A Few, Quick Notes
The binaurals are rotated slightly forwards. Hold the Ultrascope so that the binaurals are pointing towards your face and place the tips in each ear.
Holding the Ultrascope head between thumb and middle finger, apply (or release) pressure using the index finger of the same hand.
Start with light pressure to hear low frequencies (heart sounds) and increase pressure for high frequencies (lung sounds). A medium amount of force is good for blood pressure and bowel listening.
For the loudest environments, cover the head with your hand and apply pressure with your palm.