Microphones

Free Mic Distance Loss Calculator & Gain Estimator Tool

Getting clean, consistent audio isn’t just about using a good mic—it’s about placing it at the right distance and knowing how much gain to dial in afterward.

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The Mic Distance Loss Estimator lets you do that math instantly: enter your microphone’s sensitivity, set the reference and target distances, and the tool plots exactly how many decibels of signal you’ll lose in free-field conditions while recommending the pre-amp gain needed to hit a healthy recording level.

Built-in presets for crowd-favourite mics—from the Shure SM7B to the Neumann U87 Ai—take the guesswork out of setup, and the interactive log-scale chart makes it easy to see how moving just a few inches can change everything.

Mic Distance Loss Estimator

Mic Distance Loss Estimator

Current Estimates:

Signal at mic:

-- dB SPL

Needed preamp gain:

-- dB

e.g. 70 dB SPL measured 0.30 m from the source

Default 0.30 m (1 ft)

Slider from 0.1 m – 10 m, log scale (approximated)

Pick list (dBV/Pa or mV/Pa) or manual numeric entry

Default –18 dBFS (typical headroom point)

Predicted Signal & Gain vs. Distance

Gain-range indicator: Shaded bands represent typical pre-amp gain capabilities: Consumer (≤ +20 dB), Prosumer (+20 – +55 dB), High-gain specialty (> +55 dB).

Important Disclaimer:

This tool assumes free-field conditions (-6 dB per doubling of distance). Note that room reflections/clutter, line arrays, and directional mics can significantly alter the real-world result. Use this tool as a predictive guide, not an absolute measurement.

Affiliate Disclosure: Soundmaxpro.com is a participant in the Amazon Services LLC Associates Program. As an Amazon Associate we earn from qualifying purchases.

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