Despite the fact that the medical subject does not affect our everyday life, some things the educated person the nobility is obliged. The difference between the stethoscope and phonendoscope is one of such moments.
The stethoscope is an acoustic medical device that allows hearing the internal sounds. The name of modification has been thought up by the scientist George Philip Cammann in 1852. The phonendoscope differs from a traditional stethoscope in existence of the strengthening hardly tense membrane sensitive to vibrations of a sound.
You, perhaps, are surprised, having learned that there is such medical measuring device as a stethoscope. In particular, this device is strongly used by modern health workers and doctors. Two of his bells have no membranes, and the third end is equipped with a membrane. In addition, if you are looking for a quality stethoscope suggests you visit Stethoscope Lab. There you will be able to find the reviews of the best stethoscopes available.
About a design: Material of a head can be a miscellaneous – plastic, aluminum or stainless steel. The best material is well processed stainless steel. It is important that the stethoscope densely adjoined to a body of the patient and their air did not get – any leak of air leads to losses on sound transmission.
The membrane, or diaphragm, has to be flexible, strong and densely adjoin to a body.
Tips (or olives) happen to be rigid plastic and soft rubber or helium. The second, of course, it is better as are attached to a form of an acoustical pass of the user.
Metal tubes can be connected by the pulling together metal spring that, certainly, increases the convenience of use. Head of stethoscopes can be unary, double (bell/membrane), double membrane (big diameter / small), double with a corrugated head. Besides, there are stethoscopes for babies and children of younger age, and also fatally stethoscopes for pregnant women for listening of a fruit.
Phonendoscope is an older type of the device that is created for the wiretap of the internals of a human body. The phonendoscope looks as the single extended tube which one end wider and more concave. This end the device leans against an auricle the doctor. Though the phonendoscope quite copes with the duties, it as the vast majority of ancient and respectable inventions is almost not used. However, it is possible to meet some modern versions of this device.