Thread by @ShAmmarKhatib1

@Hamza33974003 @PhDniX I see.
Regarding the passage you referred to, Sibawayh classified the category of Aswat mushrabah into 3 categories:
1. Among the Aswat mushrabah are those accompanied by Qalaqa when pausing:
ق ط ب ج د
These sounds are all
شديدة مجهورة

@Hamza33974003 @PhDniX 2. Aswat mushrabah with
نفخة
ز ظ ذ ض ر
رخوة مجهورة
According to Sibawayh, this nafkhah is caused by:
لأن هذه الحروف إذا خرجت بصوت الصدر انسل آخره
This part of his statement
انسل آخره
lead to different interpretations among the Arab phoneticians.

@Hamza33974003 @PhDniX According to some phoneticians, this nafkhah is caused by the stoppage of the "chest tone" according to Sibawayh.

Sibawayh also mentioned here that the mahmus sounds
(ف ح ث ه ش خ ص س ك ت)
are accompanied by
نفخ
when pausing.
No chest sound...

@Hamza33974003 @PhDniX 3. Aswat mushrabah that is not accompanied by Qalaqah or nafkhah:
ل م ن ع غ ء

@Hamza33974003 @PhDniX @threadreaderapp unroll

@Hamza33974003 @PhDniX "for fricatives (rixw) he pays more attention the presence or absence of voicing (sawt al-sadr)"

If I may ask, on what basis you came to this conclusion?
Maybe you can explain further...

@Hamza33974003 @PhDniX "...one might suppose he’s referring to a ص which is less strongly pharyngealized than normal, but I don’t think that’s plausible..."

If you mean a semi-iṭbāq ṣād, I do think that’s plausible...This is one of the possibilities I explained in my thread.