using resonance effects

Full Title

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 > Methods or devices for protecting against, or for damping, noise or other acoustic waves in general > using resonance effects

Classification Context

Section:

PHYSICS

Class:

MUSICAL INSTRUMENTS; ACOUSTICS

Subclass:

SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR