ɸ vs β

Voiceless Bilabial Fricative vs Voiced Bilabial Fricative

How these sounds differ

ɸ
Voiceless Bilabial Fricative
Voicing
voiceless
Place
bilabial
Manner
fricative
Class
consonant
In languages
35 / 500
Full details →
β
Voiced Bilabial Fricative
Voicing
voiced
Place
bilabial
Manner
fricative
Class
consonant
In languages
53 / 500
Full details →

Cross-linguistic distribution

35
Languages with ɸ
11
Languages with both
53
Languages with β

11 languages in our database contrast both sounds as distinct phonemes. Languages that have one but not the other tend to merge them into a single phoneme — meaning speakers of those languages often struggle to hear the distinction when learning a language that contrasts them.