DE275785C - - Google Patents

Info

Publication number
DE275785C
DE275785C DENDAT275785D DE275785DA DE275785C DE 275785 C DE275785 C DE 275785C DE NDAT275785 D DENDAT275785 D DE NDAT275785D DE 275785D A DE275785D A DE 275785DA DE 275785 C DE275785 C DE 275785C
Authority
DE
Germany
Prior art keywords
funnel
housing
wall
sound
speaking
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
DENDAT275785D
Other languages
German (de)
English (en)
Publication of DE275785C publication Critical patent/DE275785C/de
Active legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
    • G11B25/04—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
DENDAT275785D Active DE275785C (cs)

Publications (1)

Publication Number Publication Date
DE275785C true DE275785C (cs)

Family

ID=532043

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT275785D Active DE275785C (cs)

Country Status (1)

Country Link
DE (1) DE275785C (cs)

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