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Understanding Reverberation
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Reverberation Time (RT60)
RT60 is the time it takes for the reverberation to decay by 60 dB. It's crucial in designing spaces with the desired acoustics and adjusting reverb effects in production for naturalness.
Room Modes
Room modes are the resonant frequencies specific to a room's dimensions where standing waves can occur. These need to be controlled for balanced reverb and room acoustics.
Wet/Dry Mix
The wet/dry mix is the balance between the processed (wet) and unprocessed (dry) signals. It's adjusted to blend the reverb effect naturally into the mix.
Reverb Decay Curve
The reverb decay curve describes how the amplitude of the reverb tail decreases over time. It's used to design the fade-out characteristic of a reverberation effect.
Impulse Response (IR)
An impulse response is a recording of the reverb that occurs in a space when subjected to an idealized 'impulse'. IRs are used in convolution reverbs to emulate specific spaces.
Damping
Damping refers to the reduction of reverb in certain frequency ranges. It's used to tailor the reverb character in a mix by reducing muddiness or brightness.
Absorption Coefficient
The absorption coefficient is a measure of how much sound is absorbed by a material, as opposed to being reflected. It is used in selecting materials for acoustic treatment.
Modulation
Modulation in reverb applies varying changes to delay lines. This creates a more complex and less mechanical-sounding reverb by simulating the random fluctuations in natural environments.
Diffusion
Diffusion is the spreading of sound waves in many directions caused by reflective surfaces. It's used in acoustic treatment of rooms and in algorithms of reverb processors to create a sense of space.
Convolution Reverb
Convolution reverb uses impulse responses to digitally replicate the reverb of real spaces. It is used widely in post-production to bring realistic reverb effects.
Pre-Delay
Pre-Delay is the time between the direct sound and the onset of reverberation. It affects the perceived size of the room and helps to separate the source from the reverb tail in a mix.
Delay Lines
In digital reverbs, delay lines are used to simulate the echo effects that occur in natural reverb. They are the primary components in creating the initial delay and reverb decay.
Reverb Tail
The reverb tail is the prolonged echo that follows the initial reflections and slowly decays. It contributes to the ambiance and sustain in a mix.
Early Reflections
Early reflections are the first set of echoes that reach the listener shortly after the direct sound. They help in perceiving the size of the space and the distance of the sound source.
Direct Sound
Direct sound is the sound that travels straight from the source to the listener without any reflections. It is crucial in sound localization and clarity within a mix.
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