An internist, also called a general internist or doctor of internal medicine, is a medical doctor that specializes in the diagnosis and medical (nonsurgical) treatment of adults.
Exhaust resonators, meanwhile, further reduce the noise by making sound waves that cancel noises out. Structure A typical automotive exhaust resonator is made of a hollow steel cylindrical tube and is attached to the muffler of an exhaust system. This type of resonator is designed similar to that of an acoustic resonator, which creates an âexhaust noteâ that gives the exhaust noise a less annoying and more pleasant tone.
An exhaust system is usually piping used to guide reaction exhaust gases away from a controlled combustion inside an engine or stove. 1  The entire system conveys burnt gases from the engine and includes one or more exhaust pipes. Depending on the overall system design, the exhaust gas may flow through one or more of: 1  Cylinder head and exhaust manifold. 2  A turbocharger to increase engine power. 3  A catalytic converter to reduce air pollution. 4  A muffler (North America) / silencer (UK/India), to reduce noise.