NL97567C - - Google Patents

Info

Publication number
NL97567C
NL97567C NL97567DA NL97567C NL 97567 C NL97567 C NL 97567C NL 97567D A NL97567D A NL 97567DA NL 97567 C NL97567 C NL 97567C
Authority
NL
Netherlands
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 NL97567C publication Critical patent/NL97567C/xx

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
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/323—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only for loudspeakers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
NL97567D 1953-10-02 NL97567C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE788934X 1953-10-02

Publications (1)

Publication Number Publication Date
NL97567C true NL97567C (en)

Family

ID=20336876

Family Applications (2)

Application Number Title Priority Date Filing Date
NL191082D NL191082B (en) 1953-10-02 Implantable automatic cardioverter / defibrillator system.
NL97567D NL97567C (en) 1953-10-02

Family Applications Before (1)

Application Number Title Priority Date Filing Date
NL191082D NL191082B (en) 1953-10-02 Implantable automatic cardioverter / defibrillator system.

Country Status (4)

Country Link
US (1) US2979149A (en)
FR (1) FR1118760A (en)
GB (1) GB788934A (en)
NL (2) NL97567C (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL298920A (en) * 1962-10-12
SE387512B (en) * 1973-08-24 1976-09-06 S Carlsson SPEAKERS FOR STEROPHONIC SOUND DETERMINATION SYSTEM, AND TWO SUCH SPEAKERS EXISTING SPEAKERS
JP2823157B2 (en) * 1986-04-01 1998-11-11 キヤノン株式会社 Audio output system
GB2230408A (en) * 1989-03-17 1990-10-17 Dimitris Lioupis Loudspeakers
US8634586B2 (en) * 2009-06-26 2014-01-21 Polk Audio, Inc. Ceiling-mounted loudspeaker enclosure
US8066095B1 (en) * 2009-09-24 2011-11-29 Nicholas Sheppard Bromer Transverse waveguide
US8867749B2 (en) 2011-04-18 2014-10-21 Paul Blair McGowan Acoustic spatial projector

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2065367A (en) * 1935-12-31 1936-12-22 Robert B Evans Sound diffusing apparatus
US2206427A (en) * 1937-03-31 1940-07-02 Rca Corp Sound reproducing apparatus
US2143175A (en) * 1937-10-23 1939-01-10 Samuel A Waite Sound reproducing system
US2179840A (en) * 1938-05-03 1939-11-14 Frida Bucky Loudspeaker arrangement
US2373692A (en) * 1942-10-03 1945-04-17 Ray L Smith Loud-speaker
CH248861A (en) * 1944-05-30 1947-05-31 Philips Nv Stereophonic player.
FR913655A (en) * 1945-03-22 1946-09-17 Improvements to electrical sound reproducing devices such as radio receivers and phonographs
FR54541E (en) * 1946-05-09 1950-05-04 Improvements to electrical sound reproducing devices such as radio receivers and phonographs
BE478613A (en) * 1946-09-20
US2722990A (en) * 1949-11-08 1955-11-08 Decca Record Co Ltd Loudspeaker assemblies
US2694462A (en) * 1951-09-19 1954-11-16 Robbins Frank Acoustic system for loud-speakers
US2701025A (en) * 1952-02-05 1955-02-01 George H Kuhl High fidelity sound system
US2824617A (en) * 1952-09-15 1958-02-25 Philips Corp Sound reproducing device

Also Published As

Publication number Publication date
US2979149A (en) 1961-04-11
FR1118760A (en) 1956-06-11
NL191082B (en)
GB788934A (en) 1958-01-08

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