NL7207928A - - Google Patents

Info

Publication number
NL7207928A
NL7207928A NL7207928A NL7207928A NL7207928A NL 7207928 A NL7207928 A NL 7207928A NL 7207928 A NL7207928 A NL 7207928A NL 7207928 A NL7207928 A NL 7207928A NL 7207928 A NL7207928 A NL 7207928A
Authority
NL
Netherlands
Application number
NL7207928A
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 filed Critical
Publication of NL7207928A publication Critical patent/NL7207928A/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
    • H04R1/22—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)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
NL7207928A 1971-06-09 1972-06-09 NL7207928A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2569671 1971-06-09

Publications (1)

Publication Number Publication Date
NL7207928A true NL7207928A (fr) 1972-12-12

Family

ID=11217467

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7207928A NL7207928A (fr) 1971-06-09 1972-06-09

Country Status (5)

Country Link
CH (1) CH551124A (fr)
DE (1) DE2228827C2 (fr)
ES (1) ES181623Y (fr)
FR (1) FR2143715B3 (fr)
NL (1) NL7207928A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1592246A (en) * 1976-09-23 1981-07-01 Isaac T P Sound projection system
FR2495423B1 (fr) * 1980-11-28 1989-11-10 Topalian Daniel Enceinte acoustique a pavillon double avant non replie, et caisson ferme arriere

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE522584A (fr) * 1952-09-11

Also Published As

Publication number Publication date
FR2143715A1 (fr) 1973-02-09
DE2228827C2 (de) 1983-12-01
DE2228827A1 (de) 1973-01-25
ES181623U (es) 1973-04-01
FR2143715B3 (fr) 1975-08-08
CH551124A (it) 1974-06-28
ES181623Y (es) 1974-03-16

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Legal Events

Date Code Title Description
BB A search report has been drawn up
BC A request for examination has been filed
BN A decision not to publish the application has become irrevocable