防音

1. Origins, structure, and basic meaning

• Structure: 防音 (ぼうおん) denotes soundproofing and forms compounds for its materials and construction work.
• Basic usage: 防音材 is material attached to walls; 防音工事 is the work performed on a room.

2. Common pitfalls and similar expressions

• Material 防音材 and work 防音工事
  • Adding 材 creates a physical material, while 工事 creates the construction process.