Explanation please

[ayelite4782]

In the "Lower Intermediate Lesson #37 - U.G. Phone Home" there is a sentence I can't understand at all. Can someone explain the whole sentence from start to the end? "あんたの声は普段から子供っぽいっていうか、子供みたいに高いじゃない。でも今はガラガラ声だから誰でも間違うわよ。"

[WalterWills]

あんたの声は
Your voice...
普段から子供っぽい
...usually childish...
っていうか、
...or rather...
子供みたいに
...like a child...
高いじゃない。
...high, isn't it?
でも今は
But now...
ガラガラ声
..rough voice...
だから
therefore
誰でも
...anybody...
間違うわよ。
...make a mistake.

"Your voice is usually childish. Or rather, it's high like a child's. But now you have a rough voice so anybody would mistake you for someone else."

I'm guessing that the situation is a phone conversation where the speaker is explaining why they' didn't recognise the caller.

[karmitthefrog6725]

WalterWillsさん　説明ありがとうございます。
ayelite4782さん　こんにちは。
I'm sorry that we didn't reply to you for a long time.
Please take a look at WalterWills-san's explanation because it is really good one.
Thanks.

Motoko