Question

If I use perish song and my Pokemon has soundproof ability will it receive the count?

Answer 1

No it will not.

Soundproof prevents all effect from sound moves, granting the user immunity from them

That's *effects, Bulbapedia.

Perish Song is on the list of moves Pokemon with Soundproof are immune to.

Source.

Comments

Even if the user has Soundproof via skill swap or entrainment?

Answer 2

No it will not receive the count.

Soundproof prevents all effects from sound moves, granting the user immunity from them. This includes Perish Song.

Source: Experience and Bulbapedia

Hope I helped :)