Why I Choose to Use a Microphone in the Classroom

After years of teaching, one thing has become very clear to me. If students cannot hear you well, learning suffers. That is why I really like using a microphone when I teach. Studies show that improved access to sound supports learning, and honestly, I will take anything that helps my students learn better.

Think about the students sitting in the back row. When they can hear clearly, they are not working to fill in the gaps of what was said. They are able to stay focused on the content itself. When students hear better, they retain information better. It really is that simple.

What the Research Tells Us

Research on classroom amplification systems consistently shows that improving access to the instructor’s voice supports attention, comprehension, and engagement. These systems help distribute sound evenly throughout the room so that all students receive the same auditory input regardless of where they are seated.

Dockrell and Shield found that improving classroom acoustics and voice clarity enhances listening conditions and supports learning and attention, particularly in environments with background noise. When speech is clearer, students spend less effort trying to hear and more effort processing and understanding information.

More recent research by Shiels and colleagues demonstrated that students with greater listening and processing challenges benefit the most from sound field amplification. While not every academic measure changes equally for all students, clearer access to spoken instruction helps support those who are most at risk of missing important information.

Across multiple studies, improved sound clarity has been associated with increased student engagement, better listening comprehension, and reduced teacher vocal strain. These benefits apply to all learners, not only those with diagnosed hearing concerns.

Projecting Versus Being Heard

A common response from educators is, “My voice projects.” That may be true. But projecting your voice often changes how you sound. When you have to project, it can come across as louder, sharper, or even irritated, even when that is not your intention.

Using a microphone allows you to keep your voice calm, steady, and conversational while still being clearly heard by everyone in the room. That calm delivery matters. Learning happens best in environments where students feel comfortable, not tense. When instructors are not straining their voices, they can maintain consistency, clarity, and presence throughout the entire class.

Research also shows that reduced vocal strain benefits instructors by allowing more sustainable teaching over longer periods. When instructors are not battling room acoustics, instruction quality remains more consistent.

Better Access Supports Better Learning

At the end of the day, teaching is about access. When students can hear you clearly from the front row to the back row, learning becomes more equitable. Using a microphone removes barriers that often go unnoticed and helps students focus on what truly matters, the content, the discussion, and the learning process.

So yes, I choose to use a microphone. It supports my students, it protects my voice, and the research supports what many of us already know from experience. When students can hear better, they learn better.

References

Dockrell, J. E., & Shield, B. M. (2012). The impact of sound field systems on learning and attention in elementary school classrooms. Journal of Educational Audiology, 18, 47 to 53.

Shiels, L., Carew, P., Tomlin, D., & Rance, G. (2025). The impact of classroom sound field systems on reading fluency in normal hearing students. npj Science of Learning, 10, 12.

Rosenberg, G. G., Blake Rahter, P., Heavner, J., Allen, L., Redmond, B. M., Phillips, J., & Stigers, K. (1999). Improving classroom acoustics using sound field amplification. Journal of Educational Audiology, 7, 13 to 18.

-Shelley Brown, MEd, BSDH, RDH