Sound Absorption Coefficient Measurement
topic
The impedance tube method (Kundt tube) measures normal-incidence sound absorption coefficient of small fabric specimens by analysing the standing wave ratio from microphone measurements at two positions, while reverberation room methods measure random-incidence absorption coefficient from decay rate differences with and without specimens across octave band frequencies.
Role
Provides the absorption coefficient spectrum used in room acoustic design calculations for architectural textiles including upholstered wall panels, woven ceiling baffles, and acoustic curtains, enabling specification of textile products that meet building regulation noise control requirements.
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