Selection and placement of microphones is critical, and yet the common mistake is to cut corners in this area. Although appealing in terms of aesthetics and cabling simplicity, the use of micro-phones mounted in ceilings as the primary source of audio in a classroom often creates more problems than it solves. No matter how good the system, problems will inevitably occur. When they do, the successful distance-learning practitioner has a good backup plan.
Acoustic considerations are among the most important for facility planners.
Considerations include absorption and reflectivity, ambient noise levels, reverberation effects, wall coverings, floors, windows, ceiling height and room size and geometry. Select a noise-free location 2. Use well-insulated walls 3. Avoid highly reflective surfaces such as glass, cinder blocks and bare wood paneling 4. Cover floors with carpet and windows with sound-absorbent materials 5.