Journal
Sound in classrooms
A lesson is lost when the back row cannot hear the teacher.
Classrooms are often hard rooms: flat walls, low ceilings, and no plan for speech. Raising the volume does not fix missing consonants.
The useful system is simple: a clear teacher microphone, even coverage, and a level the class can sit with for an hour.
Schools also need the hall and the theater next to the classroom. We specify each room for its job.