WO2005073680A1 - Appareil de mesure et d'analyse de signaux sonores - Google Patents

Appareil de mesure et d'analyse de signaux sonores Download PDF

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Publication number
WO2005073680A1
WO2005073680A1 PCT/DK2005/000059 DK2005000059W WO2005073680A1 WO 2005073680 A1 WO2005073680 A1 WO 2005073680A1 DK 2005000059 W DK2005000059 W DK 2005000059W WO 2005073680 A1 WO2005073680 A1 WO 2005073680A1
Authority
WO
WIPO (PCT)
Prior art keywords
signals
microphone
analysis results
analysing
measuring
Prior art date
Application number
PCT/DK2005/000059
Other languages
English (en)
Inventor
Peter Larsen
Original Assignee
Bruel & Kjær Sound & Vibration Measurement A/S
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 Bruel & Kjær Sound & Vibration Measurement A/S filed Critical Bruel & Kjær Sound & Vibration Measurement A/S
Publication of WO2005073680A1 publication Critical patent/WO2005073680A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H3/00—Measuring characteristics of vibrations by using a detector in a fluid

Definitions

  • the invention relates to professional and scientific measurement and analysis of sound. Such measurement and analysis of sound are required e.g. to ascertain whether noise limits in environmental and occupational health standards are exceeded or not.
  • Measurements and analyses of environmental and occupational noise must meet rigorous standards. Depending on whether a noise limit is exceeded or not, the consequences thereof on the individuals that are exposed to the noise and on the noise producing party can be dramatic. It is therefore important that measurements of environmental and occupational noise are accurate and reliable.
  • US 6 035 341 discloses multimedia data analysis in intelligent video informa- tion management system, which accepts and stores input signals from several video cameras and from several microphones. Sound signals from microphones can be analysed and compared with frequency distribution templates representing predefined events, and each template is used for identifying and declaring a specific event.
  • WO 98/10246 A1 discloses a handheld portable digital geographical data manager for gathering image and other field data, however without the possibility of analysing sequences of data and storing analysis results.
  • US 2002/0181721 A1 discloses a system with a two-dimensional array of spaced microphones for locating a sound source
  • the operator of equipment for professional and scientific measurement and analysis of environmental and occupational noise has used paper to make notes and sketches of measurement locations, date and time of the day, instrument settings, and meteorological observations such as wind and its direction etc.
  • Proper and carefully made notes and sketches add to the reliability and repeatability of the measurements.
  • such notes on paper can be confused with each other, and inaccurate or incomplete notes and sketches may lead to false analyses, and wrong decisions may be made based thereupon.
  • Noise pulses to be analysed can have durations of a fraction of a second, and environmental and occupational noise measurements can be performed over a period of time, e.g. minutes, hours or days, or continuously.
  • Signals received from measuring microphones can be stored on mass storage devices such as recording tape for later analysis, or analysis, such as frequency analysis, can be performed where only the analysis results are stored, e.g. electronically or on hard copy such as paper. This requires considerably less storage capacity than storing the microphone signals, but great care by the operator is required for properly documenting and annotating the measurements. It can be difficult, or even impossible, to identify a sound event from a third-octave or harmonic analysis alone.
  • the problem to be solved by the invention is thus to provide an apparatus for measuring and analysing sound signals, where the measurement and analysis results are well documented with no risk of confusion, so that only correct decisions are made based on the measurement and analysis results from the apparatus.
  • the invention solves this problem by providing an apparatus that has new possibilities of annotating the measurement and analysis results concurrently with the measurement and registration of the sound signals.
  • the apparatus has, in addition to the measuring microphone that receives the sound signals to be analysed, an annotation microphone for receiving e.g. voice signals from an operator.
  • an annotation microphone for receiving e.g. voice signals from an operator.
  • the operator may also choose to use the annotation microphone pick up an audio sequence of the sound signal that is being analysed and store the audio sequence together with the analysis results. This will greatly assist the operator in identifying events subsequently.
  • the operator's voiced comments should not disturb the measurement and analysis of the sound signals to be measured.
  • Either one of the measurement microphone and the annotation microphone can be placed remotely from the measuring and analysing apparatus, and the signals from the remote microphone can be transmitted to the apparatus via an extension cable or via a wireless connection.
  • a remote annotation microphone can be of the bone conduction type for placing e.g. in the bottom of the tragus of the outer ear of a human being, where it picks up bone conducted speech from the operator. The operator then has both hands free for other purposes.
  • the operator can wear hearing protectors with cups covering the ears, whereby the surrounding sound is correspondingly attenuated before it reaches the annotation microphone, which only picks up the operator's bone conducted speech signals.
  • Transmission of the operator's voice signals to the measuring appa- ratus can take place over a wireless connection such as a Bluetooth link.
  • the analysis results require much less storage capacity than the original or compressed sound signals.
  • the apparatus stores the analysis results and not the sound signals, whereby the required storage capacity is reduced.
  • the original sound can then no longer be recreated, and it can be difficult to identify a sound event or a sound source based only on the analysis results.
  • the ' operator can initiate such recording manually, or it can be made automati- cally based on certain events.
  • reviewing the stored analysis results stored samples of the analysed sound can greatly assist in identifying the sound source or event that created the sound.
