DE133386C - - Google Patents

Info

Publication number
DE133386C
DE133386C DENDAT133386D DE133386DA DE133386C DE 133386 C DE133386 C DE 133386C DE NDAT133386 D DENDAT133386 D DE NDAT133386D DE 133386D A DE133386D A DE 133386DA DE 133386 C DE133386 C DE 133386C
Authority
DE
Germany
Prior art keywords
sound
grooves
cover
sound cover
wall
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
DENDAT133386D
Other languages
German (de)
English (en)
Publication of DE133386C publication Critical patent/DE133386C/de
Active legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H04R1/083—Special constructions of mouthpieces

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
DENDAT133386D Active DE133386C (ca)

Publications (1)

Publication Number Publication Date
DE133386C true DE133386C (ca)

Family

ID=401590

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT133386D Active DE133386C (ca)

Country Status (1)

Country Link
DE (1) DE133386C (ca)

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