A radio presenter’s voice is their primary instrument, but the microphone they speak into shapes how that voice reaches the listener. Understanding basic microphone technique — distance, angle, and consistency — makes a significant difference to broadcast audio quality, and it costs nothing.
Dynamic Versus Condenser Microphones
Broadcast studios typically use dynamic microphones. Dynamics like the Shure SM7B, Electro-Voice RE20, or Rode PodMic are robust, reject background noise well, and handle close-miking without the proximity handling issues that can trouble condenser microphones. Condensers are more sensitive and accurate but require a quieter environment and careful placement.
The Proximity Effect
Moving closer to a directional microphone increases bass frequencies — this is the proximity effect. Experienced presenters use it deliberately to add warmth to their voice. Too close, though, and consonants become exaggerated and plosive sounds — particularly B and P — cause loud thumps. A pop shield between presenter and microphone absorbs most of this energy before it reaches the capsule.
Working the Mic: Distance and Angle
The standard broadcast position is typically 15–25 centimetres from the microphone, slightly off-axis — angled a few degrees away from the direct path of breath. This reduces sibilance (harsh S sounds) and plosives without losing the warmth of on-axis sound. Presenters who move around a lot — turning to look at guests, looking down at scripts — benefit from a slightly wider working distance to keep the volume consistent.
Room Acoustics and Environment
Even the best microphone technique cannot compensate for a bad acoustic environment. Hard, parallel walls create reflections that make a room sound hollow and distracting. Broadcast studios use acoustic treatment — absorptive panels, diffusers, and carpeted floors — to control this. For remote recording or home studios, simple measures like heavy curtains, bookshelves full of books, and avoiding corners help considerably.
- Dynamic microphones suit most broadcast applications
- The proximity effect adds warmth but can cause plosive problems
- 15–25 cm, slightly off-axis is a solid starting position
- Pop shields reduce plosive thumps effectively
- Acoustic treatment matters as much as microphone choice
Listening back to recordings is the fastest way to improve. Small adjustments in distance, angle, and room position have an audible impact, and developing the habit of critical self-listening is what separates a competent broadcaster from a great-sounding one.