霧笛

1. Origins, structure, and basic meaning

• Structure: 霧笛 is read むてき.
• Basic usage: It refers to the deep, loud warning signal sounded by a ship or lighthouse in fog.

2. Common pitfalls and similar expressions

• Hearing the signal
  • 霧笛が聞こえた means that a foghorn could be heard through the fog.
• A reproduced sound
  • 霧笛の音 refers to the sound of a foghorn, including one recreated in a museum.