The auditory system changes a wide range of weak mechanical signals into a complex series of electrical signals in the central nervous system. Sound is a series of pressure changes in the air.
Itâs Not Too Late to Maximize Your 2016 HSA Contributions: Contribute Until April 17, 2017. One of the big pros of enrolling in a high-deductible health plan is that it is paired with a Health Savings Account (HSA).
In 2015, individuals can contribute $3,350 per year into an HSA while families can contribute $6,650. There is also a catch up contribution limit of $1,000 for those whoa re age 55 or older (note: catchup contributions for retirement accounts start at age 50).