As engineers we’re often told to “trust our ears.” While this is usually sound advice (no pun intended) there are factors that can cloud our judgement and make those ears less than trustworthy in some cases. The way we experience sound is a combination of our hearing and our brain’s psychological processing — this is known as psychoacoustics.
How do we perceive sound? Well it seems simple enough (ok, it’s not that simple): sound waves travel through the air as compressions and rarefactions, these travel through our outer ears and cause our eardrums to vibrate, this vibration is transmitted via tiny bones in the inner ear and translated to electrical impulses by thousands of little hair cells.
Once the mechanical sound has been transformed into electrical signals and picked up by the hearing nerve it gets a lot less straightforward. Our brain now has to make sense of the vibrations that hit our eardrum. This is where psychoacoustics come into play.
We don’t always receive perfect and coherent information through those vibrations hitting our ears. Our brain then needs to fill in the gaps. A lot of times our brain guesses right and fills in the missing piece of our reality.
Full story Via theproaudiofiles.com