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Absorbs sound energy and converts it into heat, reducing the amount of reflected sound and echo.

Contain and absorb sound at the source to keep it from spreading to the surrounding environment.

The principle that increasing the mass of a barrier improves its sound isolation properties, attributable to the law of mass action.

Blocks the transmission of sound through structures by creating a barrier that reflects or absorbs sound waves.

Reduces noise transmission through windows using multiple glass panes and air gaps.

Masks unwanted sounds by producing a background noise that is a mix of all audible frequencies at equal intensity.

Plants and earth mounds can help absorb and deflect sound away from sensitive areas.

Prevents vibrations from reaching a sensitive object by using isolators or mounts that decouple the object from the vibration source.

Porous materials that trap sound waves, converting the sound energy into heat through friction.

Artificial structures made of periodic arrays that can control sound waves through Bragg scattering.

Acts as a sound barrier and reduces the impact noise and vibration transmission between floors.

Scatter sound waves, spreading them out to prevent focus points of noise and reduce echoes.

Reflects sound waves away from the protected area, effectively redirecting the noise.

A layer of vegetation on a roof can absorb, deflect, and reduce sound propagation.

Reduces the transmission of vibration from a source by using materials or systems that absorb vibrational energy.

Involves designing machinery or equipment to operate more quietly, by minimizing noise at the source.

Use active noise control to cancel out external noise by emitting an inverse sound wave that destructively interferes with the noise.

Designed to target and absorb specific frequencies based on the principle of resonant frequency absorption.

Suspended elements that absorb sound, reducing noise levels and reverberation in large enclosed spaces.