The sound absorption characteristics of a material are highly influenced by the frequency and direction of the sound waves. Materials often absorb higher frequencies more effectively, and the angle at which sound waves strike a surface can affect the absorption rate. Distance (Option A) and loudness (Option C) impact perceived sound levels but not absorption properties. Ambient sound (Option B) relates to background noise rather than material absorption.
CTS References: AVIXA CTS Exam Guide, Chapter on Acoustics; CTS Handbook, Section on Acoustic Properties of Materials and Room Treatments.
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