Lavalier microphones, also known as clip-on microphones, are essential tools in many audiovisual contexts. Typically, they are oriented upward, towards the speaker's mouth. But beyond sparking discussions among audio professionals, why does the BBC recommend pointing them downward?
Generally omnidirectional, these microphones capture sound uniformly regardless of their angle. Their orientation does not affect the capture itself, but this technique is aimed at achieving subtle and effective sound optimization.
Reducing Plosives
Plosives, those sounds produced by bursts of air when pronouncing letters like "T", "P" or "B", can disrupt recordings with sudden and unpleasant noises. When placed directly in front of the mouth, a lavalier microphone is particularly exposed to these bursts of air. By orienting the microphone downward, the air is deflected by the microphone body, significantly reducing these nuisances and delivering smoother sound quality.
Minimizing Noise
This orientation not only reduces plosives but also helps minimize noise from nasal breathing, dynamic variations in voices unaccustomed to recording, and even accidental spittle. This approach is particularly useful in studio settings with multiple guests, especially when those guests are not media professionals and may produce unexpected noises.
Discretion
This method also offers an aesthetic advantage: it eliminates the need for windshields, which are often considered visually obtrusive. However, this argument only holds indoors; outdoors, these accessories remain essential for effectively countering wind noise.
Conclusion
Though widely adopted by many professionals, what can be called the "BBC method" is a simple yet ingenious technique that demonstrates how the orientation of a lavalier microphone can significantly impact recording quality, even for an omnidirectional microphone. By effectively reducing plosives and other noise, this technique ensures clearer, more consistent, and professional audio quality.
Have you ever tried this technique? What are your tips or tricks for improving sound quality? Share your experiences in the comments!
