sounding machine

sounding machine

[′sau̇nd·iŋ mə‚shēn]
(engineering)
An instrument for measuring the depth of water, consisting essentially of a reel of wire; to one end of this wire there is attached a weight which carries a device for measuring and recording the depth; a crank or motor reels in the wire.
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References in periodicals archive ?
This superb sounding machine from Steepletone, allows you to play your old (and new of course) 33, 45 and 78 rpm records, your favourite CD's or tapes, and tune in to your choice of radio station.