BE374446A - - Google Patents

Info

Publication number
BE374446A
BE374446A BE374446DA BE374446A BE 374446 A BE374446 A BE 374446A BE 374446D A BE374446D A BE 374446DA BE 374446 A BE374446 A BE 374446A
Authority
BE
Belgium
Prior art keywords
sound
improving
resonator
december
present
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE374446A publication Critical patent/BE374446A/fr

Links

Classifications

    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/08Non-electric sound-amplifying devices, e.g. non-electric megaphones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
BE374446D BE374446A (enrdf_load_html_response)

Publications (1)

Publication Number Publication Date
BE374446A true BE374446A (enrdf_load_html_response)

Family

ID=45215

Family Applications (1)

Application Number Title Priority Date Filing Date
BE374446D BE374446A (enrdf_load_html_response)

Country Status (1)

Country Link
BE (1) BE374446A (enrdf_load_html_response)

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