helium descrambler

/HH IY1 L IY0 AH0 M D IH0 S K R AE0 M B L ER0/

noun

1
(technical diving, saturation diving, underwater diving) An electronic device that lowers the pitch of speech, to compensate for the high-pitched speech of someone breathing in a helium atmosphere mixture (e.g. heliox or heliair), so as to be understandable to other people.

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