One of the few compulsory gadgets that every doctor carries is the Stethoscope. A sophisticated assembly constructed out of steel and plastic, stethoscope is an age-old source to diagnose cardiac problems. Popularly known as “Doctor’s Weapon”, stethoscopes have seen innumerous changes in their structure and working since their invention in 1824. Models that can be tuned with a smart phone (yes, really!) have already hit the market. Peculiarly, almost every type of stethoscope has found its space in the vast world of medical experts. There’s one for a cardiac for example, a different one for a pediatrician and yet another for a physicist. This Insight covers one of the most popular types of stethoscopes: Littmann Stethoscopes, which you may recognize as the serpentine devices hanging around doctors in movies. These stethoscopes are one of the oldest species and are still recommended for their precise results. 

When the internet computing era was catching pace, it was speculated that people might get distant from their loved ones and will immerse themselves in the computer mania. However, the manner in which internet has brought people close is quite amazing.  Now important meetings don’t require one to travel long distances. They can be scheduled through video conferencing, just with a click of the mouse. The medical experts at New York City can directly involve themselves in an operation conducted at Nairobi. Several more applications are there that display tremendous ways in which internet based audio-video solutions have got people all over the world closer to each other. All these things might seem magic to a computer illiterate, but this is something that computer savvy people use every day.  

Earphones/Earbuds have been assisting mobile gadgets since the invention of walkman. Though they account for hardly a few percentage of the cost of the entire device but their evolution over the time has never been an easy challenge for the engineers. Shape, size, comfort and sound quality are the key parameters while designing an earphone.  From morning walk to making long journeys pleasant, ear phones cannot be kept out of the daily life.Technically speaking earphones falls in the category of transducers that convert electrical energy into sound energy.  Undoubtedly, over the years companies have been adding more and more complex features in the earphones to improve the listening experience of the users.  In this article we will explore more about the earphones.