JPS57109499A - Electric acoustic transducer - Google Patents

Electric acoustic transducer

Info

Publication number
JPS57109499A
JPS57109499A JP18676480A JP18676480A JPS57109499A JP S57109499 A JPS57109499 A JP S57109499A JP 18676480 A JP18676480 A JP 18676480A JP 18676480 A JP18676480 A JP 18676480A JP S57109499 A JPS57109499 A JP S57109499A
Authority
JP
Japan
Prior art keywords
coil
case
sound
coils
constitution
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.)
Pending
Application number
JP18676480A
Other languages
Japanese (ja)
Inventor
Mitsuru Toyoda
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP18676480A priority Critical patent/JPS57109499A/en
Publication of JPS57109499A publication Critical patent/JPS57109499A/en
Pending 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
    • H04R11/00—Transducers of moving-armature or moving-core type

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

PURPOSE:To output not only a monotonic sound of constant by frequency being present at 2-5kHz but also a voice, etc. by high acoustic pressure, by use of a small-sized electromagnetic loudspeaker incorporated in an electronic timepiece. CONSTITUTION:2 coils 61, 62 whose ratio N/R of the number of turns N and a DC resistance value R is different respectively are provided round a magnetic core 5. An ampereturn value of the coil 61 is large, and that of the coil 62 is small. In case when the coil 61 and 62 have been used separately, the full line and the dotted line in the figure show the case when the coil 61 is driven and the coil 62 is driven, respectively. Therefore, when frequency of a voice band of about 1kHz is sounded, the coil 61 is used, and in case of a monotonic sound which has utilized a resonance point of 4kHz, etc., the coil 62 is used. According to such a constitution, both the coils are capable of generating moderate acoustic pressure as an alarm sound.
JP18676480A 1980-12-26 1980-12-26 Electric acoustic transducer Pending JPS57109499A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18676480A JPS57109499A (en) 1980-12-26 1980-12-26 Electric acoustic transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18676480A JPS57109499A (en) 1980-12-26 1980-12-26 Electric acoustic transducer

Publications (1)

Publication Number Publication Date
JPS57109499A true JPS57109499A (en) 1982-07-07

Family

ID=16194219

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18676480A Pending JPS57109499A (en) 1980-12-26 1980-12-26 Electric acoustic transducer

Country Status (1)

Country Link
JP (1) JPS57109499A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61135300A (en) * 1984-12-06 1986-06-23 Fuji Elelctrochem Co Ltd Flat type dynamic speaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61135300A (en) * 1984-12-06 1986-06-23 Fuji Elelctrochem Co Ltd Flat type dynamic speaker

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