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GB299041A - Improvements in or relating to electrical transmission systems - Google Patents

Improvements in or relating to electrical transmission systems

Info

Publication number
GB299041A
GB299041A GB28418/28A GB2841828A GB299041A GB 299041 A GB299041 A GB 299041A GB 28418/28 A GB28418/28 A GB 28418/28A GB 2841828 A GB2841828 A GB 2841828A GB 299041 A GB299041 A GB 299041A
Authority
GB
United Kingdom
Prior art keywords
impedance
microphones
potentiometers
resistances
microphone
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
Application number
GB28418/28A
Other languages
English (en)
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.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products Inc
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 Electrical Research Products Inc filed Critical Electrical Research Products Inc
Publication of GB299041A publication Critical patent/GB299041A/en
Expired 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
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones

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)
  • Adjustable Resistors (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Amplifiers (AREA)
GB28418/28A 1927-10-21 1928-10-03 Improvements in or relating to electrical transmission systems Expired GB299041A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US227693A US1778779A (en) 1927-10-21 1927-10-21 Control circuit for transmission systems

Publications (1)

Publication Number Publication Date
GB299041A true GB299041A (en) 1930-01-03

Family

ID=22854102

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28418/28A Expired GB299041A (en) 1927-10-21 1928-10-03 Improvements in or relating to electrical transmission systems

Country Status (3)

Country Link
US (1) US1778779A (de)
DE (1) DE631784C (de)
GB (1) GB299041A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2317529A (en) * 1996-09-04 1998-03-25 Michael Holdsworth Microphone/audio mixer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2317529A (en) * 1996-09-04 1998-03-25 Michael Holdsworth Microphone/audio mixer
GB2317529B (en) * 1996-09-04 2000-11-15 Michael Holdsworth Microphone/audio mixer

Also Published As

Publication number Publication date
DE631784C (de) 1936-06-29
US1778779A (en) 1930-10-21

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