超音波

1. Origins, structure, and basic meaning

• Structure: 超音波 is read as ちょうおんぱ and is a noun for ultrasound, sound waves with frequencies above the usual range of human hearing.
• Basic usage: Animal emission appears in 超音波を出す, while inspection appears in 超音波で内部を調べる.

2. Common pitfalls and similar expressions

• Sound and hearing range
  • It is a form of sound wave, but its high frequency is normally inaudible to humans.
• Uses
  • Bats can use it to sense their surroundings, and technicians can use it to inspect metal for internal cracks.