The Villain's Ledger Has No Heroes Chapter 49: How to Count a Living Voice

Gao Heng came to the morning meeting with a mechanical design so plain Shen Qiao initially mistook it for a child's toy. It consisted of two brass horns, a thin membrane of fish skin, and a weighted pendulum. When a person spoke into one horn, the membrane moved a needle across smoked paper. The second horn recorded the pressure of the reservoir line. If two distinct breathing rhythms appeared…