"顔と声が合わない"
- The face and voice don't match.
- Your voice doesn't match how you look.
可愛い顔なのにハスキーボイスなんだね!
- You have such a cute face but your voice is so husky!
- Your face is so pretty but your voice is very husky.
「顔と声が合わない」は次のように言えます。
ーHis/her face and voice don't match.
ーHis/her voice doesn't go with his/her face.
「合わない」は to match や to go with を使って言うと良いでしょう。
犬の場合;
His bark doesn't match his head/face.
「彼の鳴き声は顔と合わない」
猫の場合;
That cat's meow doesn't match its head.
「あの猫の鳴き声は顔と合わない」
動物の場合は、なぜか head を使う方が自然に聞こえますが、face でも通じます。
ご参考まで!