Very, very carefully.
You can't make a stethoscope you would need to go to a medical suppliers
The television show McGiver was about a young man that was great at taking everyday objects to make into other devices. When you make an improvised apparatus, you McGiver it.
The cost of an electronic stethoscope will vary in price depending the make of stethoscope and country one purchases from. In the United States the average price is between $50 and $200.
I'm not sure
To create an improvised beaker, you can use a glass jar with volume markings or a plastic bottle with a narrow neck. Make sure to calibrate the volume markings with water to ensure accuracy. Remember to handle improvised glassware with caution to avoid breakage and potential injury.
Stethoscope
funnel, rubber host and masking tape
What is a binaurals on a stethoscope
Depends : fingers, stethoscope, EKG.
what are improvised aids
Etymology is the study of words, where they originated, their derivatives and interpretations. Mostly in writings, so I don't think a stethoscope would make a useful tool.
Rene Laennec invented the stethoscope.