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

Method and measuring device for monitoring loudspeaker systems Download PDF

Info

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
Application number
PCT/AT2007/000454
Other languages
German (de)
French (fr)
Other versions
WO2008036992A2 (en
Inventor
Josef Schreiner
Wolfgang Zelenka
Original Assignee
Av Digital Audio Videotechnik
Josef Schreiner
Wolfgang Zelenka
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, Josef Schreiner, Wolfgang Zelenka filed Critical Av Digital Audio Videotechnik
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

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)
  • Circuit For Audible Band Transducer (AREA)
  • Testing Electric Properties And Detecting Electric Faults (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 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 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 (10)

* 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
FR2958107B1 (en) * 2010-03-26 2012-08-31 Finsecur METHOD AND DEVICE FOR CONTROLLING LOUDSPEAKER
ES2525499T3 (en) * 2010-03-26 2014-12-23 Finsecur Procedure and speaker control device
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
EP4014515B1 (en) * 2019-08-14 2023-09-27 Dolby Laboratories Licensing Corporation Method and system for monitoring and reporting speaker health

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

Similar Documents

Publication Publication Date Title
WO2008036992A3 (en) Method and measuring device for monitoring loudspeaker systems
CN101794575B (en) Method for phase mismatch calibration for an array microphone and phase calibration module for the same
US9482705B2 (en) Measurement of voltage standing wave ratio of antenna system
WO2008129832A1 (en) Ultrasonic wave measuring method and device
CN106370211B (en) Sensor device, assessment equipment and corresponding system and method
WO2011051782A3 (en) Methods and apparatus to process time series data for propagating signals in a subterranean formation
WO2015038257A3 (en) Systems and methods for detection of load impedance of a transducer device coupled to an audio device
AU2009331596A8 (en) Method for detecting an electric arc in photovoltaic equipment
EP3736578A3 (en) Current measurement
NZ607455A (en) A monitoring or predicting system and method for detecting the onset of a neurological episode
WO2007092402A3 (en) Encoder signal analysis system for high-resolution position measurement
WO2008001334A3 (en) Signal integration measure for seismic data
CN102970646B (en) Loudspeaker abnormal sound detection circuit device and detection method based on constant current source power amplification
TW201129810A (en) Test apparatus and method for measuring common-mode capacitance
JP6257188B2 (en) measuring device
JP2006187002A5 (en)
JP2008233063A5 (en)
WO2009001160A4 (en) Method for low frequency noise cancellation in magneto-resistive mixed sensors
WO2011054696A3 (en) Field device for process instrumentation
CN103001627A (en) Trimming control system for resonance frequency of quartz crystals
WO2012040672A3 (en) Jitter reduction of electrical signals from limiting optical modules
CN105242104A (en) Current detection method, current detection device, and current detector
CN106559079B (en) Signal processing circuit
ATE510187T1 (en) METHOD FOR SAFE DETECTION OF SEVERAL ANALOG INPUT SIGNALS, ANALOG INPUT CIRCUIT AND MEASUREMENT SENSOR AND TRANSDUCER WITH SUCH AN ANALOG INPUT CIRCUIT
US9510119B2 (en) Method and device for detecting function of loudspeaker module

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 2007800194

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE