It was called the bullet train because it was rounded in front, but every time it went into a tunnel it would build up a pressure wave, and then it would create like a sonic boom when it exited.
Disebut kereta peluru sebab ujungnya membulat. Tapi setiap kali masuk dalam terowongan kereta itu akan membentuk gelombang tekanan. Lalu akan menghasilkan ledakan suara (&lt;i&gt;sonic boom&lt;/i&gt;) ketika keluar.