Singer Charlie Puth wrote to billionaire Elon Musk, complaining about the sonic boom created by SpaceX's rocket launches. "These sonic booms have gotten progressively louder since they started launching...in Santa Barbara," Puth said. "This one at 3am today felt like 150-160dB, violently shook our whole house and really frightened my pregnant wife. I hope they don't get louder," he added.