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→Methods of Isolation
Sound waves can be converted to heat energy by adding mass to surfaces. Vibrating a mass absorbs more of the sound energy.
Decoupling is achieved by using viscoelastic dampers between surfaces, and air gaps to prevent direct conduction. Air gaps need especial attention because they can resonate, especially at the lower frequency (1000-400 Hz) wavelengths of 13.5 to 33.76 in (34.3-85.75 cm). Resonance will transfer acoustical energy across the gap.
=== An Example ===