  • the apparatus of the invention preferably has a camera that can take still pictures and video sequences and is used for taking pictures of e.g. the measuring location and of events relating thereto.
  • the user can make selected pictures showing the measuring location and of objects such as buildings that can influence the measurements, or of selected sequences of the measuring session.
  • the apparatus can be programmed to take pictures at certain conditions such as the sound level exceeding a preset threshold or triggered by the operator.
  • Such still pictures and video sequences are stored in the storage together with the corresponding sound signals or analysis results. The user thus has a powerful tool for documenting the measurements and the events that caused them.
  • the apparatus of the invention can have other means of annotating the measurements that contribute to the documentation of the measurements.
  • Such means include a clock, a camera for making photographic recordings, a system for identifying the geographical location, and a pressure sensitive screen. Further details and their advantages will become apparent from the following detailed description of the invention. Detailed description of the invention
  • the figure illustrates schematically an apparatus 10 according to the invention for measuring and analysing sound signals.
  • a measuring microphone M1 receives sound signals to be analysed and outputs electrical signals repre- senting the received sound signals.
  • the measuring microphone M1 is connected to a preamplifier 11 that has as its main task to amplify and condition the output signal from the microphone and feed the amplified signals to the apparatus 10.
  • the measuring microphone M1 is preferably a condenser microphone, which is known to have excellent performance and very high out- put impedance. If appropriate and as shown, there can be an extension cable 12 between the apparatus 10 and the preamplifier 11, so that the measuring microphone M1 can be placed remotely from the apparatus 10.
  • the apparatus 10 has an electronic circuit 13 that receives the signals from the preamplifier 11.
  • the electronic circuit 13 comprises a circuit 14 for ana- lysing the signals received from the measuring microphone M1 through the preamplifier 11.
  • the analyser 14 is preferably a digital analyser, and is controlled by a controller 15.
  • the analyser 14 is connected to a storage device 16, and analysis results from the analyser 14 are stored in the storage device 16.
  • the stored analysis results from the analyser 14 correspond to a period of time that can be selected by the user or can be selected by the controller depending e.g. on the occurrence of predefined events.
  • the output signals from the analyser 14 to the storage device 16 are preferably the analysis results in digital form, but the signals from the measuring microphone M1 can also be stored directly.
  • the analyser comprises filters for analysing the sound signals.
  • filters for analysing the sound signals. Examples of such filters are weighting filters for assessing occupational noise levels, octave and third-octave filters for frequency analysis and narrow band filters for harmonic analysis.
  • the apparatus 10 has an annotation microphone M2 for receiving e.g. voice signals from an operator and for outputting signals representing the voice signals.
  • the signals from the annotation microphone M2 are stored in the storage 16 in parallel with the signals from the analyser 14. This gives the user the possibility of annotating the sound signals to be measured and analysed or the analysis results.
  • annotations can be the operator's comments on the measuring setup or to relevant events, and the operator's comments are stored concurrently with the analysis results.
  • the annotation microphone M2 can be remote from the apparatus 10, or it can be built into the apparatus.
  • the operator For manually inputting commands to the apparatus the operator uses a user interface USER INPUT.
  • the user interface may comprise pushbuttons, switches, and rotary knobs etc that are used for manually setting modes of operation of the apparatus.
  • a switch can be used for activating the annotation microphone M2.
  • a clock CLK generates time signals that are also stored in the storage 16 concurrently with the signals from the analyser 14 to provide a time-stamping of the stored data.
  • the generated time signals can also be used for performing measurements with predefined start and stop times defined by the user.
  • a camera CAM can take still pictures and video sequences and is used for taking pictures of e.g. the measuring location and of events relating thereto. Pictures and video sequences taken with the camera are stored in the storage together with the corresponding sound signals or analysis results.
  • the apparatus For documenting the exact geographical location of the measurement the apparatus has a built-in receiver GPS for receiving signals e.g. from the satellite-based Global Positioning System enabling the apparatus to calculate and document exact geographical location. Such data is stored in the storage together with the corresponding sound signals or analysis results. Instead of a built-in GPS receiver the apparatus can be connected to an external receiver.
  • a built-in GPS receiver GPS for receiving signals e.g. from the satellite-based Global Positioning System enabling the apparatus to calculate and document exact geographical location.
  • Such data is stored in the storage together with the corresponding sound signals or analysis results.
  • the apparatus can be connected to an external receiver.
  • the operator can use both the above-mentioned user interface and a screen 17 that is used as an inter- active visual and graphical interface with the operator.
  • the screen 17 is used to display menus and settings of the apparatus.
  • the screen 17 is touch sensitive, and the operator can select menu options by touching the appropriate places on the screen with a suitable instrument such as a dedicated stylus or a writing implement, and the operator can draw sketches e.g. of the measur- ing location, which is also stored in the storage together with the corresponding sound signals or analysis results.
  • the apparatus has a connector for making a connection 18 to external equipment EXT.
  • external equipment is a computer that controls the apparatus and reads its stored data for further processing, exter- nal memory such as a memory card, an analysis and documentation system, software for download to the apparatus, communication over the Internet or using a wireless connection using e.g. the Bluetooth protocol.

