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WO2008036992A3 - Method and measuring device for monitoring loudspeaker systems - Google Patents

Method and measuring device for monitoring loudspeaker systems Download PDF

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Publication number
WO2008036992A3
WO2008036992A3 PCT/AT2007/000454 AT2007000454W WO2008036992A3 WO 2008036992 A3 WO2008036992 A3 WO 2008036992A3 AT 2007000454 W AT2007000454 W AT 2007000454W WO 2008036992 A3 WO2008036992 A3 WO 2008036992A3
Authority
WO
WIPO (PCT)
Prior art keywords
impedance
value
values
compared
current
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.)
Ceased
Application number
PCT/AT2007/000454
Other languages
German (de)
French (fr)
Other versions
WO2008036992A2 (en
Inventor
Josef Schreiner
Wolfgang Zelenka
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.)
AV Digital Audio Videotechnik GmbH
Original Assignee
AV Digital Audio Videotechnik GmbH
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 AV Digital Audio Videotechnik GmbH filed Critical AV Digital Audio Videotechnik GmbH
Priority to EP07800194.8A priority Critical patent/EP2070388B1/en
Publication of WO2008036992A2 publication Critical patent/WO2008036992A2/en
Publication of WO2008036992A3 publication Critical patent/WO2008036992A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R29/00—Monitoring arrangements; Testing arrangements
    • H04R29/007—Monitoring arrangements; Testing arrangements for public address systems

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

Disclosed are a method and a device for monitoring loudspeaker lines. In said method, a least one alternating current signal having a predefined frequency is fed to a loudspeaker line, the voltage and current are measured, and the input impedance on the line is determined therefrom and is compared with a reference value. In order to determine an impedance that is to be compared with a reference value (ZRef) in a measurement process, a plurality of analogue measured voltage and current values are converted into digital signals which are subjected to Fourier transformation, a corresponding plurality of impedance values are determined from the Fourier-transformed current and voltage values, said impedance values are averaged, and the obtained mean value is compared with a reference impedance value. An error signal is output if the obtained mean value deviates from the reference impedance value by a defined tolerance value.
PCT/AT2007/000454 2006-09-28 2007-09-27 Method and measuring device for monitoring loudspeaker systems Ceased WO2008036992A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07800194.8A EP2070388B1 (en) 2006-09-28 2007-09-27 Method and measuring device for monitoring loudspeaker systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1618/2006 2006-09-28
AT0161806A AT504297B1 (en) 2006-09-28 2006-09-28 METHOD AND MEASURING DEVICE FOR MONITORING SOUNDPROOFING SYSTEMS

Publications (2)

Publication Number Publication Date
WO2008036992A2 WO2008036992A2 (en) 2008-04-03
WO2008036992A3 true WO2008036992A3 (en) 2008-10-30

Family

ID=39230549

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2007/000454 Ceased WO2008036992A2 (en) 2006-09-28 2007-09-27 Method and measuring device for monitoring loudspeaker systems

Country Status (3)

Country Link
EP (1) EP2070388B1 (en)
AT (1) AT504297B1 (en)
WO (1) WO2008036992A2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008057437B4 (en) 2008-11-14 2012-08-30 Gräf & Meyer GmbH Apparatus and method for short circuit isolation in speaker ring lines of electroacoustic installations
WO2011117557A2 (en) * 2010-03-26 2011-09-29 Finsecur Method and device for loudspeaker control
FR2958107B1 (en) * 2010-03-26 2012-08-31 Finsecur METHOD AND DEVICE FOR CONTROLLING LOUDSPEAKER
DE102010047220B4 (en) * 2010-10-04 2012-07-05 Novar Gmbh Method for operating a voice announcement system
EP2884773B1 (en) * 2013-12-10 2017-02-15 Televic Rail NV Public address system and method
AT514916B1 (en) * 2014-01-22 2015-05-15 Itec Tontechnik Und Industrieelektronik Ges M B H Method and device for monitoring a loudspeaker system
DE202015001656U1 (en) 2015-03-04 2015-03-24 Itec Tontechnik Und Industrieelektronik Gesellschaft M.B.H. Device for monitoring a public address system
DE102015206570A1 (en) * 2015-04-13 2016-10-13 Robert Bosch Gmbh Audio system, calibration module, operating method and computer program
DE102019210414A1 (en) 2019-07-15 2021-01-21 Robert Bosch Gmbh Evaluation device and method for analyzing a public address system and public address system
CN114223218B (en) * 2019-08-14 2025-01-07 杜比实验室特许公司 Method and system for monitoring and reporting speaker health
CN119865742A (en) * 2023-10-20 2025-04-22 武汉市聚芯微电子有限责任公司 Speaker resonance frequency determination method, speaker resonance frequency determination device, electronic device, and storage medium

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH659357A5 (en) * 1982-07-05 1987-01-15 Zellweger Uster Ag Method of balancing the electro-acoustic transmission factor of electro-dynamic converters, particularly for telephones
US5345510A (en) * 1992-07-13 1994-09-06 Rauland-Borg Corporation Integrated speaker supervision and alarm system
JPH10136493A (en) * 1996-10-28 1998-05-22 Toa Corp Inspection device for speaker line
JP2001036995A (en) * 1999-07-21 2001-02-09 Toa Corp Abnormality detecting device for speaker line
WO2001043303A2 (en) * 1999-12-09 2001-06-14 Harris Corporation Detection of bridged taps by frequency domain reflectometry
US20060126857A1 (en) * 2004-12-15 2006-06-15 Motorola, Inc. Speaker diagnostics based upon driving-point impedance

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855415A (en) * 1973-07-20 1974-12-17 Kane Corp Du Communication sound system continuously monitored

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH659357A5 (en) * 1982-07-05 1987-01-15 Zellweger Uster Ag Method of balancing the electro-acoustic transmission factor of electro-dynamic converters, particularly for telephones
US5345510A (en) * 1992-07-13 1994-09-06 Rauland-Borg Corporation Integrated speaker supervision and alarm system
JPH10136493A (en) * 1996-10-28 1998-05-22 Toa Corp Inspection device for speaker line
JP2001036995A (en) * 1999-07-21 2001-02-09 Toa Corp Abnormality detecting device for speaker line
WO2001043303A2 (en) * 1999-12-09 2001-06-14 Harris Corporation Detection of bridged taps by frequency domain reflectometry
US20060126857A1 (en) * 2004-12-15 2006-06-15 Motorola, Inc. Speaker diagnostics based upon driving-point impedance

Also Published As

Publication number Publication date
EP2070388A2 (en) 2009-06-17
EP2070388B1 (en) 2018-05-23
AT504297B1 (en) 2009-11-15
AT504297A1 (en) 2008-04-15
WO2008036992A2 (en) 2008-04-03

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