NL77682C - - Google Patents

Info

Publication number
NL77682C
NL77682C NL77682DA NL77682C NL 77682 C NL77682 C NL 77682C NL 77682D A NL77682D A NL 77682DA NL 77682 C NL77682 C NL 77682C
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 NL77682C publication Critical patent/NL77682C/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
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/36—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means by using a single aperture of dimensions not greater than the shortest operating wavelength

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)
  • Diaphragms For Electromechanical Transducers (AREA)
NL77682D 1947-09-10 NL77682C (en:Method)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB283814X 1947-09-10

Publications (1)

Publication Number Publication Date
NL77682C true NL77682C (en:Method)

Family

ID=10274751

Family Applications (1)

Application Number Title Priority Date Filing Date
NL77682D NL77682C (en:Method) 1947-09-10

Country Status (7)

Country Link
US (1) US2646851A (en:Method)
BE (2) BE484735A (en:Method)
CH (1) CH283814A (en:Method)
DE (1) DE944860C (en:Method)
FR (1) FR971128A (en:Method)
GB (1) GB659063A (en:Method)
NL (1) NL77682C (en:Method)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2694462A (en) * 1951-09-19 1954-11-16 Robbins Frank Acoustic system for loud-speakers
US2694463A (en) * 1952-04-07 1954-11-16 Robbins Frank Acoustic system for loud-speakers
US2787332A (en) * 1952-09-06 1957-04-02 Norman C Fulmer Loud-speaker system
DE1130472B (de) * 1957-11-22 1962-05-30 Philco Corp Lautsprechermembran
US3146848A (en) * 1958-08-25 1964-09-01 John O Fundingsland Hi-fidelity speaker
GB1557879A (en) * 1976-12-03 1979-12-12 Rank Organisation Ltd Electro acoustic transducers
US4207963A (en) * 1978-12-11 1980-06-17 Integrated Sound Systems Inc. Loudspeaker system
DE3407980A1 (de) * 1983-04-20 1984-10-25 Tadashi Tokio/Tokyo Sawafuji Kristallschallerzeuger
CA1271247A (en) * 1987-01-14 1990-07-03 Gerard S. Mindel Load and dispersion cell for sound
FR2649572B1 (fr) * 1989-07-07 1991-09-20 Thomson Consumer Electronics Dispositif de reproduction sonore pour televiseurs
GB2425436B (en) * 2005-04-21 2007-06-06 Martin Audio Ltd Acoustic loading device for loudspeakers
US7520368B2 (en) * 2007-06-08 2009-04-21 Moore Dana A Horizontally folded reflex-ported bass horn enclosure
US7513332B2 (en) * 2007-09-12 2009-04-07 Moore Dana A Convertible folded horn enclosure with improved compactness

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US272866A (en) * 1883-02-27 Speaking-trumpet for receiving-telephones
US1616474A (en) * 1925-03-05 1927-02-08 Charles F Stehlin Tone-developing loud speaker
US1865735A (en) * 1929-04-01 1932-07-05 Rca Corp Sound reproducer
GB404937A (en) * 1932-07-14 1934-01-15 William Robertson Millar Improvements in sound-modifying devices for loud speakers or the like
FR791142A (fr) * 1934-09-06 1935-12-04 Dispositif protecteur et amplificateur de son pour hauts-parleurs de t. s. f.
US2214393A (en) * 1938-09-10 1940-09-10 Ingraham E Co Acoustical equalizer
US2373692A (en) * 1942-10-03 1945-04-17 Ray L Smith Loud-speaker

Also Published As

Publication number Publication date
GB659063A (en) 1951-10-17
FR971128A (fr) 1951-01-12
BE522721A (en:Method)
CH283814A (fr) 1952-06-30
BE484735A (en:Method)
US2646851A (en) 1953-07-28
DE944860C (de) 1956-06-28

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