Yes, the letter "W" is considered a soft sound. It is a voiced labiodental approximant, pronounced by bringing the lips close together without contacting them.

The voiceless consonant that has the same place of articulation as "b" (bilabial) and the same passive of articulation as "v" (labiodental) is "p."

Periodontal is the medical term meaning pertaining to around the tooth.

Labio_lips, dental_teeth. Labiodental, in language, relates to consonants created with the use of the lips as well as the teeth, such as when forming words starting with the letter "F" or "ph" "pf", with an expellation of air rather than the use of vocal chords.

Unlike consonants are consonant sounds that are produced using different articulatory features. For example, "p" and "f" are unlike consonants because they are produced with different manners of articulation - "p" is a bilabial stop and "f" is a labiodental fricative.