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.
66 DDC CONTROL SYSTEM Å I.O.M. 3. Logging Control (Logging and Trending program configuration.)a. This configuration block will be discussed in a separate logging and trending program manual. 4. Thermostat Control (Thermostat setpoint range limitations.)a.