Question

who invented microphone and stethoscope?​

Answer 1

Answer:

The stethoscope was invented in France in 1816 by René Laennec at the Necker-Enfants Malades Hospital in Paris. It consisted of a wooden tube and was monaural. Laennec invented the stethoscope because he was not comfortable placing his ear directly onto a woman's chest to listen to her heart.♥️

Explanation:

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Answer 2

microphone:

Berliner is credited with inventing the carbon-button microphone in 1876. Though there were other microphone technologies in existence, Berliner's design was more robust than the rest (including a liquid-based mic invented by Alexander Graham Bell).

stethoscope;Rene Theophile Hyacinthe Laënnec (1781–1826) was a French physician who, in 1816, invented the stethoscope. Using this new instrument, he investigated the sounds made by the heart and lungs and determined that his diagnoses were supported by the observations made during autopsies.