Vibrating diaphragm type audible device with acoustically improv

Details Vibrating diaphragm type audible device with acoustically improv Vibrating diaphragm type audible device with acoustically improv

1982-12-27

1985-07-16

Griffin, Donald A.

Acoustics

Diaphragm and enclosure

181157, H05K 500

Patent

active

045290598

ABSTRACT:
An audible device of the vibrating diaphragm type which has improved acoustical performance by reducing the open area of the acoustical wave egress port. Through use of a masked grille having a small percentage of open grille space it is possible to improve the performance of a vibrating diaphragm type audible device such as a vibratory horn by increasing its energy transfer or acoustical output.

REFERENCES:
patent: 1097499 (1914-05-01), Young
patent: 1587096 (1926-06-01), Wheeler
patent: 2131593 (1938-09-01), Marshall
patent: 2890297 (1959-06-01), Lehr
patent: 3424850 (1969-01-01), Southard et al.
patent: 3716671 (1973-02-01), Karr
patent: 3952834 (1976-04-01), Soma et al.
patent: 4424881 (1984-01-01), Hattori

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