JPS5595493A - Microphone speaker - Google Patents

Microphone speaker

Info

Publication number
JPS5595493A
JPS5595493A JP99579A JP99579A JPS5595493A JP S5595493 A JPS5595493 A JP S5595493A JP 99579 A JP99579 A JP 99579A JP 99579 A JP99579 A JP 99579A JP S5595493 A JPS5595493 A JP S5595493A
Authority
JP
Japan
Prior art keywords
gain
sound
pressure sensing
pressure
elements
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.)
Granted
Application number
JP99579A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6247039B2 (Direct
Inventor
Isokazu Furukawa
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP99579A priority Critical patent/JPS5595493A/ja
Publication of JPS5595493A publication Critical patent/JPS5595493A/ja
Publication of JPS6247039B2 publication Critical patent/JPS6247039B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/32—Automatic control in amplifiers having semiconductor devices the control being dependent upon ambient noise level or sound level
    • 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
    • H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback

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)
  • Control Of Amplification And Gain Control (AREA)
  • Circuit For Audible Band Transducer (AREA)
JP99579A 1979-01-11 1979-01-11 Microphone speaker Granted JPS5595493A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP99579A JPS5595493A (en) 1979-01-11 1979-01-11 Microphone speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP99579A JPS5595493A (en) 1979-01-11 1979-01-11 Microphone speaker

Publications (2)

Publication Number Publication Date
JPS5595493A true JPS5595493A (en) 1980-07-19
JPS6247039B2 JPS6247039B2 (Direct) 1987-10-06

Family

ID=11489170

Family Applications (1)

Application Number Title Priority Date Filing Date
JP99579A Granted JPS5595493A (en) 1979-01-11 1979-01-11 Microphone speaker

Country Status (1)

Country Link
JP (1) JPS5595493A (Direct)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7445598B2 (ja) 2018-09-13 2024-03-07 本田技研工業株式会社 電源システム

Also Published As

Publication number Publication date
JPS6247039B2 (Direct) 1987-10-06

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