JPS5668095A - Case of headphone - Google Patents

Case of headphone

Info

Publication number
JPS5668095A
JPS5668095A JP14431779A JP14431779A JPS5668095A JP S5668095 A JPS5668095 A JP S5668095A JP 14431779 A JP14431779 A JP 14431779A JP 14431779 A JP14431779 A JP 14431779A JP S5668095 A JPS5668095 A JP S5668095A
Authority
JP
Japan
Prior art keywords
case
mixed
main body
graphite powder
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
JP14431779A
Other languages
Japanese (ja)
Inventor
Toshikazu Yoshimi
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP14431779A priority Critical patent/JPS5668095A/en
Publication of JPS5668095A publication Critical patent/JPS5668095A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1008—Earpieces of the supra-aural or circum-aural type

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Headphones And Earphones (AREA)

Abstract

PURPOSE:To absorb vibration in the case of a large output, by using materials where graphite powder is mixed with high-molecular materials by heating. CONSTITUTION:Polyethylene chloride is mixed with polyvinyl chloride and so on for the purpose of improving internal loss to prepare graphite powder of average particle diameter 5 or less. High-molecular materials and 25-50 or 75-50wt% graphite powder are mixed, and a plasticizer and a stabilizer are added to mix them by heating, and they are molded by compression to form main body 1. Damping material 2 consisting of a viscous fluid is filled in internal space 1a. By this constitution, vibration is absorbed largely because internal loss of the case main body is large. This case main body has a large Young's modulus and is light-weight and has a widened resonance characteristic, and what is called case sounding is reduced considerably for a large output.
JP14431779A 1979-11-09 1979-11-09 Case of headphone Pending JPS5668095A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14431779A JPS5668095A (en) 1979-11-09 1979-11-09 Case of headphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14431779A JPS5668095A (en) 1979-11-09 1979-11-09 Case of headphone

Publications (1)

Publication Number Publication Date
JPS5668095A true JPS5668095A (en) 1981-06-08

Family

ID=15359269

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14431779A Pending JPS5668095A (en) 1979-11-09 1979-11-09 Case of headphone

Country Status (1)

Country Link
JP (1) JPS5668095A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013021590A (en) * 2011-07-13 2013-01-31 Jvc Kenwood Corp Earphone

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013021590A (en) * 2011-07-13 2013-01-31 Jvc Kenwood Corp Earphone

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