NL83991C - - Google Patents

Info

Publication number
NL83991C
NL83991C NL83991DA NL83991C NL 83991 C NL83991 C NL 83991C NL 83991D A NL83991D A NL 83991DA NL 83991 C NL83991 C NL 83991C
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 NL83991C publication Critical patent/NL83991C/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 

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)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Transducers For Ultrasonic Waves (AREA)
NL83991D 1952-04-03 NL83991C (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL726247X 1952-04-03

Publications (1)

Publication Number Publication Date
NL83991C true NL83991C (enrdf_load_stackoverflow)

Family

ID=19817821

Family Applications (1)

Application Number Title Priority Date Filing Date
NL83991D NL83991C (enrdf_load_stackoverflow) 1952-04-03

Country Status (5)

Country Link
US (1) US2778440A (enrdf_load_stackoverflow)
BE (1) BE518909A (enrdf_load_stackoverflow)
DE (1) DE931055C (enrdf_load_stackoverflow)
GB (1) GB726247A (enrdf_load_stackoverflow)
NL (1) NL83991C (enrdf_load_stackoverflow)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1488565A (en) * 1919-07-11 1924-04-01 George W Stewart Porous damper for acoustical instruments
US1975637A (en) * 1930-05-30 1934-10-02 Paraffine Co Inc Acoustical material
US1954966A (en) * 1931-01-31 1934-04-17 Bell Telephone Labor Inc Sound translating device
US2065751A (en) * 1935-12-31 1936-12-29 Rca Corp Acoustic resistance device
US2126254A (en) * 1936-12-23 1938-08-09 Ernest E Gowell Rug and method of making the same
US2656585A (en) * 1948-04-13 1953-10-27 Neisler Mills Inc Plied yarn and plied yarn fabric and method of making same

Also Published As

Publication number Publication date
BE518909A (enrdf_load_stackoverflow)
GB726247A (en) 1955-03-16
US2778440A (en) 1957-01-22
DE931055C (de) 1955-08-01

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