If the weather gets cold, will the speed of sound increase, stay the same or slow down?

When the temperature is 15 degree, the speed is 340m/s.

When the temperature rises/falls by 5 degrees, the speed of sound rises/falls by 3 degrees.

The key factor of sound propagation is medium, which refers to all solid liquids and gases and is the premise of sound propagation. Physical parameters are related to the distance between the sound source and the observer, the vibration frequency of the sound source and the propagation medium.

Because the polar region is cold and hot in the equator, the air density in the polar region is higher than that in the equator, so the sound propagation speed in the polar region is higher than that in the equator. Generally speaking, V is solid >: V liquid > V gas. So v steel > v water > v air.

The propagation of sound needs matter, which is called medium in physics.

The propagation speed of sound in different media;

Vacuum 0m/s (i.e. unable to propagate)

Air (15℃) 340m/s

Air (25℃) 346m/s

Cork 500 m/s

Kerosene (25℃)1324m/s

Distilled water (25℃)1497m/s

Seawater (25℃) 153 1m/s

Copper (bar) 3750m/s

Marble 38 10/0m/s

Aluminum (bar) 5000m/s

Iron (bar) 5200m/s

Sound travels at different speeds in different substances. There are two factors that affect the speed of sound propagation: medium and wave source.

When the ambient temperature changes, the density of air also changes (the higher the temperature, the greater the density, because the higher the temperature, the air will become hot and cold, so the local pressure will increase, that is, the density will increase), that is, the medium has changed.

The greater the density of the medium through which sound propagates, the faster the speed of sound propagation.

That is to say, the faster the sound propagates in a higher temperature environment.