Which sound can be heard by humans?

Humans can generally hear sounds within a specific range of frequencies known as the audible range. The audible range for most humans is typically between 20 Hz and 20,000 Hz (or 20 kHz).

The sound produced by Rhinoceroses to communicate are generally below the lower limit of human hearing, so we cannot hear these sounds.

Infrasounds are sounds with frequencies below the lower limit of human hearing, typically below 20 Hz.

Ultrasounds are sounds with frequencies above the upper limit of human hearing, typically above 20,000 Hz.

Car sirens produce sounds within the audible range, typically between a few hundred hertz to a few kilohertz. These sounds fall within the range that humans can hear, so we can hear car sirens when they are activated.

Hence, the answer is Car siren.