JPS56146397A - Composite acoustic diaphragm - Google Patents

Composite acoustic diaphragm

Info

Publication number
JPS56146397A
JPS56146397A JP5059680A JP5059680A JPS56146397A JP S56146397 A JPS56146397 A JP S56146397A JP 5059680 A JP5059680 A JP 5059680A JP 5059680 A JP5059680 A JP 5059680A JP S56146397 A JPS56146397 A JP S56146397A
Authority
JP
Japan
Prior art keywords
aluminum
beryllium
flakes
diaphragm
aluminum foil
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
JP5059680A
Other languages
Japanese (ja)
Inventor
Shunsuke Matsuda
Yasumasa Komatsu
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 JP5059680A priority Critical patent/JPS56146397A/en
Publication of JPS56146397A publication Critical patent/JPS56146397A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

PURPOSE:To obtain an acoustic diaphragm for audio apparatus which has a high speed of sound and high internal loss, by collecting one or more kinds of flake-type materials in an array into a direction. CONSTITUTION:The beryllium flakes are arrayed on an aluminum foil, and then an aluminum foil is put on the beryllium flakes. This action is repeated until a prescribed thickness is obtained. This lamination is held by an aluminum die and heated up to a temperature in a range of 650-800 deg.C to be pressed at a time by a pressure in a range of 100-200kg/cm<2>. By this heating, the aluminum flows around the beryllium flakes to secure a connection between the beryllium and aluminum or in the aluminum itself. Thus a diaphragm is obtained. This diaphragm is cut into a diameter of 6cm and then adhered to an aluminum foil honeycomb structure to obtain a flat-plate speaker. In such method, the divided vibration can be suppressed by a high speed of sound along with a high internal loss. Thus a flat frequency characteristic can be obtained.
JP5059680A 1980-04-16 1980-04-16 Composite acoustic diaphragm Pending JPS56146397A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5059680A JPS56146397A (en) 1980-04-16 1980-04-16 Composite acoustic diaphragm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5059680A JPS56146397A (en) 1980-04-16 1980-04-16 Composite acoustic diaphragm

Publications (1)

Publication Number Publication Date
JPS56146397A true JPS56146397A (en) 1981-11-13

Family

ID=12863347

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5059680A Pending JPS56146397A (en) 1980-04-16 1980-04-16 Composite acoustic diaphragm

Country Status (1)

Country Link
JP (1) JPS56146397A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH051589U (en) * 1991-06-25 1993-01-14 株式会社北村製作所 Lift equipment for lorries

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH051589U (en) * 1991-06-25 1993-01-14 株式会社北村製作所 Lift equipment for lorries

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