Some hearing milestones your child should reach in the first year of life: 1  Most newborn infants startle or jump to sudden loud noises. 2  By 3 months, a baby usually recognizes a parent's voice. 3  By 6 months, a baby can usually turn his or her eyes or head toward a sound.
(December 2008). Direct digital control (DDC) is the automated control of a condition or process by a digital device (computer). DDC is considered by many to be a more modern, granular and responsive update to older HVAC control systems based upon PLC technologies.
56 DDC CONTROL SYSTEM Å I.O.M. 3. Cooling Stage Control (Discharge temperature control of the cooling stages.)a. Left column indicates cooling stage number assignment.b. ï¬Off Belowï¬ column allows the turn off discharge temperature for the different cooling stages tobeconfigured.c.