Mode canceling composite panel for greater than mass-law transmi

Details Mode canceling composite panel for greater than mass-law transmi Mode canceling composite panel for greater than mass-law transmi

1976-07-29

1978-08-15

Tomsky, Stephen J.

Acoustics

Sound-modifying means

Sound absorbing panels

181286, 181291, 181294, E04B 199, G10K 1104

Patent

active

041065883

ABSTRACT:
A composite panel is described in which the face sheets and the core have properties such that the panel produces a double wall resonance near the low frequency end of the principal speech bands and in which the panel produces interaction between the symmetric and antisymmetric mode in the principal speech bands, thereby providing greater than mass-law transmission loss over a substantial portion of the audio frequency spectrum. At frequencies above the principal speech bands effects are determined primarily by the properties of the individual face sheets.

REFERENCES:
patent: 2744044 (1956-05-01), Toulmin, Jr.
patent: 3041219 (1962-06-01), Steck
patent: 3124639 (1964-03-01), Kahn
patent: 3274046 (1966-09-01), Shannon et al.
patent: 3822764 (1974-07-01), Val
patent: 3960236 (1976-06-01), Holmes
patent: 3985198 (1976-10-01), Kurtze et al.

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