The metro station is located below, just beneath the street level.

The city has invested massively in the infrastructure to improve public transportation.

The city's infrastructure is being modernized.

Infrasound is a sound wave with a frequency lower than 20 Hz.

Infrasonic frequencies are imperceptible to the human ear.

Infrasounds are low-frequency sounds that are not audible to the human ear.

Animals can perceive infrasonic sounds.

The infrastructure of this company is well developed.

He committed a serious offense by driving while intoxicated.

Infractions are punishable by law.