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).
As of 2015, the annual contribution limit for single tax filers for an HSA is $3,350. If you file taxes as a family, it is $6,650. You can make contributions until April 15 of the following year. Filers over age 55 can add an additional $1,000 toward the annual contribution.