Neat technology, but nonsense title. The Stethoscope is rarely used for something as specific as the heartbeat anymore. Listening to various body systems, though? That’s where it finds use.
Are the lungs congested? Confirming what the sinus rhythm is showi?
Computers, for all their advancements are still diagnostic tools that need confirmation. They still give off false positives and miss things.
They refused to send a model and asked him not to review until the new software was out. So they knew. He bought one anyway.