FR2422314A1 - Procede et dispositif de definition des caracteristiques d'un plasma dans l'air - Google Patents

Procede et dispositif de definition des caracteristiques d'un plasma dans l'air

Info

Publication number
FR2422314A1
FR2422314A1 FR7908525A FR7908525A FR2422314A1 FR 2422314 A1 FR2422314 A1 FR 2422314A1 FR 7908525 A FR7908525 A FR 7908525A FR 7908525 A FR7908525 A FR 7908525A FR 2422314 A1 FR2422314 A1 FR 2422314A1
Authority
FR
France
Prior art keywords
plasma
air
energy
sound
defining
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
FR7908525A
Other languages
English (en)
Other versions
FR2422314B1 (fr
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
Publication of FR2422314A1 publication Critical patent/FR2422314A1/fr
Application granted granted Critical
Publication of FR2422314B1 publication Critical patent/FR2422314B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K7/00—Sirens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/32—Gas-filled discharge tubes
    • H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
    • H01J37/32055—Arc discharge
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/46—Generating plasma using applied electromagnetic fields, e.g. high frequency or microwave energy

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Electromagnetism (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Plasma Technology (AREA)

Abstract

L'invention concerne la génération d'énergie sonore. Pour produire de l'énergie sonore, on engendre un plasma dans l'air, et on applique de l'énergie thermique à ce plasma de façon à former des gradients thermiques et des gradients de densité dans la région frontière du plasma, contiguë à l'air ambiant Cette énergie thermique est obtenue à l'aide d'un champ électrique qui est modulé par une source de signal audiofréquence 32, de façon à émettre dans l'air des ondes sonores qui correspondent au signal de la source 32. Application à la reproduction sonore de haute fidélité.
FR7908525A 1978-04-05 1979-04-04 Procede et dispositif de definition des caracteristiques d'un plasma dans l'air Granted FR2422314A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/893,667 US4219705A (en) 1978-04-05 1978-04-05 Sound production using large volume plasmas

Publications (2)

Publication Number Publication Date
FR2422314A1 true FR2422314A1 (fr) 1979-11-02
FR2422314B1 FR2422314B1 (fr) 1984-03-09

Family

ID=25401888

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7908525A Granted FR2422314A1 (fr) 1978-04-05 1979-04-04 Procede et dispositif de definition des caracteristiques d'un plasma dans l'air

Country Status (6)

Country Link
US (1) US4219705A (fr)
JP (2) JPS54143225A (fr)
CA (1) CA1146258A (fr)
DE (1) DE2913804C2 (fr)
FR (1) FR2422314A1 (fr)
GB (1) GB2023373B (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145310B (en) * 1981-03-19 1985-11-20 Loughborough Consult Ltd Generating a plurality of electric discharges, plasma torches
DE19548882C2 (de) * 1995-12-29 2000-04-06 Peus Systems Gmbh Vorrichtung zur zeitlich hochauflösenden Messung des Volumenstromes eines flüssigen oder gasförmigen Mediums in einem von diesem durchströmten Rohr
US6257365B1 (en) * 1996-08-30 2001-07-10 Mediaphile Av Technologies, Inc. Cone reflector/coupler speaker system and method
GB2403372B (en) * 2003-06-21 2007-03-21 Adam Richard Maurice Chambers Loudspeaker
FR2861184B1 (fr) * 2003-10-17 2006-01-13 Eppra Procede de generation d'un rayonnement de longueurs d'onde desirees, et dispositif associe
DE102005047079A1 (de) * 2005-09-30 2007-04-05 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Entladungslampe mit innenliegenden Elektrodenpaaren
WO2009104059A1 (fr) * 2008-02-19 2009-08-27 Nano-Uv Multiplexage de sources pulsées
KR102033909B1 (ko) * 2012-11-16 2019-10-18 에너지 리퍼블릭 주식회사 다중 발라스터 모듈을 포함하는 플라즈마 처리 장치
DE102013110266A1 (de) * 2013-09-18 2015-04-16 Hegwein GmbH Vorrichtung und Verfahren zur Überwachung eines Plasmabrenners
CN103634728A (zh) * 2013-12-13 2014-03-12 韦威 一种等离子扬声器
DE102014205695B4 (de) * 2014-03-27 2016-01-28 Christof-Herbert Diener Niederdruckplasmaanlage mit sequentieller Steuerung
GB2573570A (en) * 2018-05-11 2019-11-13 Univ Southampton Hollow cathode apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3185778A (en) * 1962-05-01 1965-05-25 Giannini Scient Corp Apparatus for producing sound
US3565209A (en) * 1968-02-28 1971-02-23 United Aircraft Corp Method and apparatus for generating an acoustic output from an ionized gas stream

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB303175A (en) * 1927-12-29 1930-01-30 Siegmund Loewe Loudspeaker arrangement
US2403990A (en) * 1942-08-01 1946-07-16 Bell Telephone Labor Inc Compressional wave radiator
US2483768A (en) * 1944-06-15 1949-10-04 Rca Corp Microwave-acoustic wave translator
GB659796A (en) * 1945-03-01 1951-10-31 Klein Siegfried Method and device for transforming waves of audible, ultra-audible or infra-audible frequencies into modulations of an electric current, and conversely
US2863033A (en) * 1954-11-29 1958-12-02 Gen Electric Temperature detector and method of making
US3022385A (en) * 1958-08-25 1962-02-20 Takis N Panay Sound producer
US3230506A (en) * 1962-02-26 1966-01-18 Mhd Res Inc Pressure pulsation generator
US3286226A (en) * 1965-01-18 1966-11-15 Edgerton Germeshausen & Grier Underwater spark discharge sound-producing system
US3371309A (en) * 1965-06-10 1968-02-27 Navy Usa Thermo-mechanical transducer
US3476887A (en) * 1966-04-26 1969-11-04 Arnold L Seligson Ionic electro-acoustic transducer
US3518462A (en) * 1967-08-21 1970-06-30 Guidance Technology Inc Fluid flow control system
US3516286A (en) * 1967-10-16 1970-06-23 United Aircraft Corp Method and apparatus for generating an acoustic output from an ionized gas stream
CA871894A (en) * 1968-08-02 1971-05-25 Canadian Titanium Pigments Limited Plasma arc heating apparatus
JPS5120020B2 (fr) * 1971-09-10 1976-06-22
JPS5168788A (en) * 1974-12-12 1976-06-14 Kazuo Akashi Koshuhapurazumaenno hatsuseihoho

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3185778A (en) * 1962-05-01 1965-05-25 Giannini Scient Corp Apparatus for producing sound
US3565209A (en) * 1968-02-28 1971-02-23 United Aircraft Corp Method and apparatus for generating an acoustic output from an ionized gas stream

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, vol. 43, no. 6, juin 1968, New York (US) *

Also Published As

Publication number Publication date
GB2023373A (en) 1979-12-28
DE2913804C2 (de) 1986-03-27
JPH0313800B2 (fr) 1991-02-25
GB2023373B (en) 1983-02-09
FR2422314B1 (fr) 1984-03-09
JPS54143225A (en) 1979-11-08
CA1146258A (fr) 1983-05-10
JPH02198300A (ja) 1990-08-06
US4219705A (en) 1980-08-26
DE2913804A1 (de) 1979-10-11

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Legal Events

Date Code Title Description
ST Notification of lapse