CH469421A - Electrodynamic acoustic transducer, in particular an earpiece - Google Patents

Electrodynamic acoustic transducer, in particular an earpiece

Info

Publication number
CH469421A
CH469421A CH1039868A CH1039868A CH469421A CH 469421 A CH469421 A CH 469421A CH 1039868 A CH1039868 A CH 1039868A CH 1039868 A CH1039868 A CH 1039868A CH 469421 A CH469421 A CH 469421A
Authority
CH
Switzerland
Prior art keywords
earpiece
acoustic transducer
electrodynamic acoustic
electrodynamic
transducer
Prior art date
Application number
CH1039868A
Other languages
German (de)
Inventor
Schramm Karl
Original Assignee
Krone Kg
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 by Krone Kg filed Critical Krone Kg
Publication of CH469421A publication Critical patent/CH469421A/en

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 
    • H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for telephonic receivers
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P7/00—Preparation of oxygen-containing organic compounds
    • C12P7/40—Preparation of oxygen-containing organic compounds containing a carboxyl group including Peroxycarboxylic acids
    • C12P7/44—Polycarboxylic acids
    • C12P7/48—Tricarboxylic acids, e.g. citric acid
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/10—Telephone receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Zoology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microbiology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biotechnology (AREA)
  • Otolaryngology (AREA)
  • Biochemistry (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Genetics & Genomics (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
CH1039868A 1967-07-26 1968-07-11 Electrodynamic acoustic transducer, in particular an earpiece CH469421A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1537627 1967-07-26

Publications (1)

Publication Number Publication Date
CH469421A true CH469421A (en) 1969-02-28

Family

ID=5675933

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1039868A CH469421A (en) 1967-07-26 1968-07-11 Electrodynamic acoustic transducer, in particular an earpiece

Country Status (3)

Country Link
CH (1) CH469421A (en)
FR (1) FR1573665A (en)
GB (1) GB1223728A (en)

Also Published As

Publication number Publication date
FR1573665A (en) 1969-05-27
GB1223728A (en) 1971-03-03

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