What Is the Proximity Effect?
Updated October 2026
The proximity effect is the extra bass a directional microphone adds when a sound source is very close to it. It can make a voice warm and full, or boomy and muddy.
The short version
- Directional mics boost low frequencies when the source is very close.
- A little proximity can add warmth; too much makes a voice boomy.
- Control it by changing the distance, the angle or a high-pass filter.
- It is normal and expected, not a fault in the mic.
The short definition
A directional microphone, such as a cardioid, picks up sound by comparing pressure at the front and back of its capsule. When the source is close, the bass pressure difference grows, so the low frequencies are boosted. That is the proximity effect.
When it helps
A little proximity gives a voice warmth and intimacy, which is why radio voices often sit close to the mic. For a narrator or a singer who wants a full sound, a close distance can be a deliberate choice.
When it hurts
Too close, the voice booms and the words become muddy. The low frequencies mask the clarity of speech. The boomy vocals guide explains how to fix it in a recording.
How to control it
Move back a few centimetres, speak slightly off-axis, or use a high-pass filter around 80 to 120 Hz to remove the extra rumble without losing the warmth.
Keep the warmth, lose the boom
Tunedzy’s tone step shapes the low end. Use Before and After to keep the warmth without the boom.
Free tools for this
Frequently asked questions
Is the proximity effect a fault?
No. It is how directional mics respond to close sources.
Do all mics have it?
Directional mics have it. Omnidirectional mics do not, to the same degree.
How do I hear it?
Record the same phrase at two distances and compare the low end.
Keep going
All guides and comparisons · Tunedzy Go on your phone · Pricing