That's interesting. I've never heard pin head crickets make any noise. The older ones call by rubbing their legs together, but don't have a vocal apparatus otherwise. My darts do indeed go for them when I order a bunch for a special treat, however.
In any event, be sure to dust the crickets with calcium/D3 and vitamins when you feed them, the same as fruit flies. A combination of Rep-Cal and Herptivite is well documented as a good combination.
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Patty
Pahsimeroi, Idaho
4 D. auratus blue
5 D. galactonotus pumpkin orange splash back
7 D. imitator
6 D. leucomelas
4 D. pumilio Bastimentos
4 D. fantasticus
6 P. terribilis mint and organe
4 D. reticulatus
4 D. castaneoticus
2 D. azureus
4 P vittatus
2 P. lugubris