減衰

1. Origins, structure, and basic meaning

• Structure: 減衰, read げんすい, means a signal, sound, or similar effect gradually weakening.
• Basic usage: It is used for wireless signals weakening through walls or sound weakening over distance.

2. Common pitfalls and similar expressions

• Distinguishing 減少
  • 減少 broadly describes a reduction in number or quantity. 減衰 focuses on the weakening intensity of things such as vibrations or signals.