JPS574697A - Speaker - Google Patents

Speaker

Info

Publication number
JPS574697A
JPS574697A JP7859980A JP7859980A JPS574697A JP S574697 A JPS574697 A JP S574697A JP 7859980 A JP7859980 A JP 7859980A JP 7859980 A JP7859980 A JP 7859980A JP S574697 A JPS574697 A JP S574697A
Authority
JP
Japan
Prior art keywords
air
damper
bobbin
compliance
tip
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
JP7859980A
Other languages
Japanese (ja)
Inventor
Koshin Shimada
Toshiyuki Mizutani
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7859980A priority Critical patent/JPS574697A/en
Publication of JPS574697A publication Critical patent/JPS574697A/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

PURPOSE:To avoid a change of the sound pressure properties of a low band although a speaker is driven for a long time and with a large input, by sealing up the tip of a voice coil bobbin to form an air damper which is inserted in series into a damper on a machine equivalent circuit. CONSTITUTION:When the tip of a voice coil bobbin 4 is covered with a cover 11, the air in the bobbin 4 does not flow outside since the air resistance is large in terms of AC (a state under which the bobbin 4 goes in and comes out the center pole 1) in the gap between the inner surface of the bobbin 4 and the pole 1. As a result, a kind of air damper is formed. In this case, the compliance C1' caused by the air damper is inserted in series to the compliance C1 of a damper 9. Accordingly the C1' never changes although the damper 9 wears to increase the C1 and as long as the air pressure does not vary. As a result, the speed of the air flowing to the mass MC of vibration system never becomes higher than a constant value.
JP7859980A 1980-06-10 1980-06-10 Speaker Pending JPS574697A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7859980A JPS574697A (en) 1980-06-10 1980-06-10 Speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7859980A JPS574697A (en) 1980-06-10 1980-06-10 Speaker

Publications (1)

Publication Number Publication Date
JPS574697A true JPS574697A (en) 1982-01-11

Family

ID=13666359

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7859980A Pending JPS574697A (en) 1980-06-10 1980-06-10 Speaker

Country Status (1)

Country Link
JP (1) JPS574697A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5594462A (en) * 1979-01-13 1980-07-17 Daido Steel Co Ltd Free-cutting high-carbon high-manganese steel
JPS5594464A (en) * 1979-01-11 1980-07-17 Daido Steel Co Ltd Low-carbon high-manganese steel with high machinability

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5594464A (en) * 1979-01-11 1980-07-17 Daido Steel Co Ltd Low-carbon high-manganese steel with high machinability
JPS5594462A (en) * 1979-01-13 1980-07-17 Daido Steel Co Ltd Free-cutting high-carbon high-manganese steel

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