GB2432091B - Improvements to a public address system having zone isolator circuits - Google Patents

Improvements to a public address system having zone isolator circuits

Info

Publication number
GB2432091B
GB2432091B GB0521337A GB0521337A GB2432091B GB 2432091 B GB2432091 B GB 2432091B GB 0521337 A GB0521337 A GB 0521337A GB 0521337 A GB0521337 A GB 0521337A GB 2432091 B GB2432091 B GB 2432091B
Authority
GB
United Kingdom
Prior art keywords
signal
public address
signal wires
pass
address system
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.)
Expired - Fee Related
Application number
GB0521337A
Other versions
GB2432091A (en
GB0521337D0 (en
Inventor
Eric Priest
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.)
Protec Fire Detection PLC
Original Assignee
Protec Fire Detection PLC
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 Protec Fire Detection PLC filed Critical Protec Fire Detection PLC
Priority to GB0521337A priority Critical patent/GB2432091B/en
Publication of GB0521337D0 publication Critical patent/GB0521337D0/en
Priority to AT06255349T priority patent/ATE439744T1/en
Priority to DE602006008402T priority patent/DE602006008402D1/en
Priority to EP06255349A priority patent/EP1777988B1/en
Publication of GB2432091A publication Critical patent/GB2432091A/en
Application granted granted Critical
Publication of GB2432091B publication Critical patent/GB2432091B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R27/00—Public address systems
    • 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
    • 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
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Amplifiers (AREA)
  • Near-Field Transmission Systems (AREA)
  • Selective Calling Equipment (AREA)

Abstract

A public address network includes a driver unit (11) that comprises a high pass circuitry pass and a low pass circuitry pass. The high pass part drives an audio signal (14) on to a pair of signal wires (12). The low pass part comprises a gyrator circuit that drives a pilot signal (15) on to the pair of signal wires (12). The signal wires transmit the audio signal and deliver it to one or more audio output units (16). The signal wires also transmit the pilot signal and deliver it to one or more isolator circuits (20). Each isolator circuit is arranged to operatively isolate a section of the signal wires.
GB0521337A 2005-10-20 2005-10-20 Improvements to a public address system having zone isolator circuits Expired - Fee Related GB2432091B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB0521337A GB2432091B (en) 2005-10-20 2005-10-20 Improvements to a public address system having zone isolator circuits
AT06255349T ATE439744T1 (en) 2005-10-20 2006-10-17 IMPROVEMENTS TO A SOUND SYSTEM WITH AREA ISOLATOR CIRCUITS
DE602006008402T DE602006008402D1 (en) 2005-10-20 2006-10-17 Improvements to a public address system with area isolator circuits
EP06255349A EP1777988B1 (en) 2005-10-20 2006-10-17 Improvements to a public address system having zone isolator circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0521337A GB2432091B (en) 2005-10-20 2005-10-20 Improvements to a public address system having zone isolator circuits

Publications (3)

Publication Number Publication Date
GB0521337D0 GB0521337D0 (en) 2005-11-30
GB2432091A GB2432091A (en) 2007-05-09
GB2432091B true GB2432091B (en) 2009-06-17

Family

ID=35458343

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0521337A Expired - Fee Related GB2432091B (en) 2005-10-20 2005-10-20 Improvements to a public address system having zone isolator circuits

Country Status (4)

Country Link
EP (1) EP1777988B1 (en)
AT (1) ATE439744T1 (en)
DE (1) DE602006008402D1 (en)
GB (1) GB2432091B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019123636A1 (en) * 2017-12-22 2019-06-27 Toa 株式会社 Broadcasting system
EP4134954B1 (en) * 2021-08-09 2023-08-02 OPTImic GmbH Method and device for improving an audio signal

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3989908A (en) * 1975-06-26 1976-11-02 General Signal Corporation Speaker supervision in a public address system
DE3627960C1 (en) * 1986-08-18 1987-09-03 Philips Patentverwaltung Monitoring device for loudspeaker installations
GB2299238A (en) * 1995-03-22 1996-09-25 Audix Communications Limited Loudspeaker with means to prevent drawing excessive current
EP0967833A2 (en) * 1998-06-27 1999-12-29 Protec Fire Detection Plc PA system having zone isolator circuits

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB523057A (en) * 1938-11-24 1940-07-04 Guided Radio Corp Improvements in telephone and like electric signalling systems
US20040184598A1 (en) * 2001-10-30 2004-09-23 Integration Associates Inc. Method and apparatus for isolation in a Caller ID or call monitor interface circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3989908A (en) * 1975-06-26 1976-11-02 General Signal Corporation Speaker supervision in a public address system
DE3627960C1 (en) * 1986-08-18 1987-09-03 Philips Patentverwaltung Monitoring device for loudspeaker installations
GB2299238A (en) * 1995-03-22 1996-09-25 Audix Communications Limited Loudspeaker with means to prevent drawing excessive current
EP0967833A2 (en) * 1998-06-27 1999-12-29 Protec Fire Detection Plc PA system having zone isolator circuits

Also Published As

Publication number Publication date
GB2432091A (en) 2007-05-09
EP1777988A3 (en) 2008-05-28
EP1777988B1 (en) 2009-08-12
EP1777988A2 (en) 2007-04-25
DE602006008402D1 (en) 2009-09-24
ATE439744T1 (en) 2009-08-15
GB0521337D0 (en) 2005-11-30

Similar Documents

Publication Publication Date Title
MXPA02002585A (en) Audio surround sound power management switching.
DE60014062D1 (en) FLEXIBLE MICROSYSTEM AND MANUFACTURING TECHNIQUES
TW200638329A (en) Signal line drive circuit, light emitting device, and its drive method
MXPA03006691A (en) Waferized power connector.
FR2835986B1 (en) AUDIOVISUAL SIGNAL TRANSMISSION SYSTEM BETWEEN NODE (S) SOURCE AND NODE (S) TO RECEIVE (S)
AU2003233604A1 (en) Forming a multi segment integrated circuit with isolated substrates
WO2006060560A3 (en) Flexible lighting and sound configuration
TW200502908A (en) Shift register and display device having the same
WO2002011509A8 (en) Hearing device and set of such devices
TW200612169A (en) Circuit film and display device including the same
GB2432091B (en) Improvements to a public address system having zone isolator circuits
TW200710810A (en) Signal transmission circuit, electro-optical device, and electronic apparatus
WO2007055731A3 (en) Optical signal jitter reduction via electrical equalization in optical transmission systems
TW200632845A (en) Circuit and method for driving display panel
KR970063275A (en) Semiconductor Integrated Circuits and Circuit Devices Using the Same
ES2184972T3 (en) PROVISION OF DIFFERENTIAL OUTPUT AMPLIFIER AND METHOD FOR TUNING THE OUTPUT IMPEDANCE OF A DIFFERENTIAL OUTPUT AMPLIFIER.
TW200605699A (en) Remote control of phantom power supplied microphones
MXPA05003483A (en) Park-brake monitoring-system for a vehicle.
CA2376687A1 (en) Indicating device
TW200705341A (en) POP noise process circuit structure applying to panel display apparatus
WO2001084883A3 (en) Planar speaker wiring layout
WO2005034339A3 (en) Low noise cmos amplifier for imaging sensors
AU2003263840A1 (en) Differential signaling transmission circuit
TWI259430B (en) Liquid crystal display device
TW200507504A (en) Attenuator and portable telephone terminal apparatus using the same

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20171020