Is vibrato used by changing pitch or wavering the amount of air used?

I m an oboists and I can already use vibrato but I d like to better understand it. If seen videos where the person says to raise and then lower the pitch quickly to create vibrato. I, however, learned vibrato by going "ho-ho-ho" with my air. Are they really the same thing or does it just depend on what... show more I m an oboists and I can already use vibrato but I d like to better understand it. If seen videos where the person says to raise and then lower the pitch quickly to create vibrato. I, however, learned vibrato by going "ho-ho-ho" with my air. Are they really the same thing or does it just depend on what works for the musician?
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