East Persian'

The phonetical nature of the distinction between the two types of voiced obstruents varies by 'lect:

/B̤/	/B̬/	Description	Where
[b̤]	[b̰]	Brethy vs. creaky	The classical, high-class, prestige pronunciation
[b]	[b̰]	Plain vs. creaky	Most typical standard language pronunciation. Vowels after the plain series may retain a degree of brethiness, and the creaky series may be longer in pronunciation (contrasts based purely on length are however rare)
[b̥a̤]	[b̥a̰]	Brethy vs. creaky vowels, stop voicing weakening	Found in younger-generation urban speakers
[b] ~ [b̤]	[bˤ]	Plain to brethy vs. pharyngealized	Found in northern dialects, under West Altaic' influence
[pʰ]	[b]	Voiceless aspirated vs. plain voiced	Zagros highlands dialects
[b̤], [v]	[ʔb] ~ [ɓ], [ʔv]	Brethy vs. glottalized	High-class East Caucasian' accent
[b], [v]	[ʔb] ~ [ɓ], [v]	Plain vs. glottalized stops; no distinction elsewhere	Stereotypical East Caucasian' accent
[b̤] ~ [bʱ], [v]	[b], [v]	Aspirated vs. plain stops; no distinction elsewhere	West Caucasian' accent (obscure, but included for completeness)
[b]	[b]	No distinction	Stereotypical foreign barbarian accent