Hi and welcome to BYC. As long as the chicks are running around, doing what chicks do, then the noise is a good sign that they are ok. If they are huddled next to a heat source and making noise, then they are too cold. As long as they are messing around, as chicks do, and eating and drinking then noise is a good thing. As to what the noise actually means, i prefer to avoid comparing chicken emotions with human ones - but using them as you have here, to try and explain your concern works well.
CT