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CH500647A - Portable microphone and amplifier device - Google Patents

Portable microphone and amplifier device

Info

Publication number
CH500647A
CH500647A CH688069A CH688069A CH500647A CH 500647 A CH500647 A CH 500647A CH 688069 A CH688069 A CH 688069A CH 688069 A CH688069 A CH 688069A CH 500647 A CH500647 A CH 500647A
Authority
CH
Switzerland
Prior art keywords
amplifier device
portable microphone
microphone
portable
amplifier
Prior art date
Application number
CH688069A
Other languages
German (de)
Inventor
Peiker Heinrich
Original Assignee
Peiker Heinrich
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 Peiker Heinrich filed Critical Peiker Heinrich
Priority to CH688069A priority Critical patent/CH500647A/en
Priority to DE19691931264 priority patent/DE1931264B2/en
Publication of CH500647A publication Critical patent/CH500647A/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
    • 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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • 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
    • H04R27/04—Electric megaphones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Circuit For Audible Band Transducer (AREA)
CH688069A 1969-05-05 1969-05-05 Portable microphone and amplifier device CH500647A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CH688069A CH500647A (en) 1969-05-05 1969-05-05 Portable microphone and amplifier device
DE19691931264 DE1931264B2 (en) 1969-05-05 1969-06-20 SPEAKER SYSTEM

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH688069A CH500647A (en) 1969-05-05 1969-05-05 Portable microphone and amplifier device

Publications (1)

Publication Number Publication Date
CH500647A true CH500647A (en) 1970-12-15

Family

ID=4316496

Family Applications (1)

Application Number Title Priority Date Filing Date
CH688069A CH500647A (en) 1969-05-05 1969-05-05 Portable microphone and amplifier device

Country Status (2)

Country Link
CH (1) CH500647A (en)
DE (1) DE1931264B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0293205A2 (en) * 1987-05-27 1988-11-30 Robert Stewart Knight Public address amplifier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0293205A2 (en) * 1987-05-27 1988-11-30 Robert Stewart Knight Public address amplifier
EP0293205A3 (en) * 1987-05-27 1989-12-13 Robert Stewart Knight Public address amplifier

Also Published As

Publication number Publication date
DE1931264B2 (en) 1973-05-30
DE1931264A1 (en) 1970-11-19

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Legal Events

Date Code Title Description
PL Patent ceased