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JPS57186898A - Loudspeaker - Google Patents

Loudspeaker

Info

Publication number
JPS57186898A
JPS57186898A JP7157681A JP7157681A JPS57186898A JP S57186898 A JPS57186898 A JP S57186898A JP 7157681 A JP7157681 A JP 7157681A JP 7157681 A JP7157681 A JP 7157681A JP S57186898 A JPS57186898 A JP S57186898A
Authority
JP
Japan
Prior art keywords
coils
bit
digital signal
bobbin
power source
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
JP7157681A
Other languages
Japanese (ja)
Inventor
Takashi Sakakibara
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 Corp
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 Corp, Pioneer Electronic Corp filed Critical Pioneer Corp
Priority to JP7157681A priority Critical patent/JPS57186898A/en
Publication of JPS57186898A publication Critical patent/JPS57186898A/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
    • H04R1/005—Details of transducers, loudspeakers or microphones using digitally weighted transducing elements

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

PURPOSE:To generate acoustic pressure with fidelity and high accuracy in response to a digital signal, by providing a driving force generating part in accordance with each bit of a parallel digital signal input, and also making magnitude of each driving force correspond to weight of each bit. CONSTITUTION:To a bobbin 1 connected to a diaphragm 2, coils L0-L3 corresponding to each bit of a digital signal are wound round, and the number of winding of these coils corresponds to weight of each bit, for instance, is 1, 2, 4 and 8. Each one end of the coils L0-L3 is connected to each other and also is connected to the + side of a DC power source E through a variable resistance VR, and the other end is connected to the - side of the power source E through analog switches S0-S3, respectively, which are turned on and off depending on a state of a corresponding bit of the digital signal. The bobbin 1 to which these coils L0-L3 have been wound round are placed in the magnetic air-gap of a magnetic circuit for generating a magnetic field in the direction falling at right angles with the coils.
JP7157681A 1981-05-13 1981-05-13 Loudspeaker Pending JPS57186898A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7157681A JPS57186898A (en) 1981-05-13 1981-05-13 Loudspeaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7157681A JPS57186898A (en) 1981-05-13 1981-05-13 Loudspeaker

Publications (1)

Publication Number Publication Date
JPS57186898A true JPS57186898A (en) 1982-11-17

Family

ID=13464657

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7157681A Pending JPS57186898A (en) 1981-05-13 1981-05-13 Loudspeaker

Country Status (1)

Country Link
JP (1) JPS57186898A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6076899A (en) * 1983-09-15 1985-05-01 エヌ・ベー・フイリツプス・フルーイランペンフアブリケン Speaker unit for converting n-bit digitized electric signal to acoustic signal
US4555797A (en) * 1983-09-15 1985-11-26 U.S. Philips Corporation Hybrid loudspeaker system for converting digital signals to acoustic signals
US4566120A (en) * 1983-09-15 1986-01-21 U.S. Philips Corporation Loudspeaker system and loudspeaker for use in a loud-speaker system for converting an n-bit digitized electric signal into an acoustic signal
JPS62178694U (en) * 1986-05-01 1987-11-13
JPS637896U (en) * 1986-07-02 1988-01-19
JPS63102597A (en) * 1986-10-20 1988-05-07 Matsushita Electric Ind Co Ltd Speaker
US5862237A (en) * 1996-06-18 1999-01-19 Sony Corporation Speaker apparatus
US5909496A (en) * 1996-11-07 1999-06-01 Sony Corporation Speaker apparatus
US6028943A (en) * 1998-04-30 2000-02-22 Matsushita Electric Industrial Co., Ltd. Audio amplifier system using a class D amplifier

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6076899A (en) * 1983-09-15 1985-05-01 エヌ・ベー・フイリツプス・フルーイランペンフアブリケン Speaker unit for converting n-bit digitized electric signal to acoustic signal
US4555797A (en) * 1983-09-15 1985-11-26 U.S. Philips Corporation Hybrid loudspeaker system for converting digital signals to acoustic signals
US4566120A (en) * 1983-09-15 1986-01-21 U.S. Philips Corporation Loudspeaker system and loudspeaker for use in a loud-speaker system for converting an n-bit digitized electric signal into an acoustic signal
US4612420A (en) * 1983-09-15 1986-09-16 U.S. Philips Corporation Loudspeaker system for converting a digitized electric signal into an acoustic signal
JPS62178694U (en) * 1986-05-01 1987-11-13
JPS637896U (en) * 1986-07-02 1988-01-19
JPH0513118Y2 (en) * 1986-07-02 1993-04-06
JPS63102597A (en) * 1986-10-20 1988-05-07 Matsushita Electric Ind Co Ltd Speaker
US5862237A (en) * 1996-06-18 1999-01-19 Sony Corporation Speaker apparatus
US5909496A (en) * 1996-11-07 1999-06-01 Sony Corporation Speaker apparatus
US6028943A (en) * 1998-04-30 2000-02-22 Matsushita Electric Industrial Co., Ltd. Audio amplifier system using a class D amplifier

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