Yes. I use a gentle "who" as a huff. The breath holding is important as well and so is the breathing first into the lower lungs, then getting the breath in to the mid lobes, and then the upper, so for me I use short breath in, hold, "who", medium breath in, hold, "who", and then long slow deep breath in (without raising shoulders), hold and
"who", although by then I've usually got one ready for a "huff" and then a productive cough. I actually say "who" or "huff". But if you Google you will find different techniques, and you just keep trying until you find one that works for you.