It could be conch in the sense of being used as a trumpet, and I heard leaves also, I suppose as being walked upon. Thank you all for your assistance. Incidentally it is a prize quiz, for a modest sum. T.
Leaves is a good one. I'm wondering if it's meant (incorrectly) to be an electrocardiogram (ie the "death tone" machine, although technically there's no such thing and it's just dramatic licence).