Acceleration is the change in linear velocity.
An accelerometer is a sensor that measures acceleration.
An analog output sensor provides a voltage that is proportional to its input stimulus.
Angular acceleration is the rate of change of angular velocity over time.
Angular displacement is the relative change in angular position.
Angular velocity is the rate of change of angular displacement with respect to time.
A-weighting is a special noise weighting filter applied to noise measurements to better approximate human perception of low-level noise.