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Acoustic Treatment
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Flashcards
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Absorption
Reduces reverberation and echo by converting sound energy into heat. Example: Acoustic foam panels in a recording studio.
Diffusion
Scatters sound waves to reduce standing waves and flutter echoes. Example: Diffuser panels on a studio's rear wall.
Room Modes
Resonant frequencies that emphasize or attenuate certain frequencies due to room dimensions. Example: Can be minimized with bass traps and proper room dimension ratios.
Decoupling
Mechanically separating two structures to reduce the transmission of sound. Example: Floating floors or walls in a studio to prevent structure-borne noise.
Comb Filtering
An effect caused by delayed reflections combining with the direct sound, creating peaks and troughs in frequency response. Example: Speaker placement and treatment of first reflection points can manage this issue.
Helmholtz Resonator
A device built to target and absorb specific frequencies. Example: Tuned to absorb problematic room modes in a studio or concert hall.
Soundproofing
Preventing sound from entering or exiting a space. Example: Use of dense materials and isolation techniques to prevent sound leakage in a recording studio.
Reverberation Time (RT60)
The time it takes for the sound to decay by 60 dB in a space. Example: Measured to tune room acoustics for the desired sound character.
Standing Waves
Resonances that occur at specific frequencies between parallel surfaces, leading to acoustic issues. Example: Can be reduced using diffusion or bass traps.
Bass Traps
Controls low-frequency sound to prevent bass build-up in corners. Example: Triangular panels placed in room corners.
Reflection Points
Areas where direct sound is reflected back to the listener's ears. Example: Side walls near the listening position are often treated with absorption panels.
Flutter Echo
Rapid, repetitive echoes caused by parallel reflective surfaces. Example: Can be reduced by adding absorption or diffusion at reflective points.
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