LU48744A1LU48744ALU48744ALU48744A1LU 48744 A1LU48744 A1LU 48744A1LU 48744 ALU48744 ALU 48744ALU 48744 ALU48744 ALU 48744ALU 48744 A1LU48744 A1LU 48744A1
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LU
Luxembourg
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LU48744A
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Priority to LU48744ApriorityCriticalpatent/LU48744A1/xx
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G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
G10K11/00—Methods 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
G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators