FR2274194A1 - Distortion and intermodulation correction for loudspeaker - sound absorbing material in domed cavities in cone - Google Patents

Distortion and intermodulation correction for loudspeaker - sound absorbing material in domed cavities in cone

Info

Publication number
FR2274194A1
FR2274194A1 FR7420624A FR7420624A FR2274194A1 FR 2274194 A1 FR2274194 A1 FR 2274194A1 FR 7420624 A FR7420624 A FR 7420624A FR 7420624 A FR7420624 A FR 7420624A FR 2274194 A1 FR2274194 A1 FR 2274194A1
Authority
FR
France
Prior art keywords
cone
loudspeaker
distortion
sound absorbing
absorbing material
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.)
Granted
Application number
FR7420624A
Other languages
French (fr)
Other versions
FR2274194B1 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7420624A priority Critical patent/FR2274194A1/en
Priority to MC1132A priority patent/MC1049A1/en
Publication of FR2274194A1 publication Critical patent/FR2274194A1/en
Application granted granted Critical
Publication of FR2274194B1 publication Critical patent/FR2274194B1/fr
Granted 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
    • H04R7/12—Non-planar diaphragms or cones
    • 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
    • H04R7/26—Damping by means acting directly on free portion of diaphragm or cone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Landscapes

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

Abstract

An electrodynamic loudspeaker has the conical shaped vibrating membrane (1) of the low frequency loudspeaker attached to a coil former (2) on which the coil (3) is wound. The membrane is suspended flexibly at its outer extremity by a ring (7) of flexible material attached by its periphery to the rigid frame (8). The inner extremity is supported and centralised by a readily deformable bellows (9). Two dome shaped partitions (13, 14) are fixed in the cone to form two truncated cone shaped cavities which are filled with low density sound absorbing material such as glass wool to correct for distortion and intermodulation by attenuating transverse vibrations and deformations of the membrane.
FR7420624A 1974-06-07 1974-06-07 Distortion and intermodulation correction for loudspeaker - sound absorbing material in domed cavities in cone Granted FR2274194A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7420624A FR2274194A1 (en) 1974-06-07 1974-06-07 Distortion and intermodulation correction for loudspeaker - sound absorbing material in domed cavities in cone
MC1132A MC1049A1 (en) 1974-06-07 1974-12-04 Electro-dynamic speakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7420624A FR2274194A1 (en) 1974-06-07 1974-06-07 Distortion and intermodulation correction for loudspeaker - sound absorbing material in domed cavities in cone

Publications (2)

Publication Number Publication Date
FR2274194A1 true FR2274194A1 (en) 1976-01-02
FR2274194B1 FR2274194B1 (en) 1977-10-07

Family

ID=9140036

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7420624A Granted FR2274194A1 (en) 1974-06-07 1974-06-07 Distortion and intermodulation correction for loudspeaker - sound absorbing material in domed cavities in cone

Country Status (2)

Country Link
FR (1) FR2274194A1 (en)
MC (1) MC1049A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4122314A (en) * 1976-12-23 1978-10-24 Sony Corporation Loudspeaker having a laminate diaphragm of three layers
FR2500705A1 (en) * 1981-02-25 1982-08-27 Leybold Heraeus Sogev Low frequency generator for waves on liquid surface - uses capillary tube connected to sealed chamber of predetermined volume formed by loudspeaker cone
EP0072206A1 (en) * 1981-08-07 1983-02-16 John Strohbeen Loudspeaker system for producing coherent sound
FR2583605A1 (en) * 1985-06-14 1986-12-19 Zamora Castro Loudspeaker with two magnets and diaphragm with central suspension

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4122314A (en) * 1976-12-23 1978-10-24 Sony Corporation Loudspeaker having a laminate diaphragm of three layers
FR2500705A1 (en) * 1981-02-25 1982-08-27 Leybold Heraeus Sogev Low frequency generator for waves on liquid surface - uses capillary tube connected to sealed chamber of predetermined volume formed by loudspeaker cone
EP0072206A1 (en) * 1981-08-07 1983-02-16 John Strohbeen Loudspeaker system for producing coherent sound
US4440259A (en) * 1981-08-07 1984-04-03 John Strohbeen Loudspeaker system for producing coherent sound
FR2583605A1 (en) * 1985-06-14 1986-12-19 Zamora Castro Loudspeaker with two magnets and diaphragm with central suspension

Also Published As

Publication number Publication date
MC1049A1 (en) 1975-10-10
FR2274194B1 (en) 1977-10-07

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Legal Events

Date Code Title Description
ST Notification of lapse