Description: Determined integral of the sound power p over a specified time interval of duration t (starting at t1 and ending at t2); Name: Energy of sound
Description: determined integral of the sound power, p, over a stated time interval of duration t (starting at t1 and ending at t2); Name: sound energy
Description: Speed of rotation at which the frequency of vibration (or its multiples) corresponds to the rotor resonant (lateral or torsional) ; Name: Critical speed