Name two techniques to improve acoustics in a classroom as part of acoustical design.

• A. Absorptive materials and acoustic ceiling treatments.
• B. Relying on reflective metal surfaces to amplify sound.
• C. Relying solely on carpet to deaden sound.
• D. Ignoring sound control because acoustics are fixed.

Answer: (A)

Controlling how sound energy is absorbed and where it reflects is essential to classroom acoustics. Absorptive materials soak up sound waves, reducing reverberation and improving speech intelligibility; this includes acoustic panels on walls, insulation, and soft furnishings designed for sound control. Pairing that with acoustic ceiling treatments—porous ceiling tiles, clouds, or baffles—adds absorption overhead, further cutting echoes and flutter and helping voices carry evenly across the room. The result is a space where students can hear clearly without excessive noise. The other options miss the mark: reflective metal surfaces bounce sound and increase reflections, making speech harder to understand; relying only on carpet is not enough to achieve balanced acoustics; and assuming acoustics are fixed ignores the value of intentional design to improve them.