BE441671A - - Google Patents

Info

Publication number
BE441671A
BE441671A BE441671DA BE441671A BE 441671 A BE441671 A BE 441671A BE 441671D A BE441671D A BE 441671DA BE 441671 A BE441671 A BE 441671A
Authority
BE
Belgium
Application number
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.)
Publication of BE441671A publication Critical patent/BE441671A/xx

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/20Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22Arrangements 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)
  • Piezo-Electric Transducers For Audible Bands (AREA)
BE441671D 1941-09-05 BE441671A (hr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US409712A US2971597A (en) 1941-09-05 1941-09-05 Electro-acoustic devices

Publications (1)

Publication Number Publication Date
BE441671A true BE441671A (hr)

Family

ID=23621675

Family Applications (1)

Application Number Title Priority Date Filing Date
BE441671D BE441671A (hr) 1941-09-05

Country Status (2)

Country Link
US (1) US2971597A (hr)
BE (1) BE441671A (hr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3079471A (en) * 1961-03-01 1963-02-26 Ampex Loudspeaker
US3198890A (en) * 1961-06-14 1965-08-03 Rosen Alfred H High fidelity sound reproducer
US3632902A (en) * 1969-02-24 1972-01-04 John J Wahler Sound reflector-modifier for hearing aid microphones
JP2006174077A (ja) * 2004-12-15 2006-06-29 Sony Corp スピーカ装置
GB2426405B (en) * 2005-05-21 2008-02-27 Sonaptic Ltd Miniature planar acoustic networks

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1841101A (en) * 1930-03-06 1932-01-12 Bell Telephone Labor Inc Loud speaker
US1901388A (en) * 1930-04-18 1933-03-14 Rca Corp Method and apparatus for eliminating the effect of cabinet resonance
US1869178A (en) * 1930-08-15 1932-07-26 Bell Telephone Labor Inc Sound translating device
US1969704A (en) * 1932-06-03 1934-08-07 D Alton Andre Acoustic device
US2097289A (en) * 1934-12-20 1937-10-26 Rca Corp Acoustic apparatus
US2065751A (en) * 1935-12-31 1936-12-29 Rca Corp Acoustic resistance device
US2224919A (en) * 1937-03-31 1940-12-17 Rca Corp Loud-speaker
US2252846A (en) * 1938-09-30 1941-08-19 Associated Electric Lab Inc Acoustic device

Also Published As

Publication number Publication date
US2971597A (en) 1961-02-14

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