NL23978C - - Google Patents

Info

Publication number
NL23978C
NL23978C NL23978DA NL23978C NL 23978 C NL23978 C NL 23978C NL 23978D A NL23978D A NL 23978DA NL 23978 C NL23978 C NL 23978C
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 NL23978C publication Critical patent/NL23978C/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
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
    • 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 
    • H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns

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)
NL23978D 1926-06-16 NL23978C (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US116251A US1684975A (en) 1926-06-16 1926-06-16 Sound-generating device

Publications (1)

Publication Number Publication Date
NL23978C true NL23978C (xx)

Family

ID=22366087

Family Applications (1)

Application Number Title Priority Date Filing Date
NL23978D NL23978C (xx) 1926-06-16

Country Status (2)

Country Link
US (1) US1684975A (xx)
NL (1) NL23978C (xx)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458038A (en) * 1942-08-29 1949-01-04 Rca Corp Acoustical apparatus
US2435535A (en) * 1944-01-10 1948-02-03 Eaves Sound Projectors Inc Sound projecting apparatus
JP2945983B2 (ja) * 1987-03-25 1999-09-06 久次 中村 スピーカ装置
US5109423A (en) * 1988-06-30 1992-04-28 Jacobson Larry L Audio system with amplifier and signal device
US5004067A (en) * 1988-06-30 1991-04-02 Patronis Eugene T Cinema sound system for unperforated screens
US5125732A (en) * 1988-06-30 1992-06-30 Jacobson Larry L Motion picture exhibition facility

Also Published As

Publication number Publication date
US1684975A (en) 1928-09-18

Similar Documents

Publication Publication Date Title
AT109105B (xx)
AT112305B (xx)
AT112354B (xx)
BE332825A (xx)
BE332329A (xx)
BE333319A (xx)
BE270782A (xx)
BE287588A (xx)
BE331237A (xx)
BE331574A (xx)
BE331576A (xx)
BE331638A (xx)
BE331639A (xx)
BE331680A (xx)
BE331706A (xx)
BE331764A (xx)
BE331789A (xx)
BE331886A (xx)
BE332000A (xx)
BE332091A (xx)
BE332097A (xx)
BE332179A (xx)
BE332307A (xx)
NL23978C (xx)
BE332378A (xx)