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The process of dampening sound energy by converting it to heat.

The scattering of sound waves, reducing the sense of directionality of the sound.

The time it takes for reverberated sound to decay by 60 decibels.

These are devices designed to capture low-frequency sound energy.

Resonant sound waves that reinforce or cancel each other, problematic at certain room dimensions.

A rating used to measure a material's ability to reduce sound transmission through it.

A unit of measurement for sound pressure level, logarithmic in nature.

The bouncing back of sound waves off surfaces.

A rapid series of echoes caused by sound bouncing between two parallel surfaces.

Frequencies at which standing waves cause resonant peaks and nulls in a room's acoustic response.

A type of acoustic treatment that uses a vibrating panel to absorb sound energy, especially effective for mid to low frequencies.

An acoustic device designed to absorb specific frequencies based on its cavity size, neck dimension, and amount of damping material.

The resistance a material provides to the transmission and reflection of sound waves.

A scalar representation of the amount of sound energy absorbed upon striking a material.