Possible Clues:

• What to do in laboratory, measure speed of small bird?
• Test the concentration of, in chem lab
• Use indicator maybe to measure bird speed
• Measure the strength of, in a way
• Measure the strength of Asian attribute by the sound of it
• Measure songster's tempo?
• Bird falls on rodent with energy to test strength
• Measure via a reagant
• Test the strength of, in a way
• Measure the strength of (a solution) using a reagent