kinetic theory

Molecules push against the walls of a box by bouncing off

What exactly is pressure?

Sound is something that all of us have heard about. What we perceive as sound is really variations in the air pressure on the eardrum. These variations propagate deeper into the ear as vibrations and then into the brain as electrical impulses. Pressure is therefore central to acousticians and everyone else working with sound.

In this post, I want to tell you about where air pressure comes from. This also tells us something about how the nature of air pressure limits how good it is possible for ears and microphones to become.

ARC blog header

My previous contributions to the blogosphere

(Do people still use the word ‘blogosphere’? No? Oh.)

This is not my first blog. I was also a co-founder and co-author of the Acoustics Research Centre blog while I was working at SINTEF Digital’s acoustics group. We intended this blog as a place where the acoustics researchers at NTNU and SINTEF could write about their research and their insights into acoustics. Over the years, I wrote several posts there, both under my own name and through the Acoustics Research Centre account.

Here are some of my favourites: …