fit factor

Questions

What does fit factor mean?

A quantitative metric that measures how well a particular mask or respirator fits to a specific individual's face, defined as the ratio of the ambient concentration of aerosol particles to the concentration within the facepiece during use.

How to pronounce fit factor

1. Open the pronunciation page — Open the Speakur entry for “fit factor”.
2. Read the phonetic spelling — Read the IPA spelling () so you know which sounds to aim for.
3. Play the audio — Click Play to hear reference audio for “fit factor”.
4. Repeat and practice — Say “fit factor” aloud, matching stress and vowels until it feels natural.