Question

Which of the following is a technique used to reduce echoes in large spaces in architectural acoustics?

• A. Installing reflective surfaces
• B. Using sound-absorbing materials
• C. Increasing the volume of the space
• D. Removing all barriers

Answer 1

The Correct Option is B

Echoes occur in large spaces when sound waves reflect off surfaces and return to the listener, causing a repeated sound. Reducing echoes is an important aspect of architectural acoustics, especially in auditoriums, concert halls, and large meeting rooms. 

• Option 1: Installing reflective surfaces - Reflective surfaces increase the chances of sound waves bouncing around the space, thereby increasing echoes. This option would typically make the problem worse, not better.
• Option 2: Using sound-absorbing materials - This is the correct technique. Sound-absorbing materials such as acoustic panels, carpeting, and fabric-covered surfaces reduce the reflection of sound waves, minimizing echoes. These materials absorb sound energy, preventing it from reflecting back into the space.
• Option 3: Increasing the volume of the space - Increasing the volume of a space may make the space sound less congested but does not directly address the problem of echoes. Larger spaces can sometimes amplify echoes if not properly treated.
• Option 4: Removing all barriers - Removing barriers may create a more open environment, but it does not necessarily solve the problem of echoes. In fact, removing barriers can increase the distance over which sound waves travel, potentially leading to more pronounced echoes.

Conclusion:

The most effective technique to reduce echoes in large spaces is Using sound-absorbing materials as they absorb sound energy and prevent reflections.

Answer:

Option 2: Using sound-absorbing materials

Research