References in periodicals archive ?
These serrations can be found on the trailing edge of the rotor blades and serve to reduce the aerodynamic sound power level overall.
Eight momarsa for the supply of (a) plastic kitchen utensils, (b) blood transfusion instruments, (c) operation theaters' tables, (d) other annual requisites, (e) a camera for entire eye checking for children, (f) an anesthetics instrument, (g) transport and treatment of toxic medical waste, also (h) an instrument to analyze and record sound, also another instrument to analyze aerodynamic sound.
Finally, he quoted a Salford University study on aerodynamic sound but failed to say that it concluded, "it might be prudent to carry out further research", but was ignored by government.