Megaphone

Details Megaphone Megaphone

1995-03-02

1997-05-20

Dang, Khanh

Acoustics

Sound-modifying means

Intensifying horn

181190, 181192, 181182, G10K 1100

Patent

active

056314507

ABSTRACT:
A megaphone includes a pair of hollow bodies which are assembled at a connecting portion to open and close freely, wherein a tuning part is formed by denting the center of a flat part of each hemiconical main part to provide a level face around the tuning part.

REFERENCES:
patent: 4703829 (1987-11-01), Hardt
patent: 5094317 (1992-03-01), Ladendorf
patent: 5160815 (1992-11-01), Prater

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