Abstract

Cette invention se rapporte à un appareil de mesure et d'analyse de signaux sonores, qui comprend un microphone de mesure (M1) et un circuit d'analyse analysant les signaux émis par le premier microphone (M1). Un second microphone (M2) reçoit les signaux vocaux provenant d'un opérateur, et une mémoire enregistre à la fois les résultats de l'analyse et les signaux vocaux. Une caméra (CAM) peut effectuer une prise d'images, et la mémoire enregistre à la fois les résultats de l'analyse et les images prises par la caméra. Cet appareil offre de nouvelles et meilleures possibilités d'annoter et de documenter des mesures et des résultats d'analyse.
PCT/DK2005/000059 2004-01-30 2005-01-28 Appareil de mesure et d'analyse de signaux sonores WO2005073680A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK200400135A DK200400135A (da) 2004-01-30 2004-01-30 An apparatus for measuring and analysing sound signals
DKPA200400135 2004-01-30

Publications (1)

Publication Number Publication Date
WO2005073680A1 true WO2005073680A1 (fr) 2005-08-11

Family

ID=34814046

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2005/000059 WO2005073680A1 (fr) 2004-01-30 2005-01-28 Appareil de mesure et d'analyse de signaux sonores

Country Status (2)

Country Link
DK (1) DK200400135A (fr)
WO (1) WO2005073680A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7538663B2 (en) 2007-01-26 2009-05-26 Csi Technology, Inc. Enhancement of periodic data collection by addition of audio data
WO2011110513A1 (fr) * 2010-03-11 2011-09-15 Schaeffler Technologies Gmbh & Co. Kg Procédé et collecteur de données pour la capture, l'enregistrement et la mémorisation de vibrations et de données au niveau d'une machine
US20150350799A1 (en) * 2014-06-02 2015-12-03 Rosemount Inc. Industrial audio noise monitoring system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998010246A1 (fr) * 1996-09-06 1998-03-12 University Of Florida Gestionnaire de donnes geographiques numerique portatif et tenant dans la main
US20020181721A1 (en) * 2000-10-02 2002-12-05 Takeshi Sugiyama Sound source probing system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998010246A1 (fr) * 1996-09-06 1998-03-12 University Of Florida Gestionnaire de donnes geographiques numerique portatif et tenant dans la main
US20020181721A1 (en) * 2000-10-02 2002-12-05 Takeshi Sugiyama Sound source probing system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"Daten und Fakten - Modul-Schallanalysator 2260 Investigator", 4 June 2002 (2002-06-04), XP002302826, Retrieved from the Internet <URL:http://www.bruelkjaer.de> [retrieved on 20041027] *
"Sound-Level Meter assesses work-place and community noise", 4 June 2002 (2002-06-04), XP002302827, Retrieved from the Internet <URL:http://news.managingautomation.com/fullstory/10482> [retrieved on 20041027] *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7538663B2 (en) 2007-01-26 2009-05-26 Csi Technology, Inc. Enhancement of periodic data collection by addition of audio data
WO2011110513A1 (fr) * 2010-03-11 2011-09-15 Schaeffler Technologies Gmbh & Co. Kg Procédé et collecteur de données pour la capture, l'enregistrement et la mémorisation de vibrations et de données au niveau d'une machine
US20150350799A1 (en) * 2014-06-02 2015-12-03 Rosemount Inc. Industrial audio noise monitoring system
WO2015187264A1 (fr) * 2014-06-02 2015-12-10 Rosemount Inc. Système de surveillance de bruit audio industriel
CN105320108A (zh) * 2014-06-02 2016-02-10 罗斯蒙特公司 工业噪声监视系统
JP2017519981A (ja) * 2014-06-02 2017-07-20 ローズマウント インコーポレイテッド 産業用オーディオ騒音監視システム
US10739187B2 (en) 2014-06-02 2020-08-11 Rosemount Inc. Industrial audio noise monitoring system

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Publication number Publication date
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