反響

1. Origins, structure, and basic meaning

• Structure: 反響 (はんきょう) is a noun for a strong public response or for sound reverberating through a space.
• Basic usage: 反響を呼んだ describes a lecture drawing an unexpectedly large response, while 声が反響して describes sound reverberating in a hall and impairing clarity.

2. Common pitfalls and similar expressions

• Public response and acoustic echo
  • 反響を呼ぶ figuratively denotes people’s response, whereas 声が反響する is physical sound reflection. The first example does not imply a literal echo.