Why do Jap vehicles have high pitched horns compared to American vehicles.?

Because for many people it is easier to hear a higher pitch. Many horns you can also alter the pitch, or put a different one on

easier to hear with slanted ears?

If you ask this question without the racial slur I bet you'll get more answers.

Hi well Mine doesn't it has a very low tone being a 4X4 toyota.

Because Japanese people are shorter.

tradition