Acoustic_Design Flashcards
(29 cards)
What is the primary goal of acoustic planning in architecture?
To manage sound transmission, reverberation, and impact across spaces.
How do materials affect sound in a space?
By influencing sound absorption, reflection, and transmission.
Why is separation between materials important for acoustics?
It reduces vibration transmission and improves sound isolation.
What is the purpose of using Z-channels in wall construction?
To reduce vibration transmission from drywall into studs.
Why are multiple layers of drywall used in acoustic walls?
To increase mass and dampen sound transmission.
How can massiveness of a material affect sound?
It can deaden or transmit sound, depending on the frequency.
Why can small mechanical systems cause large acoustic issues?
Vibrations can transfer through structural elements and propagate sound.
What solved the pump noise issue in the concrete loft building example?
Installing isolators (rubber gaskets) to absorb vibrations.
What is ‘live’ sound?
Sound with many reflections, causing reverberation.
What is ‘dead’ sound?
Sound with minimal reflections and more absorption.
Why do people sound better singing in the shower?
Hard surfaces cause reverberation, enhancing sound.
Why is a live room bad for lectures?
Reverberation makes it hard to distinguish spoken words.
Why is acoustic treatment critical in multipurpose spaces?
They must balance live and dead sound for both music and speech.
What architectural strategy can help balance live and dead sound?
Movable panels to adjust reflectivity and absorption.
What does STC stand for?
Sound Transmission Class.
What does NRC stand for?
Noise Reduction Coefficient.
What does IIC stand for?
Impact Insulation Class.
What does the STC rating measure?
Transmission of sound through assemblies like walls, doors, or floors.
What STC rating is considered poor for walls?
Low 40s.
What STC rating is considered good?
Above 50; 60+ is excellent.
What is STC primarily concerned with?
Human voice frequency range.
What does the NRC rating measure?
Material’s ability to absorb sound and reduce reverberation.
Where is NRC most often applied?
Ceiling materials in open offices or classrooms.
What does IIC measure?
The ability of a floor assembly to reduce impact sound transmission.
