FR580581A - Purificateur de son - Google Patents

Purificateur de son

Info

Publication number
FR580581A
FR580581A FR580581DA FR580581A FR 580581 A FR580581 A FR 580581A FR 580581D A FR580581D A FR 580581DA FR 580581 A FR580581 A FR 580581A
Authority
FR
France
Prior art keywords
purifier
sound
sound purifier
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.)
Expired
Application number
Other languages
English (en)
Inventor
Henry Lion
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 filed Critical
Application granted granted Critical
Publication of FR580581A publication Critical patent/FR580581A/fr
Expired 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
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
FR580581D 1924-04-23 1924-04-23 Purificateur de son Expired FR580581A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR580581T 1924-04-23

Publications (1)

Publication Number Publication Date
FR580581A true FR580581A (fr) 1924-11-10

Family

ID=8956888

Family Applications (1)

Application Number Title Priority Date Filing Date
FR580581D Expired FR580581A (fr) 1924-04-23 1924-04-23 Purificateur de son

Country Status (3)

Country Link
US (1) US1620367A (fr)
FR (1) FR580581A (fr)
GB (1) GB232965A (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2849533A (en) * 1951-12-12 1958-08-26 Dictaphone Corp Headphone device
US3366748A (en) * 1964-09-22 1968-01-30 Artnell Company Loudspeaker diaphragm and driver
BR112015023798B1 (pt) 2013-03-15 2021-07-13 Scorrboard, Llc Método para criar uma modificação nivelada em um papelão ondulado
US11420417B2 (en) 2013-03-15 2022-08-23 Scorrboard Llc Methods and apparatus for producing scored mediums, and articles and compositions resulting therefrom
US10328654B2 (en) 2016-04-20 2019-06-25 Scorrboard, Llc System and method for producing a multi-layered board having a medium with improved structure
US11027515B2 (en) 2016-04-20 2021-06-08 Scorrboard Llc System and method for producing multi-layered board having at least three mediums with at least two mediums being different
US11027513B2 (en) 2016-04-20 2021-06-08 Scorrboard Llc System and method for producing an articulating board product having a facing with score lines in register to fluting
US10800133B2 (en) 2016-04-20 2020-10-13 Scorrboard, Llc System and method for producing a facing for a board product with strategically placed scores

Also Published As

Publication number Publication date
GB232965A (en) 1925-08-13
US1620367A (en) 1927-03-08

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