For 10 points, name this Italian scientist whose namesake effect states that fluid velocity increases as the diameter of the tube decreases.
This man's experiments with blue and yellow papers led to his conclusion that "I have never experienced a third color from the two overlapping colors," and Rayleigh unknowingly replicated his experiments concluding that spatial localization of sound is dependent on interaural level differences.  An (*) inlet named after this man ensures that only ions of a specified mass are injected into a flow tube used to study ion-molecule reactions; that kind of inlet is also used to reduce the noise level in fans.  A tube named after this man is commonly used to measure flow rate, and his namesake effect is often used in carburetors and is a special case of the Bernoulli Effect.  For 10 points, name this Italian scientist whose namesake effect states that fluid velocity increases as the diameter of the tube decreases.
This man's experiments with blue and yellow papers led to his conclusion that "I have never experienced a third color from the two overlapping colors," and Rayleigh unknowingly replicated his experiments concluding that spatial localization of sound is dependent on interaural level differences.  
Giovanni Battista (or Giambattista) {Venturi} (3) [DW]