the circumference of the housing 2.
  • the sound signals S determined in this case are then forwarded to a control unit 4, shown schematically, which evaluates these signals and, as a consequence thereof, a loudspeaker 5 controls.
  • a masking signal G in the form of a masking sound which is intended to at least reduce the interference caused by the surrounding sound signals, is then emitted via the loudspeaker 5 onto the workstation. Since this requires that the masking signal G is emitted directed to the person located at the workplace, the speaker 5 is preferably configured so adjustable that it can be aligned in a suitable manner depending on the situation.
  • the control unit 4 accordingly analyzes the incoming sound as to whether it contains speech.
  • the control unit 4 may have a processor with a corresponding calculation algorithm, which makes it possible to distinguish the incoming sound signals on the one hand in conventional ambient sound and on the other hand in speech.
  • the loudspeaker 5 is driven accordingly to output the masking signal G.
  • a marking of those frequency subregions takes place which makes the intelligibility of speech.
  • the control unit 4 determines that sound signals originating from the environment are due only to devices or other sound sources which do not result in this particular impairment of the ability to concentrate, the output of the masking signal is suppressed. In this way it is avoided that the person in the workplace is additionally impaired by the sound signals of the system in their attention. Thus, the disturbances attributable to speech are deliberately suppressed.
  • the attributable to speech signals impairment of the ability to concentrate is different levels, it is preferably the ability to customize the operation of the system according to the invention or to calibrate.
  • the user can, for example, select different languages by which he feels particularly disturbed and which accordingly should be suppressed on detection by the system 1. If, on the other hand, languages are involved which the user does not understand anyway, the outputting of the masking signal can again be suppressed.
  • the deflection threshold may vary from person to person, which is why the threshold of the sound level, below which the output of the masking signal is suppressed, can again be set individually by the user.
  • the intelligent system 1 according to the invention is preferably used, generally an artificial lighting is required, it is preferably provided to integrate the system 1 in lights or lighting devices.
  • lights or lighting devices For example, it would be as shown in FIG Fig. 3 possible to integrate the system 1 in a recessed or surface-mounted luminaire 60, a pendant luminaire 61, a floor lamp 62 or a table lamp 63.
  • the combination with other lighting equipment or systems, for example, light bands or the like. would of course be conceivable. It can be provided that the lighting is regulated depending on the sound situation.
  • Fig. 4 shows finally another preferred embodiment of the system according to the invention 1.
  • This application is based on the fact that nowadays to regulate the climate of a room so-called cooling ceilings are used or the calculation of the ceiling and floor mass flows into the heat calculation of a building.
  • cooling ceilings are used or the calculation of the ceiling and floor mass flows into the heat calculation of a building.
  • suspended acoustic ceilings is no longer possible.
  • a missing acoustic ceiling in offices leads to unwanted and unsatisfactory so-called reverberation of the room and an increased sound level, there increasingly reflections of sound on the ceiling 45 occur, such as Fig. 5a shows.
  • An active masking as is carried out by the system 1 according to the invention, often does not lead to a satisfactory solution, since a sufficient reduction of the sound level and the reverberation time can not be achieved.
  • the use of additional sound-absorbing elements is indispensable in such a case.
  • FIG Fig. 4 particularly preferably provided that the inventive system 1 is used in combination with such vertical Schallabsorbtions instituten 40.
  • the system 1 can be arranged in particular on the underside of such elements 40, wherein in turn preferably an integration in a lamp or a lighting device is provided.
  • an integration in a lamp or a lighting device is provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Noise Elimination (AREA)
EP09163696.9A 2008-06-26 2009-06-25 Procédé et système de réduction de perturbations acoustiques Withdrawn EP2138997A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008030354 2008-06-26
DE102008035181A DE102008035181A1 (de) 2008-06-26 2008-07-29 Verfahren und System zur Reduzierung akustischer Störungen

Publications (2)

Publication Number Publication Date
EP2138997A2 true EP2138997A2 (fr) 2009-12-30
EP2138997A3 EP2138997A3 (fr) 2017-07-26

Family

ID=41165188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09163696.9A Withdrawn EP2138997A3 (fr) 2008-06-26 2009-06-25 Procédé et système de réduction de perturbations acoustiques

Country Status (2)

Country Link
EP (1) EP2138997A3 (fr)
DE (1) DE102008035181A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011051727A1 (de) * 2011-07-11 2013-01-17 Pinta Acoustic Gmbh Verfahren und Vorrichtung zur aktiven Schallmaskierung

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3879578A (en) * 1973-06-18 1975-04-22 Theodore Wildi Sound masking method and system
JPS552115A (en) 1978-06-16 1980-01-09 Sukeo Tsurumi Automatic*manual opening*closing machine
GB2138994B (en) * 1983-10-14 1985-06-19 Miller Herman Inc Sound generating apparatus
US20030048910A1 (en) * 2001-09-10 2003-03-13 Roy Kenneth P. Sound masking system
US7143028B2 (en) * 2002-07-24 2006-11-28 Applied Minds, Inc. Method and system for masking speech
DE102004031657B4 (de) * 2004-06-30 2017-08-24 Volkswagen Ag Verfahren zum Unterdrücken von Geräuschen in einem Fahrzeuginnenraum
US20060109983A1 (en) * 2004-11-19 2006-05-25 Young Randall K Signal masking and method thereof
US7376557B2 (en) * 2005-01-10 2008-05-20 Herman Miller, Inc. Method and apparatus of overlapping and summing speech for an output that disrupts speech
DE102006049543A1 (de) * 2006-06-13 2007-12-20 Volkswagen Ag Lautsprecheranordnung zur gerichteten Beschallung eines Kraftfahrzeugsitzes
US8107639B2 (en) * 2006-06-29 2012-01-31 777388 Ontario Limited System and method for a sound masking system for networked workstations or offices

Also Published As

Publication number Publication date
EP2138997A3 (fr) 2017-07-26
DE102008035181A1 (de) 2009-12-31

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