I've said it several times, and I keep on putting it up because it says what you are saying is wrong.
It cannot produce real effects, it cannot protect.
Just like the wall cannot stop line of effect (although it can stop line of sight, which is not a direct effect, which is more what is meant by 'real' effects) a silence illusion cannot stop sound for real. It can fool someone into thinking there is no sound, but it cannot offer protection.
All of your, 'but it can make real sound so it must be able to negate real sound' just doesnt work. Illusions can make illusory sound, they can make sound seem to disapear, but they cannot exact real change (at least not illusions of this type).
Nothing you have said negates what the text actually states. You can play around with it and just assume that it is correct, but the text I have put up specifically denies it.
So, once again
SRD:
Because figments and glamers (see below) are unreal, they cannot produce real effects the way that other types of illusions can. They cannot cause damage to objects or creatures, support weight, provide nutrition, or provide protection from the elements
This spell does not do things along the lines of the raw, therefore it is labeled as the wrong school.
We are not talking mind effecting here for the guy who said that, we are not talking about making all illusions into transmutations, they are a special case which can intrude slighlty into many different schools, but the specific case of this one is that it cannot protect. Just like the illusory wall will not stop a fireball this spell cannot stop the damage from sonic based attacks and still be an illusion. Not possible.
It cannot produce real effects, it cannot protect.
Just like the wall cannot stop line of effect (although it can stop line of sight, which is not a direct effect, which is more what is meant by 'real' effects) a silence illusion cannot stop sound for real. It can fool someone into thinking there is no sound, but it cannot offer protection.
All of your, 'but it can make real sound so it must be able to negate real sound' just doesnt work. Illusions can make illusory sound, they can make sound seem to disapear, but they cannot exact real change (at least not illusions of this type).
Nothing you have said negates what the text actually states. You can play around with it and just assume that it is correct, but the text I have put up specifically denies it.
So, once again
SRD:
Because figments and glamers (see below) are unreal, they cannot produce real effects the way that other types of illusions can. They cannot cause damage to objects or creatures, support weight, provide nutrition, or provide protection from the elements
This spell does not do things along the lines of the raw, therefore it is labeled as the wrong school.
We are not talking mind effecting here for the guy who said that, we are not talking about making all illusions into transmutations, they are a special case which can intrude slighlty into many different schools, but the specific case of this one is that it cannot protect. Just like the illusory wall will not stop a fireball this spell cannot stop the damage from sonic based attacks and still be an illusion. Not possible.