DE343082C - - Google Patents

Info

Publication number
DE343082C
DE343082C DENDAT343082D DE343082DA DE343082C DE 343082 C DE343082 C DE 343082C DE NDAT343082 D DENDAT343082 D DE NDAT343082D DE 343082D A DE343082D A DE 343082DA DE 343082 C DE343082 C DE 343082C
Authority
DE
Germany
Prior art keywords
room
sound
funnel
shut
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
DENDAT343082D
Other languages
German (de)
English (en)
Publication of DE343082C publication Critical patent/DE343082C/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
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F25/00—Audible advertising
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/02—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
    • G11B33/06—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon combined with other apparatus having a different main function

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
DENDAT343082D Active DE343082C (https=)

Publications (1)

Publication Number Publication Date
DE343082C true DE343082C (https=)

Family

ID=572561

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT343082D Active DE343082C (https=)

Country Status (1)

Country Link
DE (1) DE343082C (https=)

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